Articles | Volume 15, issue 5
https://doi.org/10.5194/tc-15-2357-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-15-2357-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
20 May 2021
Research article |
| 20 May 2021
Environmental drivers of circum-Antarctic glacier and ice shelf front retreat over the last two decades
German Remote Sensing Data Center (DFD), German Aerospace Center
(DLR), 82234 Weßling, Germany
Andreas J. Dietz
German Remote Sensing Data Center (DFD), German Aerospace Center
(DLR), 82234 Weßling, Germany
Christof Kneisel
Institute of Geography and Geology, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
Heiko Paeth
Institute of Geography and Geology, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
Claudia Kuenzer
German Remote Sensing Data Center (DFD), German Aerospace Center
(DLR), 82234 Weßling, Germany
Institute of Geography and Geology, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
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Johannes Buckel, Jan Mudler, Rainer Gardeweg, Christian Hauck, Christin Hilbich, Regula Frauenfelder, Christof Kneisel, Sebastian Buchelt, Jan Henrik Blöthe, Andreas Hördt, and Matthias Bücker
The Cryosphere, 17, 2919–2940, https://doi.org/10.5194/tc-17-2919-2023, https://doi.org/10.5194/tc-17-2919-2023, 2023
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This study reveals permafrost degradation by repeating old geophysical measurements at three Alpine sites. The compared data indicate that ice-poor permafrost is highly affected by temperature warming. The melting of ice-rich permafrost could not be identified. However, complex geomorphic processes are responsible for this rather than external temperature change. We suspect permafrost degradation here as well. In addition, we introduce a new current injection method for data acquisition.
Thorsten Hoeser, Stefanie Feuerstein, and Claudia Kuenzer
Earth Syst. Sci. Data, 14, 4251–4270, https://doi.org/10.5194/essd-14-4251-2022, https://doi.org/10.5194/essd-14-4251-2022, 2022
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The DeepOWT (Deep-learning-derived Offshore Wind Turbines) data set provides offshore wind energy infrastructure locations and their temporal deployment dynamics from July 2016 until June 2021 on a global scale. It differentiates between offshore wind turbines, platforms under construction, and offshore wind farm substations. It is derived by applying deep-learning-based object detection to Sentinel-1 imagery.
Mariel C. Dirscherl, Andreas J. Dietz, and Claudia Kuenzer
The Cryosphere, 15, 5205–5226, https://doi.org/10.5194/tc-15-5205-2021, https://doi.org/10.5194/tc-15-5205-2021, 2021
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We provide novel insight into the temporal evolution of supraglacial lakes across six major Antarctic ice shelves in 2015–2021. For Antarctic Peninsula ice shelves, we observe extensive meltwater ponding during the 2019–2020 and 2020–2021 summers. Over East Antarctica, lakes were widespread during 2016–2019 and at a minimum in 2020–2021. We investigate environmental controls, revealing lake ponding to be coupled to atmospheric modes, the near-surface climate and the local glaciological setting.
Daniel Abel, Felix Pollinger, and Heiko Paeth
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2018-420, https://doi.org/10.5194/hess-2018-420, 2018
Preprint withdrawn
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The results of this paper indicate a strong catchment based influence of snow water equivalent on droughts in the southwestern USA with a prediction skill for drought in spring and early summer. Additionally, it has been shown that drought indices with even simple potential evapotranspiration schemes are able to capture the effect of snow water equivalent and its melt on soil moisture and, thus, on evapotranspiration and temperature and, consequently, on droughts.
Heiko Paeth, Christian Steger, Jingmin Li, Sebastian G. Mutz, and Todd A. Ehlers
Clim. Past Discuss., https://doi.org/10.5194/cp-2017-111, https://doi.org/10.5194/cp-2017-111, 2017
Manuscript not accepted for further review
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We use a high-resolution regional climate model to investigate various episodes of distinct climate states over the Tibetan Plateau region during the Cenozoic rise of the Plateau and Quaternary glacial/interglacial cycles. The simulated changes are in good agreement with available paleo-climatic reconstructions from proxy data. It is shown that in some regions of the Tibetan Plateau the climate anomalies during the Quaternary have been as strong as the changes occurring during the uplift period.
Adrian Emmert and Christof Kneisel
The Cryosphere, 11, 841–855, https://doi.org/10.5194/tc-11-841-2017, https://doi.org/10.5194/tc-11-841-2017, 2017
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We investigated the internal structure of two alpine rock glaciers to derive information on their development. Through a 3-D mapping of the electrical resistivity distribution of the subsurface, we could detect variations of ice content and delimit frozen and unfrozen structures. Our study shows that the development of the investigated rock glaciers is influenced by not only creep processes and remnant ice from past glaciations but also recently buried ice patches and refreezing meltwater.
Related subject area
Discipline: Ice sheets | Subject: Antarctic
Seasonal variability in Antarctic ice shelf velocities forced by sea surface height variations
Revisiting temperature sensitivity: how does Antarctic precipitation change with temperature?
Cosmogenic-nuclide data from Antarctic nunataks can constrain past ice sheet instabilities
Exploring ice sheet model sensitivity to ocean thermal forcing and basal sliding using the Community Ice Sheet Model (CISM)
High mid-Holocene accumulation rates over West Antarctica inferred from a pervasive ice-penetrating radar reflector
Seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in Prydz Bay, East Antarctica
Modes of Antarctic tidal grounding line migration revealed by ICESat-2 laser altimetry
Megadunes in Antarctica: migration and characterization from remote and in situ observations
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds
Timescales of outlet-glacier flow with negligible basal friction: theory, observations and modeling
Antarctic contribution to future sea level from ice shelf basal melt as constrained by ice discharge observations
Anthropogenic and internal drivers of wind changes over the Amundsen Sea, West Antarctica, during the 20th and 21st centuries
New 10Be exposure ages improve Holocene ice sheet thinning history near the grounding line of Pope Glacier, Antarctica
Widespread slowdown in thinning rates of West Antarctic Ice Shelves
Antarctic surface climate and surface mass balance in the Community Earth System Model version 2 during the satellite era and into the future (1979–2100)
Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier
Hysteretic evolution of ice rises and ice rumples in response to variations in sea level
Variability in Antarctic surface climatology across regional climate models and reanalysis datasets
Sensitivity of the Ross Ice Shelf to environmental and glaciological controls
High-resolution subglacial topography around Dome Fuji, Antarctica, based on ground-based radar surveys over 30 years
Cosmogenic nuclide dating of two stacked ice masses: Ong Valley, Antarctica
Clouds drive differences in future surface melt over the Antarctic ice shelves
Rapid fragmentation of Thwaites Eastern Ice Shelf
Resolving glacial isostatic adjustment (GIA) in response to modern and future ice loss at marine grounding lines in West Antarctica
Review article: Existing and potential evidence for Holocene grounding line retreat and readvance in Antarctica
Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion
Net effect of ice-sheet–atmosphere interactions reduces simulated transient Miocene Antarctic ice-sheet variability
Sensitivity of Antarctic surface climate to a new spectral snow albedo and radiative transfer scheme in RACMO2.3p3
Overestimation and adjustment of Antarctic ice flow velocity fields reconstructed from historical satellite imagery
Brief communication: Impact of common ice mask in surface mass balance estimates over the Antarctic ice sheet
Automated mapping of the seasonal evolution of surface meltwater and its links to climate on the Amery Ice Shelf, Antarctica
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TanDEM-X PolarDEM 90 m of Antarctica: generation and error characterization
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Wind-induced seismic noise at the Princess Elisabeth Antarctica Station
Nunataks as barriers to ice flow: implications for palaeo ice sheet reconstructions
Quantifying the potential future contribution to global mean sea level from the Filchner–Ronne basin, Antarctica
Did Holocene climate changes drive West Antarctic grounding line retreat and readvance?
Downscaled surface mass balance in Antarctica: impacts of subsurface processes and large-scale atmospheric circulation
Investigating the internal structure of the Antarctic ice sheet: the utility of isochrones for spatiotemporal ice-sheet model calibration
What is the surface mass balance of Antarctica? An intercomparison of regional climate model estimates
Energetics of surface melt in West Antarctica
Brief communication: Thwaites Glacier cavity evolution
Assessment of ICESat-2 ice surface elevations over the Chinese Antarctic Research Expedition (CHINARE) route, East Antarctica, based on coordinated multi-sensor observations
Statistical emulation of a perturbed basal melt ensemble of an ice sheet model to better quantify Antarctic sea level rise uncertainties
Aerogeophysical characterization of Titan Dome, East Antarctica, and potential as an ice core target
Diverging future surface mass balance between the Antarctic ice shelves and grounded ice sheet
Physics-based SNOWPACK model improves representation of near-surface Antarctic snow and firn density
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Cyrille Mosbeux, Laurie Padman, Emilie Klein, Peter D. Bromirski, and Helen A. Fricker
The Cryosphere, 17, 2585–2606, https://doi.org/10.5194/tc-17-2585-2023, https://doi.org/10.5194/tc-17-2585-2023, 2023
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Antarctica's ice shelves (the floating extension of the ice sheet) help regulate ice flow. As ice shelves thin or lose contact with the bedrock, the upstream ice tends to accelerate, resulting in increased mass loss. Here, we use an ice sheet model to simulate the effect of seasonal sea surface height variations and see if we can reproduce observed seasonal variability of ice velocity on the ice shelf. When correctly parameterised, the model fits the observations well.
Lena Nicola, Dirk Notz, and Ricarda Winkelmann
The Cryosphere, 17, 2563–2583, https://doi.org/10.5194/tc-17-2563-2023, https://doi.org/10.5194/tc-17-2563-2023, 2023
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For future sea-level projections, approximating Antarctic precipitation increases through temperature-scaling approaches will remain important, as coupled ice-sheet simulations with regional climate models remain computationally expensive, especially on multi-centennial timescales. We here revisit the relationship between Antarctic temperature and precipitation using different scaling approaches, identifying and explaining regional differences.
Anna Ruth W. Halberstadt, Greg Balco, Hannah Buchband, and Perry Spector
The Cryosphere, 17, 1623–1643, https://doi.org/10.5194/tc-17-1623-2023, https://doi.org/10.5194/tc-17-1623-2023, 2023
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This paper explores the use of multimillion-year exposure ages from Antarctic bedrock outcrops to benchmark ice sheet model predictions and thereby infer ice sheet sensitivity to warm climates. We describe a new approach for model–data comparison, highlight an example where observational data are used to distinguish end-member models, and provide guidance for targeted sampling around Antarctica that can improve understanding of ice sheet response to climate warming in the past and future.
Mira Berdahl, Gunter Leguy, William H. Lipscomb, Nathan M. Urban, and Matthew J. Hoffman
The Cryosphere, 17, 1513–1543, https://doi.org/10.5194/tc-17-1513-2023, https://doi.org/10.5194/tc-17-1513-2023, 2023
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Contributions to future sea level from the Antarctic Ice Sheet remain poorly constrained. One reason is that ice sheet model initialization methods can have significant impacts on how the ice sheet responds to future forcings. We investigate the impacts of two key parameters used during model initialization. We find that these parameter choices alone can impact multi-century sea level rise by up to 2 m, emphasizing the need to carefully consider these choices for sea level rise predictions.
Julien A. Bodart, Robert G. Bingham, Duncan A. Young, Joseph A. MacGregor, David W. Ashmore, Enrica Quartini, Andrew S. Hein, David G. Vaughan, and Donald D. Blankenship
The Cryosphere, 17, 1497–1512, https://doi.org/10.5194/tc-17-1497-2023, https://doi.org/10.5194/tc-17-1497-2023, 2023
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Estimating how West Antarctica will change in response to future climatic change depends on our understanding of past ice processes. Here, we use a reflector widely visible on airborne radar data across West Antarctica to estimate accumulation rates over the past 4700 years. By comparing our estimates with current atmospheric data, we find that accumulation rates were 18 % greater than modern rates. This has implications for our understanding of past ice processes in the region.
Na Li, Ruibo Lei, Petra Heil, Bin Cheng, Minghu Ding, Zhongxiang Tian, and Bingrui Li
The Cryosphere, 17, 917–937, https://doi.org/10.5194/tc-17-917-2023, https://doi.org/10.5194/tc-17-917-2023, 2023
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The observed annual maximum landfast ice (LFI) thickness off Zhongshan (Davis) was 1.59±0.17 m (1.64±0.08 m). Larger interannual and local spatial variabilities for the seasonality of LFI were identified at Zhongshan, with the dominant influencing factors of air temperature anomaly, snow atop, local topography and wind regime, and oceanic heat flux. The variability of LFI properties across the study domain prevailed at interannual timescales, over any trend during the recent decades.
Bryony I. D. Freer, Oliver J. Marsh, Anna E. Hogg, Helen Amanda Fricker, and Laurie Padman
The Cryosphere Discuss., https://doi.org/10.5194/tc-2022-265, https://doi.org/10.5194/tc-2022-265, 2023
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We develop a method using ICESat-2 data to measure how Antarctic grounding lines (GLs) migrate across the tide cycle. At an ice plain on the Ronne Ice Shelf we observe 15 km of tidal GL migration - the largest reported distance in Antarctica, dominating any signal of long-term migration. We identify four distinct migration modes, which provide both observational support for models of tidal ice flexure and GL migration, and insights into ice shelf-ocean-subglacial interactions in grounding zones.
Giacomo Traversa, Davide Fugazza, and Massimo Frezzotti
The Cryosphere, 17, 427–444, https://doi.org/10.5194/tc-17-427-2023, https://doi.org/10.5194/tc-17-427-2023, 2023
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Megadunes are fields of huge snow dunes present in Antarctica and on other planets, important as they present mass loss on the leeward side (glazed snow), on a continent characterized by mass gain. Here, we studied megadunes using remote data and measurements acquired during past field expeditions. We quantified their physical properties and migration and demonstrated that they migrate against slope and wind. We further proposed automatic detections of the glazed snow on their leeward side.
Bertie W. J. Miles, Chris R. Stokes, Adrian Jenkins, Jim R. Jordan, Stewart S. R. Jamieson, and G. Hilmar Gudmundsson
The Cryosphere, 17, 445–456, https://doi.org/10.5194/tc-17-445-2023, https://doi.org/10.5194/tc-17-445-2023, 2023
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Satellite observations have shown that the Shirase Glacier catchment in East Antarctica has been gaining mass over the past 2 decades, a trend largely attributed to increased snowfall. Our multi-decadal observations of Shirase Glacier show that ocean forcing has also contributed to some of this recent mass gain. This has been caused by strengthening easterly winds reducing the inflow of warm water underneath the Shirase ice tongue, causing the glacier to slow down and thicken.
Johannes Feldmann and Anders Levermann
The Cryosphere, 17, 327–348, https://doi.org/10.5194/tc-17-327-2023, https://doi.org/10.5194/tc-17-327-2023, 2023
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Here we present a scaling relation that allows the comparison of the timescales of glaciers with geometric similarity. According to the relation, thicker and wider glaciers on a steeper bed slope have a much faster timescale than shallower, narrower glaciers on a flatter bed slope. The relation is supported by observations and simplified numerical simulations. We combine the scaling relation with a statistical analysis of the topography of 13 instability-prone Antarctic outlet glaciers.
Eveline C. van der Linden, Dewi Le Bars, Erwin Lambert, and Sybren Drijfhout
The Cryosphere, 17, 79–103, https://doi.org/10.5194/tc-17-79-2023, https://doi.org/10.5194/tc-17-79-2023, 2023
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The Antarctic ice sheet (AIS) is the largest uncertainty in future sea level estimates. The AIS mainly loses mass through ice discharge, the transfer of land ice into the ocean. Ice discharge is triggered by warming ocean water (basal melt). New future estimates of AIS sea level contributions are presented in which basal melt is constrained with ice discharge observations. Despite the different methodology, the resulting projections are in line with previous multimodel assessments.
Paul R. Holland, Gemma K. O'Connor, Thomas J. Bracegirdle, Pierre Dutrieux, Kaitlin A. Naughten, Eric J. Steig, David P. Schneider, Adrian Jenkins, and James A. Smith
The Cryosphere, 16, 5085–5105, https://doi.org/10.5194/tc-16-5085-2022, https://doi.org/10.5194/tc-16-5085-2022, 2022
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The Antarctic Ice Sheet is losing ice, causing sea-level rise. However, it is not known whether human-induced climate change has contributed to this ice loss. In this study, we use evidence from climate models and palaeoclimate measurements (e.g. ice cores) to suggest that the ice loss was triggered by natural climate variations but is now sustained by human-forced climate change. This implies that future greenhouse-gas emissions may influence sea-level rise from Antarctica.
Jonathan R. Adams, Joanne S. Johnson, Stephen J. Roberts, Philippa J. Mason, Keir A. Nichols, Ryan A. Venturelli, Klaus Wilcken, Greg Balco, Brent Goehring, Brenda Hall, John Woodward, and Dylan H. Rood
The Cryosphere, 16, 4887–4905, https://doi.org/10.5194/tc-16-4887-2022, https://doi.org/10.5194/tc-16-4887-2022, 2022
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Glaciers in West Antarctica are experiencing significant ice loss. Geological data provide historical context for ongoing ice loss in West Antarctica, including constraints on likely future ice sheet behaviour in response to climatic warming. We present evidence from rare isotopes measured in rocks collected from an outcrop next to Pope Glacier. These data suggest that Pope Glacier thinned faster and sooner after the last ice age than previously thought.
Fernando Paolo, Alex Gardner, Chad Greene, Johan Nilsson, Michael Schodlok, Nicole Schlegel, and Helen Fricker
EGUsphere, https://doi.org/10.5194/egusphere-2022-1128, https://doi.org/10.5194/egusphere-2022-1128, 2022
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We report on a slowdown in the rate of thinning and melting of West Antarctic ice shelves. We present the most comprehensive assessment of the Antarctic ice shelves to date, where we analyze at continental scale the changes in thickness, flow and basal melt over the past 26 years. We also present a novel firn and surface mass balance model for Antarctica, and a time-dependent data set of ice-shelf thickness and basal melt rates at unprecedented resolution.
Devon Dunmire, Jan T. M. Lenaerts, Rajashree Tri Datta, and Tessa Gorte
The Cryosphere, 16, 4163–4184, https://doi.org/10.5194/tc-16-4163-2022, https://doi.org/10.5194/tc-16-4163-2022, 2022
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Earth system models (ESMs) are used to model the climate system and the interactions of its components (atmosphere, ocean, etc.) both historically and into the future under different assumptions of human activity. The representation of Antarctica in ESMs is important because it can inform projections of the ice sheet's contribution to sea level rise. Here, we compare output of Antarctica's surface climate from an ESM with observations to understand strengths and weaknesses within the model.
Helen Ockenden, Robert G. Bingham, Andrew Curtis, and Daniel Goldberg
The Cryosphere, 16, 3867–3887, https://doi.org/10.5194/tc-16-3867-2022, https://doi.org/10.5194/tc-16-3867-2022, 2022
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Hills and valleys hidden under the ice of Thwaites Glacier have an impact on ice flow and future ice loss, but there are not many three-dimensional observations of their location or size. We apply a mathematical theory to new high-resolution observations of the ice surface to predict the bed topography beneath the ice. There is a good correlation with ice-penetrating radar observations. The method may be useful in areas with few direct observations or as a further constraint for other methods.
A. Clara J. Henry, Reinhard Drews, Clemens Schannwell, and Vjeran Višnjević
The Cryosphere, 16, 3889–3905, https://doi.org/10.5194/tc-16-3889-2022, https://doi.org/10.5194/tc-16-3889-2022, 2022
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We used a 3D, idealised model to study features in coastal Antarctica called ice rises and ice rumples. These features regulate the rate of ice flow into the ocean. We show that when sea level is raised or lowered, the size of these features and the ice flow pattern can change. We find that the features depend on the ice history and do not necessarily fully recover after an equal increase and decrease in sea level. This shows that it is important to initialise models with accurate ice geometry.
Jeremy Carter, Amber Leeson, Andrew Orr, Christoph Kittel, and J. Melchior van Wessem
The Cryosphere, 16, 3815–3841, https://doi.org/10.5194/tc-16-3815-2022, https://doi.org/10.5194/tc-16-3815-2022, 2022
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Climate models provide valuable information for studying processes such as the collapse of ice shelves over Antarctica which impact estimates of sea level rise. This paper examines variability across climate simulations over Antarctica for fields including snowfall, temperature and melt. Significant systematic differences between outputs are found, occurring at both large and fine spatial scales across Antarctica. Results are important for future impact assessments and model development.
Francesca Baldacchino, Mathieu Morlighem, Nicholas R. Golledge, Huw Horgan, and Alena Malyarenko
The Cryosphere, 16, 3723–3738, https://doi.org/10.5194/tc-16-3723-2022, https://doi.org/10.5194/tc-16-3723-2022, 2022
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Understanding how the Ross Ice Shelf will evolve in a warming world is important to the future stability of Antarctica. It remains unclear what changes could drive the largest mass loss in the future and where places are most likely to trigger larger mass losses. Sensitivity maps are modelled showing that the RIS is sensitive to changes in environmental and glaciological controls at regions which are currently experiencing changes. These regions need to be monitored in a warming world.
Shun Tsutaki, Shuji Fujita, Kenji Kawamura, Ayako Abe-Ouchi, Kotaro Fukui, Hideaki Motoyama, Yu Hoshina, Fumio Nakazawa, Takashi Obase, Hiroshi Ohno, Ikumi Oyabu, Fuyuki Saito, Konosuke Sugiura, and Toshitaka Suzuki
The Cryosphere, 16, 2967–2983, https://doi.org/10.5194/tc-16-2967-2022, https://doi.org/10.5194/tc-16-2967-2022, 2022
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We constructed an ice thickness map across the Dome Fuji region, East Antarctica, from improved radar data and previous data that had been collected since the late 1980s. The data acquired using the improved radar systems allowed basal topography to be identified with higher accuracy. The new ice thickness data show the bedrock topography, particularly the complex terrain of subglacial valleys and highlands south of Dome Fuji, with substantially high detail.
Marie Bergelin, Jaakko Putkonen, Greg Balco, Daniel Morgan, Lee B. Corbett, and Paul R. Bierman
The Cryosphere, 16, 2793–2817, https://doi.org/10.5194/tc-16-2793-2022, https://doi.org/10.5194/tc-16-2793-2022, 2022
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Glacier ice contains information on past climate and can help us understand how the world changes through time. We have found and sampled a buried ice mass in Antarctica that is much older than most ice on Earth and difficult to date. Therefore, we developed a new dating application which showed the ice to be 3 million years old. Our new dating solution will potentially help to date other ancient ice masses since such old glacial ice could yield data on past environmental conditions on Earth.
Christoph Kittel, Charles Amory, Stefan Hofer, Cécile Agosta, Nicolas C. Jourdain, Ella Gilbert, Louis Le Toumelin, Étienne Vignon, Hubert Gallée, and Xavier Fettweis
The Cryosphere, 16, 2655–2669, https://doi.org/10.5194/tc-16-2655-2022, https://doi.org/10.5194/tc-16-2655-2022, 2022
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Model projections suggest large differences in future Antarctic surface melting even for similar greenhouse gas scenarios and warming rates. We show that clouds containing a larger amount of liquid water lead to stronger melt. As surface melt can trigger the collapse of the ice shelves (the safety band of the Antarctic Ice Sheet), clouds could be a major source of uncertainties in projections of sea level rise.
Douglas I. Benn, Adrian Luckman, Jan A. Åström, Anna J. Crawford, Stephen L. Cornford, Suzanne L. Bevan, Thomas Zwinger, Rupert Gladstone, Karen Alley, Erin Pettit, and Jeremy Bassis
The Cryosphere, 16, 2545–2564, https://doi.org/10.5194/tc-16-2545-2022, https://doi.org/10.5194/tc-16-2545-2022, 2022
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Thwaites Glacier (TG), in West Antarctica, is potentially unstable and may contribute significantly to sea-level rise as global warming continues. Using satellite data, we show that Thwaites Eastern Ice Shelf, the largest remaining floating extension of TG, has started to accelerate as it fragments along a shear zone. Computer modelling does not indicate that fragmentation will lead to imminent glacier collapse, but it is clear that major, rapid, and unpredictable changes are underway.
Jeannette Xiu Wen Wan, Natalya Gomez, Konstantin Latychev, and Holly Kyeore Han
The Cryosphere, 16, 2203–2223, https://doi.org/10.5194/tc-16-2203-2022, https://doi.org/10.5194/tc-16-2203-2022, 2022
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This paper assesses the grid resolution necessary to accurately model the Earth deformation and sea-level change associated with West Antarctic ice mass changes. We find that results converge at higher resolutions, and errors of less than 5 % can be achieved with a 7.5 km grid. Our results also indicate that error due to grid resolution is negligible compared to the effect of neglecting viscous deformation in low-viscosity regions.
Joanne S. Johnson, Ryan A. Venturelli, Greg Balco, Claire S. Allen, Scott Braddock, Seth Campbell, Brent M. Goehring, Brenda L. Hall, Peter D. Neff, Keir A. Nichols, Dylan H. Rood, Elizabeth R. Thomas, and John Woodward
The Cryosphere, 16, 1543–1562, https://doi.org/10.5194/tc-16-1543-2022, https://doi.org/10.5194/tc-16-1543-2022, 2022
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Recent studies have suggested that some portions of the Antarctic Ice Sheet were less extensive than present in the last few thousand years. We discuss how past ice loss and regrowth during this time would leave its mark on geological and glaciological records and suggest ways in which future studies could detect such changes. Determining timing of ice loss and gain around Antarctica and conditions under which they occurred is critical for preparing for future climate-warming-induced changes.
Stephen J. Chuter, Andrew Zammit-Mangion, Jonathan Rougier, Geoffrey Dawson, and Jonathan L. Bamber
The Cryosphere, 16, 1349–1367, https://doi.org/10.5194/tc-16-1349-2022, https://doi.org/10.5194/tc-16-1349-2022, 2022
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We find the Antarctic Peninsula to have a mean mass loss of 19 ± 1.1 Gt yr−1 over the 2003–2019 period, driven predominantly by changes in ice dynamic flow like due to changes in ocean forcing. This long-term record is crucial to ascertaining the region’s present-day contribution to sea level rise, with the understanding of driving processes enabling better future predictions. Our statistical approach enables us to estimate this previously poorly surveyed regions mass balance more accurately.
Lennert B. Stap, Constantijn J. Berends, Meike D. W. Scherrenberg, Roderik S. W. van de Wal, and Edward G. W. Gasson
The Cryosphere, 16, 1315–1332, https://doi.org/10.5194/tc-16-1315-2022, https://doi.org/10.5194/tc-16-1315-2022, 2022
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To gain understanding of how the Antarctic ice sheet responded to CO2 changes during past warm climate conditions, we simulate its variability during the Miocene. We include feedbacks between the ice sheet and atmosphere in our model and force the model using time-varying climate conditions. We find that these feedbacks reduce the amplitude of ice volume variations. Erosion-induced changes in the bedrock below the ice sheet that manifested during the Miocene also have a damping effect.
Christiaan T. van Dalum, Willem Jan van de Berg, and Michiel R. van den Broeke
The Cryosphere, 16, 1071–1089, https://doi.org/10.5194/tc-16-1071-2022, https://doi.org/10.5194/tc-16-1071-2022, 2022
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In this study, we improve the regional climate model RACMO2 and investigate the climate of Antarctica. We have implemented a new radiative transfer and snow albedo scheme and do several sensitivity experiments. When fully tuned, the results compare well with observations and snow temperature profiles improve. Moreover, small changes in the albedo and the investigated processes can lead to a strong overestimation of melt, locally leading to runoff and a reduced surface mass balance.
Rongxing Li, Yuan Cheng, Haotian Cui, Menglian Xia, Xiaohan Yuan, Zhen Li, Shulei Luo, and Gang Qiao
The Cryosphere, 16, 737–760, https://doi.org/10.5194/tc-16-737-2022, https://doi.org/10.5194/tc-16-737-2022, 2022
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Historical velocity maps of the Antarctic ice sheet are valuable for long-term ice flow dynamics analysis. We developed an innovative method for correcting overestimations existing in historical velocity maps. The method is validated rigorously using high-quality Landsat 8 images and then successfully applied to historical velocity maps. The historical change signatures are preserved and can be used for assessing the impact of long-term global climate changes on the ice sheet.
Nicolaj Hansen, Sebastian B. Simonsen, Fredrik Boberg, Christoph Kittel, Andrew Orr, Niels Souverijns, J. Melchior van Wessem, and Ruth Mottram
The Cryosphere, 16, 711–718, https://doi.org/10.5194/tc-16-711-2022, https://doi.org/10.5194/tc-16-711-2022, 2022
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We investigate the impact of different ice masks when modelling surface mass balance over Antarctica. We used ice masks and data from five of the most used regional climate models and a common mask. We see large disagreement between the ice masks, which has a large impact on the surface mass balance, especially around the Antarctic Peninsula and some of the largest glaciers. We suggest a solution for creating a new, up-to-date, high-resolution ice mask that can be used in Antarctic modelling.
Peter A. Tuckett, Jeremy C. Ely, Andrew J. Sole, James M. Lea, Stephen J. Livingstone, Julie M. Jones, and J. Melchior van Wessem
The Cryosphere, 15, 5785–5804, https://doi.org/10.5194/tc-15-5785-2021, https://doi.org/10.5194/tc-15-5785-2021, 2021
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Lakes form on the surface of the Antarctic Ice Sheet during the summer. These lakes can generate further melt, break up floating ice shelves and alter ice dynamics. Here, we describe a new automated method for mapping surface lakes and apply our technique to the Amery Ice Shelf between 2005 and 2020. Lake area is highly variable between years, driven by large-scale climate patterns. This technique will help us understand the role of Antarctic surface lakes in our warming world.
Zhongyang Hu, Peter Kuipers Munneke, Stef Lhermitte, Maaike Izeboud, and Michiel van den Broeke
The Cryosphere, 15, 5639–5658, https://doi.org/10.5194/tc-15-5639-2021, https://doi.org/10.5194/tc-15-5639-2021, 2021
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Antarctica is shrinking, and part of the mass loss is caused by higher temperatures leading to more snowmelt. We use computer models to estimate the amount of melt, but this can be inaccurate – specifically in the areas with the most melt. This is because the model cannot account for small, darker areas like rocks or darker ice. Thus, we trained a computer using artificial intelligence and satellite images that showed these darker areas. The model computed an improved estimate of melt.
Jamey Stutz, Andrew Mackintosh, Kevin Norton, Ross Whitmore, Carlo Baroni, Stewart S. R. Jamieson, Richard S. Jones, Greg Balco, Maria Cristina Salvatore, Stefano Casale, Jae Il Lee, Yeong Bae Seong, Robert McKay, Lauren J. Vargo, Daniel Lowry, Perry Spector, Marcus Christl, Susan Ivy Ochs, Luigia Di Nicola, Maria Iarossi, Finlay Stuart, and Tom Woodruff
The Cryosphere, 15, 5447–5471, https://doi.org/10.5194/tc-15-5447-2021, https://doi.org/10.5194/tc-15-5447-2021, 2021
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Understanding the long-term behaviour of ice sheets is essential to projecting future changes due to climate change. In this study, we use rocks deposited along the margin of the David Glacier, one of the largest glacier systems in the world, to reveal a rapid thinning event initiated over 7000 years ago and endured for ~ 2000 years. Using physical models, we show that subglacial topography and ocean heat are important drivers for change along this sector of the Antarctic Ice Sheet.
Birgit Wessel, Martin Huber, Christian Wohlfart, Adina Bertram, Nicole Osterkamp, Ursula Marschalk, Astrid Gruber, Felix Reuß, Sahra Abdullahi, Isabel Georg, and Achim Roth
The Cryosphere, 15, 5241–5260, https://doi.org/10.5194/tc-15-5241-2021, https://doi.org/10.5194/tc-15-5241-2021, 2021
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We present a new digital elevation model (DEM) of Antarctica derived from the TanDEM-X DEM, with new interferometric radar acquisitions incorporated and edited elevations, especially at the coast. A strength of this DEM is its homogeneity and completeness. Extensive validation work shows a vertical accuracy of just -0.3 m ± 2.5 m standard deviation on blue ice surfaces compared to ICESat laser altimeter heights. The new TanDEM-X PolarDEM 90 m of Antarctica is freely available.
Mariel C. Dirscherl, Andreas J. Dietz, and Claudia Kuenzer
The Cryosphere, 15, 5205–5226, https://doi.org/10.5194/tc-15-5205-2021, https://doi.org/10.5194/tc-15-5205-2021, 2021
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We provide novel insight into the temporal evolution of supraglacial lakes across six major Antarctic ice shelves in 2015–2021. For Antarctic Peninsula ice shelves, we observe extensive meltwater ponding during the 2019–2020 and 2020–2021 summers. Over East Antarctica, lakes were widespread during 2016–2019 and at a minimum in 2020–2021. We investigate environmental controls, revealing lake ponding to be coupled to atmospheric modes, the near-surface climate and the local glaciological setting.
Baptiste Frankinet, Thomas Lecocq, and Thierry Camelbeeck
The Cryosphere, 15, 5007–5016, https://doi.org/10.5194/tc-15-5007-2021, https://doi.org/10.5194/tc-15-5007-2021, 2021
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Icequakes are the result of processes occurring within the ice mass or between the ice and its environment. Having a complete catalogue of those icequakes provides a unique view on the ice dynamics. But the instruments recording these events are polluted by different noise sources such as the wind. Using the data from multiple instruments, we found how the wind noise affects the icequake monitoring at the Princess Elisabeth Station in Antarctica.
Martim Mas e Braga, Richard Selwyn Jones, Jennifer C. H. Newall, Irina Rogozhina, Jane L. Andersen, Nathaniel A. Lifton, and Arjen P. Stroeven
The Cryosphere, 15, 4929–4947, https://doi.org/10.5194/tc-15-4929-2021, https://doi.org/10.5194/tc-15-4929-2021, 2021
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Mountains higher than the ice surface are sampled to know when the ice reached the sampled elevation, which can be used to guide numerical models. This is important to understand how much ice will be lost by ice sheets in the future. We use a simple model to understand how ice flow around mountains affects the ice surface topography and show how much this influences results from field samples. We also show that models need a finer resolution over mountainous areas to better match field samples.
Emily A. Hill, Sebastian H. R. Rosier, G. Hilmar Gudmundsson, and Matthew Collins
The Cryosphere, 15, 4675–4702, https://doi.org/10.5194/tc-15-4675-2021, https://doi.org/10.5194/tc-15-4675-2021, 2021
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Using an ice flow model and uncertainty quantification methods, we provide probabilistic projections of future sea level rise from the Filchner–Ronne region of Antarctica. We find that it is most likely that this region will contribute negatively to sea level rise over the next 300 years, largely as a result of increased surface mass balance. We identify parameters controlling ice shelf melt and snowfall contribute most to uncertainties in projections.
Sarah U. Neuhaus, Slawek M. Tulaczyk, Nathan D. Stansell, Jason J. Coenen, Reed P. Scherer, Jill A. Mikucki, and Ross D. Powell
The Cryosphere, 15, 4655–4673, https://doi.org/10.5194/tc-15-4655-2021, https://doi.org/10.5194/tc-15-4655-2021, 2021
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We estimate the timing of post-LGM grounding line retreat and readvance in the Ross Sea sector of Antarctica. Our analyses indicate that the grounding line retreated over our field sites within the past 5000 years (coinciding with a warming climate) and readvanced roughly 1000 years ago (coinciding with a cooling climate). Based on these results, we propose that the Siple Coast grounding line motions in the middle to late Holocene were driven by relatively modest changes in regional climate.
Nicolaj Hansen, Peter L. Langen, Fredrik Boberg, Rene Forsberg, Sebastian B. Simonsen, Peter Thejll, Baptiste Vandecrux, and Ruth Mottram
The Cryosphere, 15, 4315–4333, https://doi.org/10.5194/tc-15-4315-2021, https://doi.org/10.5194/tc-15-4315-2021, 2021
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We have used computer models to estimate the Antarctic surface mass balance (SMB) from 1980 to 2017. Our estimates lies between 2473.5 ± 114.4 Gt per year and 2564.8 ± 113.7 Gt per year. To evaluate our models, we compared the modelled snow temperatures and densities to in situ measurements. We also investigated the spatial distribution of the SMB. It is very important to have estimates of the Antarctic SMB because then it is easier to understand global sea level changes.
Johannes Sutter, Hubertus Fischer, and Olaf Eisen
The Cryosphere, 15, 3839–3860, https://doi.org/10.5194/tc-15-3839-2021, https://doi.org/10.5194/tc-15-3839-2021, 2021
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Projections of global sea-level changes in a warming world require ice-sheet models. We expand the calibration of these models by making use of the internal architecture of the Antarctic ice sheet, which is formed by its evolution over many millennia. We propose that using our novel approach to constrain ice sheet models, we will be able to both sharpen our understanding of past and future sea-level changes and identify weaknesses in the parameterisation of current continental-scale models.
Ruth Mottram, Nicolaj Hansen, Christoph Kittel, J. Melchior van Wessem, Cécile Agosta, Charles Amory, Fredrik Boberg, Willem Jan van de Berg, Xavier Fettweis, Alexandra Gossart, Nicole P. M. van Lipzig, Erik van Meijgaard, Andrew Orr, Tony Phillips, Stuart Webster, Sebastian B. Simonsen, and Niels Souverijns
The Cryosphere, 15, 3751–3784, https://doi.org/10.5194/tc-15-3751-2021, https://doi.org/10.5194/tc-15-3751-2021, 2021
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We compare the calculated surface mass budget (SMB) of Antarctica in five different regional climate models. On average ~ 2000 Gt of snow accumulates annually, but different models vary by ~ 10 %, a difference equivalent to ± 0.5 mm of global sea level rise. All models reproduce observed weather, but there are large differences in regional patterns of snowfall, especially in areas with very few observations, giving greater uncertainty in Antarctic mass budget than previously identified.
Madison L. Ghiz, Ryan C. Scott, Andrew M. Vogelmann, Jan T. M. Lenaerts, Matthew Lazzara, and Dan Lubin
The Cryosphere, 15, 3459–3494, https://doi.org/10.5194/tc-15-3459-2021, https://doi.org/10.5194/tc-15-3459-2021, 2021
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We investigate how melt occurs over the vulnerable ice shelves of West Antarctica and determine that the three primary mechanisms can be evaluated using archived numerical weather prediction model data and satellite imagery. We find examples of each mechanism: thermal blanketing by a warm atmosphere, radiative heating by thin clouds, and downslope winds. Our results signify the potential to make a multi-decadal assessment of atmospheric stress on West Antarctic ice shelves in a warming climate.
Suzanne L. Bevan, Adrian J. Luckman, Douglas I. Benn, Susheel Adusumilli, and Anna Crawford
The Cryosphere, 15, 3317–3328, https://doi.org/10.5194/tc-15-3317-2021, https://doi.org/10.5194/tc-15-3317-2021, 2021
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The stability of the West Antarctic ice sheet depends on the behaviour of the fast-flowing glaciers, such as Thwaites, that connect it to the ocean. Here we show that a large ocean-melted cavity beneath Thwaites Glacier has remained stable since it first formed, implying that, in line with current theory, basal melt is now concentrated close to where the ice first goes afloat. We also show that Thwaites Glacier continues to thin and to speed up and that continued retreat is therefore likely.
Rongxing Li, Hongwei Li, Tong Hao, Gang Qiao, Haotian Cui, Youquan He, Gang Hai, Huan Xie, Yuan Cheng, and Bofeng Li
The Cryosphere, 15, 3083–3099, https://doi.org/10.5194/tc-15-3083-2021, https://doi.org/10.5194/tc-15-3083-2021, 2021
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We present the results of an assessment of ICESat-2 surface elevations along the 520 km CHINARE route in East Antarctica. The assessment was performed based on coordinated multi-sensor observations from a global navigation satellite system, corner cube retroreflectors, retroreflective target sheets, and UAVs. The validation results demonstrate that ICESat-2 elevations are accurate to 1.5–2.5 cm and can potentially overcome the uncertainties in the estimation of mass balance in East Antarctica.
Mira Berdahl, Gunter Leguy, William H. Lipscomb, and Nathan M. Urban
The Cryosphere, 15, 2683–2699, https://doi.org/10.5194/tc-15-2683-2021, https://doi.org/10.5194/tc-15-2683-2021, 2021
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Antarctic ice shelves are vulnerable to warming ocean temperatures and have already begun thinning in response to increased basal melt rates. Sea level is expected to rise due to Antarctic contributions, but uncertainties in rise amount and timing remain largely unquantified. To facilitate uncertainty quantification, we use a high-resolution ice sheet model to build, test, and validate an ice sheet emulator and generate probabilistic sea level rise estimates for 100 and 200 years in the future.
Lucas H. Beem, Duncan A. Young, Jamin S. Greenbaum, Donald D. Blankenship, Marie G. P. Cavitte, Jingxue Guo, and Sun Bo
The Cryosphere, 15, 1719–1730, https://doi.org/10.5194/tc-15-1719-2021, https://doi.org/10.5194/tc-15-1719-2021, 2021
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Radar observation collected above Titan Dome of the East Antarctic Ice Sheet is used to describe ice geometry and test a hypothesis that ice beneath the dome is older than 1 million years. An important climate transition occurred between 1.25 million and 700 thousand years ago, and if ice old enough to study this period can be removed as an ice core, new insights into climate dynamics are expected. The new observations suggest the ice is too young – more likely 300 to 800 thousand years old.
Christoph Kittel, Charles Amory, Cécile Agosta, Nicolas C. Jourdain, Stefan Hofer, Alison Delhasse, Sébastien Doutreloup, Pierre-Vincent Huot, Charlotte Lang, Thierry Fichefet, and Xavier Fettweis
The Cryosphere, 15, 1215–1236, https://doi.org/10.5194/tc-15-1215-2021, https://doi.org/10.5194/tc-15-1215-2021, 2021
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The future surface mass balance (SMB) of the Antarctic ice sheet (AIS) will influence the ice dynamics and the contribution of the ice sheet to the sea level rise. We investigate the AIS sensitivity to different warmings using physical and statistical downscaling of CMIP5 and CMIP6 models. Our results highlight a contrasting effect between the grounded ice sheet (where the SMB is projected to increase) and ice shelves (where the future SMB depends on the emission scenario).
Eric Keenan, Nander Wever, Marissa Dattler, Jan T. M. Lenaerts, Brooke Medley, Peter Kuipers Munneke, and Carleen Reijmer
The Cryosphere, 15, 1065–1085, https://doi.org/10.5194/tc-15-1065-2021, https://doi.org/10.5194/tc-15-1065-2021, 2021
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Snow density is required to convert observed changes in ice sheet volume into mass, which ultimately drives ice sheet contribution to sea level rise. However, snow properties respond dynamically to wind-driven redistribution. Here we include a new wind-driven snow density scheme into an existing snow model. Our results demonstrate an improved representation of snow density when compared to observations and can therefore be used to improve retrievals of ice sheet mass balance.
Aurélien Quiquet and Christophe Dumas
The Cryosphere, 15, 1031–1052, https://doi.org/10.5194/tc-15-1031-2021, https://doi.org/10.5194/tc-15-1031-2021, 2021
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We present here the GRISLI-LSCE contribution to the Ice Sheet Model Intercomparison Project for CMIP6 for Antarctica. The project aims to quantify the ice sheet contribution to global sea level rise for the next century. We show that increased precipitation in the future in some cases mitigates this contribution, with positive to negative values in 2100 depending of the climate forcing used. Sub-shelf-basal-melt uncertainties induce large differences in simulated grounding-line retreats.
Cited articles
Alley, R. B., Horgan, H. J., Joughin, I., Cuffey, K. M., Dupont, T. K.,
Parizek, B. R., Anandakrishnan, S., and Bassis, J.: A simple law for
ice-shelf calving, Science, 322, 1344–1344, 2008.
Arthur, J. F., Stokes, C. R., Jamieson, S. S. R., Carr, J. R., and Leeson, A. A.: Distribution and seasonal evolution of supraglacial lakes on Shackleton Ice Shelf, East Antarctica, The Cryosphere, 14, 4103–4120, https://doi.org/10.5194/tc-14-4103-2020, 2020.
Banwell, A.: Glaciology: Ice-shelf stability questioned, Nature, 544,
306–307, https://doi.org/doi.org/10.1038/544306a, 2017.
Banwell, A. F., MacAyeal, D. R., and Sergienko, O. V.: Breakup of the Larsen
B Ice Shelf triggered by chain reaction drainage of supraglacial lakes,
Geophys. Res. Lett., 40, 5872–5876, https://doi.org/10.1002/2013GL057694,
2013.
Bassis, J. N.: The statistical physics of iceberg calving and the emergence
of universal calving laws, J. Glaciol., 57, 3–16, 2011.
Bassis, J. N. and Walker, C. C.: Upper and lower limits on the stability of
calving glaciers from the yield strength envelope of ice, Proc. R. Soc.-Math. Phys. Eng. Sci., 468, 913–931,
https://doi.org/10.1098/rspa.2011.0422, 2012.
Bassis, J. N., Fricker, H. A., Coleman, R., and Minster, J.-B.: An
investigation into the forces that drive ice-shelf rift propagation on the
Amery Ice Shelf, East Antarctica, J. Glaciol., 54, 17–27, 2008.
Baumhoer, C. A: IceLines Antarctic Coastline 2018, available at: https://download.geoservice.dlr.de/icelines/files/, last access: 17 May 2021.
Baumhoer, C. A., Dietz, A., Dech, S., and Kuenzer, C.: Remote Sensing of Antarctic
Glacier and Ice-Shelf Front Dynamics – A Review, Remote Sens., 10, 1445,
https://doi.org/10.3390/rs10091445, 2018.
Baumhoer, C. A., Dietz, A. J., Kneisel, C., and Kuenzer, C.: Automated
Extraction of Antarctic Glacier and Ice Shelf Fronts from Sentinel-1 Imagery
Using Deep Learning, Remote Sens., 11, 2529,
https://doi.org/10.3390/rs11212529, 2019.
Belmonte Rivas, M. and Stoffelen, A.: Characterizing ERA-Interim and ERA5 surface wind biases using ASCAT, Ocean Sci., 15, 831–852, https://doi.org/10.5194/os-15-831-2019, 2019.
Benn, D. I., Warren, C. R., and Mottram, R. H.: Calving processes and the
dynamics of calving glaciers, Earth-Sci. Rev., 82, 143–179, 2007.
Bindschadler, R. A.: History of lower Pine Island Glacier, West Antarctica,
from Landsat imagery, J. Glaciol., 48, 536–544,
https://doi.org/10.3189/172756502781831052, 2002.
Bindschadler, R. A., Vornberger, P., Fleming, A., Fox, A., Mullins, J.,
Binnie, D., Paulsen, S. J., Granneman, B., and Gorodetzky, D.: The Landsat
image mosaic of Antarctica, Remote Sens. Environ., 112, 4214–4226, 2008.
Brandt-Kreiner, M., Lavelle, J., Tonboe, R., Howe, E., Lavergne, T., Killie,
M. A., Sorensen, A., Eastwood, S., and Neuville, A.: Global Sea Ice
ConcentrationClimate Data RecordValidation Report, Climate Data Store, OSI-450 and OSI-430-b, Version 1.1,
available at: http://osisaf.met.no/docs/osisaf_cdop3_ss2_valrep_sea-ice-conc-climate-data-record_v1p1.pdf (last access: 20 March 2020),
2019.
Braun, M. and Humbert, A.: Recent Retreat of Wilkins Ice Shelf Reveals New
Insights in Ice Shelf Breakup Mechanisms, IEEE Geosci. Remote Sens. Lett.,
6, 263–267, https://doi.org/10.1109/LGRS.2008.2011925, 2009.
Braun, M., Humbert, A., and Moll, A.: Changes of Wilkins Ice Shelf over the past 15 years and inferences on its stability, The Cryosphere, 3, 41–56, https://doi.org/10.5194/tc-3-41-2009, 2009.
Budge, J. S. and Long, D. G.: A Comprehensive Database for Antarctic Iceberg
Tracking Using Scatterometer Data, IEEE J. Sel. Top. Appl., 11, 434–442, https://doi.org/10.1109/JSTARS.2017.2784186, 2018.
Cape, M. R., Vernet, M., Skvarca, P., Marinsek, S., Scambos, T. A., and
Domack, E.: Foehn winds link climate-driven warming to ice shelf evolution
in Antarctica: Foehn winds link climate driven warming, J. Geophys. Res.-Atmos., 120, 11037–11057, https://doi.org/10.1002/2015JD023465, 2015.
Catania, G. A., Stearns, L. A., Sutherland, D. A., Fried, M. J.,
Bartholomaus, T. C., Morlighem, M., Shroyer, E., and Nash, J.: Geometric
Controls on Tidewater Glacier Retreat in Central Western Greenland, J.
Geophys. Res.-Earth, 123, 2024–2038,
https://doi.org/10.1029/2017JF004499, 2018.
Christianson, K., Bushuk, M., Dutrieux, P., Parizek, B. R., Joughin, I. R.,
Alley, R. B., Shean, D. E., Abrahamsen, E. P., Anandakrishnan, S., Heywood,
K. J., Kim, T.-W., Lee, S. H., Nicholls, K., Stanton, T., Truffer, M.,
Webber, B. G. M., Jenkins, A., Jacobs, S., Bindschadler, R. A., and Holland,
D. M.: Sensitivity of Pine Island Glacier to observed ocean forcing: PIG
response to ocean forcing, Geophys. Res. Lett., 43, 10817–10825,
https://doi.org/10.1002/2016GL070500, 2016.
Christie, F. D. W., Bingham, R. G., Gourmelen, N., Tett, S. F. B., and Muto,
A.: Four-decade record of pervasive grounding line retreat along the
Bellingshausen margin of West Antarctica: West Antarctic Ice Retreat,
Geophys. Res. Lett., 43, 5741–5749, https://doi.org/10.1002/2016GL068972,
2016.
Christie, F. D. W., Bingham, R. G., Gourmelen, N., Steig, E. J., Bisset, R. R., Pritchard, H. D., Snow, K., and Tett, S. F. B.: Glacier change along West Antarctica's Marie Byrd Land Sector and links to inter-decadal atmosphere–ocean variability, The Cryosphere, 12, 2461–2479, https://doi.org/10.5194/tc-12-2461-2018, 2018.
Chuter, S. J., Martín-Español, A., Wouters, B., and Bamber, J. L.:
Mass balance reassessment of glaciers draining into the Abbot and Getz Ice
Shelves of West Antarctica: Getz and Abbot Mass Balance Reassessment,
Geophys. Res. Lett., 44, 7328–7337, https://doi.org/10.1002/2017GL073087,
2017.
Cook, A. J. and Vaughan, D. G.: Overview of areal changes of the ice shelves on the Antarctic Peninsula over the past 50 years, The Cryosphere, 4, 77–98, https://doi.org/10.5194/tc-4-77-2010, 2010.
Cook, A. J., Holland, P. R., Meredith, M. P., Murray, T., Luckman, A., and
Vaughan, D. G.: Ocean forcing of glacier retreat in the western Antarctic
Peninsula, Science, 353, 283–286, 2016.
Copernicus Climate Change Service: ERA5 monthly averaged data on single
levels from 1979 to present, Climate Data Store, https://doi.org/10.24381/CDS.F17050D7, 2019a.
Copernicus Climate Change Service: ERA5-Land monthly averaged data from 1981
to present, Climate Data Store, https://doi.org/10.24381/CDS.68D2BB30, 2019b.
Cowton, T. R., Sole, A. J., Nienow, P. W., Slater, D. A., and
Christoffersen, P.: Linear response of east Greenland's tidewater glaciers
to ocean/atmosphere warming, P. Natl. Acad. Sci. USA, 115, 7907–7912,
https://doi.org/10.1073/pnas.1801769115, 2018.
Darelius, E., Fer, I., and Nicholls, K. W.: Observed vulnerability of
Filchner-Ronne Ice Shelf to wind-driven inflow of warm deep water, Nat.
Commun., 7, 12300, https://doi.org/10.1038/ncomms12300, 2016.
De Angelis, H. and Skvarca, P.: Glacier Surge After Ice Shelf Collapse,
Science, 299, 1560–1562, https://doi.org/10.1126/science.1077987, 2003.
Depoorter, M. A., Bamber, J. L., Griggs, J. A., Lenaerts, J. T. M.,
Ligtenberg, S. R. M., Van den Broeke, M. R., and Moholdt, G.: Calving fluxes
and basal melt rates of Antarctic ice shelves, Nature, 502, p. 89,
https://doi.org/10.1038/nature12567, 2013.
De Rydt, J., Gudmundsson, G. H., Rott, H., and Bamber, J. L.: Modeling the
instantaneous response of glaciers after the collapse of the Larsen B Ice
Shelf, Geophys. Res. Lett., 42, 5355–5363,
https://doi.org/10.1002/2015GL064355, 2015.
Dirscherl, M., Dietz, A. J., Kneisel, C., and Kuenzer, C.: Automated Mapping
of Antarctic Supraglacial Lakes Using a Machine Learning Approach, Remote
Sens., 12, 1203, https://doi.org/10.3390/rs12071203, 2020.
Domack, E., Duran, D., Leventer, A., Ishman, S., Doane, S., McCallum, S.,
Amblas, D., Ring, J., Gilbert, R., and Prentice, M.: Stability of the Larsen
B ice shelf on the Antarctic Peninsula during the Holocene epoch, Nature,
436, 681–685, https://doi.org/10.1038/nature03908, 2005.
Dutrieux, P., De Rydt, J., Jenkins, A., Holland, P. R., Ha, H. K., Lee, S.
H., Steig, E. J., Ding, Q., Abrahamsen, E. P., and Schroder, M.: Strong
Sensitivity of Pine Island Ice-Shelf Melting to Climatic Variability,
Science, 343, 174–178, https://doi.org/10.1126/science.1244341, 2014.
Embury, O.: Product Quality Assessment Report, Sea Surface Temperature, available at:
https://datastore.copernicus-climate.eu/documents/satellite-sea-surface-temperature/v2.0/D2.SST.2-v2.2_PQAR_of_v2SST_products_v4.1_APPROVED_Ver1.pdf (last access: 17 May 2021), 28 September 2019.
Feldmann, J. and Levermann, A.: Collapse of the West Antarctic Ice Sheet
after local destabilization of the Amundsen Basin, P. Natl. Acad. Sci. USA,
112, 14191–14196, https://doi.org/10.1073/pnas.1512482112, 2015.
Ferrigno, J., Foley, K. M., Swithinbank, C., Williams Jr., R. S., and Dailide,
L.: Coastal-Change And Glaciological Map Of The Ronne Ice Shelf
Area, Antarctica: 1974–2002, USGS Coast. Change Maps, I-2600-D, 1–11, 2005.
Ferrigno, J., Foley, K. M., Swithinbank, C., and Williams Jr., R. S.:
Coastal-Change and Glaciological Mapof the Northern Ross Ice Shelf
Area,Antarctica: 1962–2004, USGS Coast. Change Maps, 1–11, 2007.
Fountain, A. G., Glenn, B., and Scambos, T. A.: The changing extent of the
glaciers along the western Ross Sea, Antarctica, Geology, 45, 927–930,
2017.
Fricker, H. A., Young, N. W., Allison, I., and Coleman, R.: Iceberg calving
from the Amery Ice Shelf, East Antarctica, Ann. Glaciol., 34,
241–246, https://doi.org/10.3189/172756402781817581, 2002.
Friedl, P., Seehaus, T. C., Wendt, A., Braun, M. H., and Höppner, K.: Recent dynamic changes on Fleming Glacier after the disintegration of Wordie Ice Shelf, Antarctic Peninsula, The Cryosphere, 12, 1347–1365, https://doi.org/10.5194/tc-12-1347-2018, 2018.
Fürst, J. J., Durand, G., Gillet-Chaulet, F., Tavard, L., Rankl, M.,
Braun, M., and Gagliardini, O.: The safety band of Antarctic ice shelves,
Nat. Clim. Change, 6, 479–482, 2016.
Gagliardini, O., Durand, G., Zwinger, T., Hindmarsh, R. C. A., and Le Meur,
E.: Coupling of ice-shelf melting and buttressing is a key process in
ice-sheets dynamics, Geophys. Res. Lett., 37,
https://doi.org/10.1029/2010gl043334, 2010.
Gardner, A. S., Moholdt, G., Scambos, T., Fahnstock, M., Ligtenberg, S., van den Broeke, M., and Nilsson, J.: Increased West Antarctic and unchanged East Antarctic ice discharge over the last 7 years, The Cryosphere, 12, 521–547, https://doi.org/10.5194/tc-12-521-2018, 2018.
Giles, A. B.: The Mertz Glacier Tongue, East Antarctica. Changes in the past
100 years and its cyclic nature – Past, present and future, Remote Sens.
Environ., 191, 30–37, https://doi.org/10.1016/j.rse.2017.01.003, 2017.
Goel, V., Matsuoka, K., Berger, C. D., Lee, I., Dall, J., and Forsberg, R.:
Characteristics of ice rises and ice rumples in Dronning Maud Land and
Enderby Land, Antarctica, J. Glaciol., 66, 1064–1078,
https://doi.org/10.1017/jog.2020.77, 2020.
Gossart, A., Helsen, S., Lenaerts, J. T. M., Broucke, S. V., van Lipzig, N.
P. M., and Souverijns, N.: An Evaluation of Surface Climatology in
State-of-the-Art Reanalyses over the Antarctic Ice Sheet, J. Climate, 32,
6899–6915, https://doi.org/10.1175/JCLI-D-19-0030.1, 2019.
Haran, T., Bohlander, J., Scambos, T., Painter, T., and Fahnestock, M.:
MODIS Mosaic of Antarctica 2008–2009 (MOA2009) Image Map, Version 1,
[Antarctic Coastline 2009], NSIDC: National Snow and Ice Data Center,
Boulder, Colorado USA, https://doi.org/10.7265/N5KP8037, 2014.
Hazel, J. E. and Stewart, A. L.: Are the Near-Antarctic Easterly Winds
Weakening in Response to Enhancement of the Southern Annular Mode?, J.
Climate, 32, 1895–1918, https://doi.org/10.1175/JCLI-D-18-0402.1, 2019.
Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A.,
Muñoz-Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D.,
Simmons, A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P.,
Biavati, G., Bidlot, J., Bonavita, M., Chiara, G., Dahlgren, P., Dee, D.,
Diamantakis, M., Dragani, R., Flemming, J., Forbes, R., Fuentes, M., Geer,
A., Haimberger, L., Healy, S., Hogan, R. J., Hólm, E., Janisková,
M., Keeley, S., Laloyaux, P., Lopez, P., Lupu, C., Radnoti, G., Rosnay, P.,
Rozum, I., Vamborg, F., Villaume, S., and Thépaut, J.: The ERA5 global
reanalysis, Q. J. Roy. Meteor. Soc., 146, 1999–2049,
https://doi.org/10.1002/qj.3803, 2020.
Hogg, A. E. and Gudmundsson, G. H.: Impacts of the Larsen-C Ice Shelf
calving event, Nat. Clim. Change, 7, 540–542,
https://doi.org/10.1038/nclimate3359, 2017.
Holt, T. O., Glasser, N. F., Quincey, D. J., and Siegfried, M. R.: Speedup and fracturing of George VI Ice Shelf, Antarctic Peninsula, The Cryosphere, 7, 797–816, https://doi.org/10.5194/tc-7-797-2013, 2013.
Howat, I. M., Joughin, I., Fahnestock, M., Smith, B. E., and Scambos, T. A.:
Synchronous retreat and acceleration of southeast Greenland outlet glaciers
2000–06: ice dynamics and coupling to climate, J. Glaciol., 54, 646–660,
https://doi.org/10.3189/002214308786570908, 2008.
Hughes, T.: The weak underbelly of the West Antarctic ice sheet, J.
Glaciol., 27, 518–525, 1981.
Humbert, A., Gross, D., Müller, R., Braun, M., van de Wal, R. S. W., van
den Broeke, M. R., Vaughan, D. G., and van de Berg, W. J.: Deformation and
failure of the ice bridge on the Wilkins Ice Shelf, Antarctica, Ann.
Glaciol., 51, 49–55, https://doi.org/10.3189/172756410791392709,
2010.
IMBIE: Mass balance of the Antarctic Ice Sheet from 1992 to 2017, Nature,
558, 219–222, https://doi.org/10.1038/s41586-018-0179-y, 2018.
Jacobs, S. S., Jenkins, A., Giulivi, C. F., and Dutrieux, P.: Stronger ocean
circulation and increased melting under Pine Island Glacier ice shelf, Nat.
Geosci., 4, 519–523, 2011.
Jenkins, A., Shoosmith, D., Dutrieux, P., Jacobs, S., Kim, T. W., Lee, S.
H., Ha, H. K., and Stammerjohn, S.: West Antarctic Ice Sheet retreat in the
Amundsen Sea driven by decadal oceanic variability, Nat. Geosci., 11,
733–738, https://doi.org/10.1038/s41561-018-0207-4, 2018.
Jezek, K. C.: RADARSAT-1 Antarctic Mapping Project: change-detection and
surface velocity campaign, Ann. Glaciol., 34, 263–268, 2002.
Jezek, K. C., Curlander, J. C., Carsey, F., Wales, C., and Barry, R. G.:
RAMP AMM-1 SAR Image Mosaic of Antarctica, Version 2, [Antarctic Coastline
1997], NASA National Snow and Ice Data Center Distributed Active Archive
Center, Boulder, Colorado, https://doi.org/10.5067/8AF4ZRPULS4H, 2013.
Joughin, I. and Alley, R. B.: Stability of the West Antarctic ice sheet in a
warming world, Nat. Geosci., 4, 506–513, 2011.
Joughin, I. and MacAyeal, D. R.: Calving of large tabular icebergs from ice
shelf rift systems, Geophys. Res. Lett., 32, L02501,
https://doi.org/10.1029/2004GL020978, 2005.
Joughin, I., Smith, B. E., and Medley, B.: Marine Ice Sheet Collapse
Potentially Under Way for the Thwaites Glacier Basin, West Antarctica,
Science, 344, 735–738, https://doi.org/10.1126/science.1249055, 2014.
Khazendar, A., Rignot, E., and Larour, E.: Larsen B Ice Shelf rheology
preceding its disintegration inferred by a control method, Geophys. Res.
Lett., 34, L19503, https://doi.org/10.1029/2007GL030980, 2007.
Kim, K. T., Jezek, K. C., and Sohn, H. G.: Ice shelf advance and retreat
rates along the coast of Queen Maud Land, Antarctica, J. Geophys.
Res.-Oceans, 106, 7097–7106,
https://doi.org/10.1029/2000JC000317, 2001.
Konrad, H., Shepherd, A., Gilbert, L., Hogg, A. E., McMillan, M., Muir, A.,
and Slater, T.: Net retreat of Antarctic glacier grounding lines, Nat.
Geosci., 11, 258–258, 2018.
Kopp, R. E., DeConto, R. M., Bader, D. A., Hay, C. C., Horton, R. M., Kulp,
S., Oppenheimer, M., Pollard, D., and Strauss, B. H.: Evolving Understanding
of Antarctic Ice-Sheet Physics and Ambiguity in Probabilistic Sea-Level
Projections, Earths Future, 5, 1217–1233,
https://doi.org/10.1002/2017EF000663, 2017.
Kwok, R. and Comiso, J. C.: Spatial patterns of variability in Antarctic
surface temperature: Connections to the Southern Hemisphere Annular Mode and
the Southern Oscillation: Antarctic Surface Temperature, Geophys. Res.
Lett., 29, 50-1–50-4, https://doi.org/10.1029/2002GL015415, 2002.
Larour, E.: Modelling of rift propagation on Ronne Ice Shelf, Antarctica,
and sensitivity to climate change, Geophys. Res. Lett., 31, L16404,
https://doi.org/10.1029/2004GL020077, 2004.
Lavergne, T., Sørensen, A. M., Kern, S., Tonboe, R., Notz, D., Aaboe, S., Bell, L., Dybkjær, G., Eastwood, S., Gabarro, C., Heygster, G., Killie, M. A., Brandt Kreiner, M., Lavelle, J., Saldo, R., Sandven, S., and Pedersen, L. T.: Version 2 of the EUMETSAT OSI SAF and ESA CCI sea-ice concentration climate data records, The Cryosphere, 13, 49–78, https://doi.org/10.5194/tc-13-49-2019, 2019.
Leeson, A. A., Van Wessem, J. M., Ligtenberg, S. R. M., Shepherd, A., Van
Den Broeke, M. R., Killick, R., Skvarca, P., Marinsek, S., and Colwell, S.:
Regional climate of the Larsen B embayment 1980–2014, J. Glaciol., 63,
683–690, https://doi.org/10.1017/jog.2017.39, 2017.
Leeson, A. A., Forster, E., Rice, A., Gourmelen, N., and Wessem, J. M.:
Evolution of Supraglacial Lakes on the Larsen B Ice Shelf in the Decades
Before it Collapsed, Geophys. Res. Lett., 47, e2019GL085591,
https://doi.org/10.1029/2019GL085591, 2020.
Lipovsky, B. P.: Ice shelf rift propagation: stability, three-dimensional effects, and the role of marginal weakening, The Cryosphere, 14, 1673–1683, https://doi.org/10.5194/tc-14-1673-2020, 2020.
Liu, H. and Jezek, K. C.: A complete high-resolution coastline of Antarctica
extracted from orthorectified Radarsat SAR imagery, Photogramm. Eng. Rem.
S., 70, 605–616, https://doi.org/10.14358/pers.70.5.605, 2004.
Liu, Y., Moore, J. C., Cheng, X., Gladstone, R. M., Bassis, J. N., Liu, H.,
Wen, J., and Hui, F.: Ocean-driven thinning enhances iceberg calving and
retreat of Antarctic ice shelves, P. Natl. Acad. Sci. USA, 112, 3263–3268,
2015.
Lovell, A. M., Stokes, C. R., and Jamieson, S. S. R.: Sub-decadal variations
in outlet glacier terminus positions in Victoria Land, Oates Land and George
V Land, East Antarctica (1972–2013), Antarct. Sci., 29, 468–483,
https://doi.org/10.1017/S0954102017000074, 2017.
Lucchitta, B. K. and Rosanova, C. E.: Retreat of northern margins of George
VI and Wilkins Ice Shelves, Antarctic Peninsula, Ann. Glaciol.,
27, 41–46, 1998.
Luckman, A., Benn, D. I., Cottier, F., Bevan, S., Nilsen, F., and Inall, M.:
Calving rates at tidewater glaciers vary strongly with ocean temperature,
Nat. Commun., 6, 8566, https://doi.org/10.1038/ncomms9566, 2015.
Ludescher, J., Yuan, N., and Bunde, A.: Detecting the statistical
significance of the trends in the Antarctic sea ice extent: an indication
for a turning point, Clim. Dynam., 53, 237–244,
https://doi.org/10.1007/s00382-018-4579-3, 2019.
MacAyeal, D. R., Padman, L., Drinkwater, M., Fahnestock, M., Gotis, T. T.,
A., Gray, L., Kerman, B., Lazzara, M., Rignot, E., Scambos, T., and Stearns,
C.: Effects of Rigid Body Collisions and Tide-Forced Drift on Large Tabular
Icebergs of the Antarctic, The University of Chicago, Department of the Geophysical Sciences,
available at: http://geosci.uchicago.edu/~drm7/research/Icebergs_of_Y2k.pdf (last access: 2 December 2020), 2001.
Marshall, G. J.: Trends in the Southern Annular Mode from Observations and
Reanalyses, J. Climate, 16, 4134–4143, https://doi.org/10.1175/1520-0442(2003)016<4134:TITSAM>2.0.CO;2, 2003.
Marshall, G. J.: Half-century seasonal relationships between the Southern
Annular mode and Antarctic temperatures, Int. J. Climatol., 27, 373–383,
https://doi.org/10.1002/joc.1407, 2007.
Marshall, G. J.: The Climate Data Guide: Marshall Southern Annular Mode
(SAM) Index (Station-based), edited by: National Center for Atmospheric Research Staff, available at: https://climatedataguide.ucar.edu/climate-data/marshall-southern-annular-mode-sam-index-station-based (last access: 5 March 2020),
2018.
Massom, R., Reid, P., Stammerjohn, S., Raymond, B., Fraser, A., and Ushio,
S.: Change and Variability in East Antarctic Sea Ice Seasonality,
1979/80–2009/10, PLoS ONE, 8, e64756,
https://doi.org/10.1371/journal.pone.0064756, 2013.
Massom, R. A., Giles, A. B., Warner, R. C., Fricker, H. A., Legresy, B.,
Hyland, G., Lescarmontier, L., and Young, N.: External influences on the
Mertz Glacier Tongue (East Antarctica) in the decade leading up to its
calving in 2010, J. Geophys. Res.-Earth, 120, 490–506,
https://doi.org/10.1002/2014JF003223, 2015.
Massom, R. A., Scambos, T. A., Bennetts, L. G., Reid, P., Squire, V. A., and
Stammerjohn, S. E.: Antarctic ice shelf disintegration triggered by sea ice
loss and ocean swell, Nature, 558, 383–389,
https://doi.org/10.1038/s41586-018-0212-1, 2018.
Matsuoka, K., Hindmarsh, R. C. A., Moholdt, G., Bentley, M. J., Pritchard,
H. D., Brown, J., Conway, H., Drews, R., Durand, G., Goldberg, D.,
Hattermann, T., Kingslake, J., Lenaerts, J. T. M., Martín, C.,
Mulvaney, R., Nicholls, K. W., Pattyn, F., Ross, N., Scambos, T., and
Whitehouse, P. L.: Antarctic ice rises and rumples: Their properties and
significance for ice-sheet dynamics and evolution, Earth-Sci. Rev., 150,
724–745, https://doi.org/10.1016/j.earscirev.2015.09.004, 2015.
Mercer, J. H.: West Antarctic ice sheet and CO2 greenhouse effect: a threat
of disaster, Nature, 271, 321–325, 1978.
Miles, B. W. J., Stokes, C. R., and Jamieson, S. S. R.: Pan–ice-sheet
glacier terminus change in East Antarctica reveals sensitivity of Wilkes
Land to sea-ice changes, Sci. Adv., 2, e1501350,
https://doi.org/10.1126/sciadv.1501350, 2016.
Miles, B. W. J., Stokes, C. R., Jenkins, A., Jordan, J. R., Jamieson, S. S.
R., and Gudmundsson, G. H.: Intermittent structural weakening and
acceleration of the Thwaites Glacier Tongue between 2000 and 2018, J.
Glaciol., 66, 1–11, https://doi.org/10.1017/jog.2020.20, 2020.
Milillo, P., Rignot, E., Rizzoli, P., Scheuchl, B., Mouginot, J.,
Bueso-Bello, J., and Prats-Iraola, P.: Heterogeneous retreat and ice melt of
Thwaites Glacier, West Antarctica, Sci. Adv., 5, eaau3433,
https://doi.org/10.1126/sciadv.aau3433, 2019.
Mosbeux, C., Wagner, T. J. W., Becker, M. K., and Fricker, H. A.: Viscous
and elastic buoyancy stresses as drivers of ice-shelf calving, J. Glaciol.,
1–15, https://doi.org/10.1017/jog.2020.35, 2020.
Mouginot, J.: MEaSURES Antarctic Boundaries for IPY 2007–2009 from Satellite
Radar, Version 2, https://doi.org/10.5067/AXE4121732AD, 2017.
Mouginot, J., Rignot, E., and Scheuchl, B.: Continent-Wide, Interferometric
SAR Phase, Mapping of Antarctic Ice Velocity, Geophys. Res. Lett., 46,
9710–9718, https://doi.org/10.1029/2019GL083826, 2019.
Nakamura, K., Doi, K., and Shibuya, K.: Why is Shirase Glacier turning its
flow direction eastward?, Polar Sci., 1, 63–71,
https://doi.org/10.1016/j.polar.2007.09.003, 2007.
OSI SAF: OSI-450 Global Sea Ice Concentration Climate Data Record v2.0 –
Multimission (2.0), https://doi.org/10.15770/EUM_SAF_OSI_0008, 2017.
Paeth, H. and Pollinger, F.: Enhanced evidence in climate models for changes
in extratropical atmospheric circulation, Tellus Dyn. Meteorol. Oceanogr.,
62, 647–660, https://doi.org/10.1111/j.1600-0870.2010.00455.x, 2010.
Paolo, F. S., Fricker, H. A., and Padman, L.: Volume loss from Antarctic ice
shelves is accelerating, Science, 348, 327–331, 2015.
Parizek, B. R., Christianson, K., Anandakrishnan, S., Alley, R. B., Walker,
R. T., Edwards, R. A., Wolfe, D. S., Bertini, G. T., Rinehart, S. K.,
Bindschadler, R. A., and Nowicki, S. M. J.: Dynamic (in)stability of
Thwaites Glacier, West Antarctica: Thwaites Dynamics, J. Geophys. Res.-Earth, 118, 638–655, https://doi.org/10.1002/jgrf.20044, 2013.
Parkinson, C. L.: A 40-y record reveals gradual Antarctic sea ice increases
followed by decreases at rates far exceeding the rates seen in the Arctic,
P. Natl. Acad. Sci. USA, 116, 14414–14423,
https://doi.org/10.1073/pnas.1906556116, 2019.
Pattyn, F., Ritz, C., Hanna, E., Asay-Davis, X., DeConto, R., Durand, G.,
Favier, L., Fettweis, X., Goelzer, H., Golledge, N. R., Munneke, P. K.,
Lenaerts, J. T. M., Nowicki, S., Payne, A. J., Robinson, A., Seroussi, H.,
Trusel, L. D., and Broeke, M. van den: The Greenland and Antarctic ice
sheets under 1.5 ∘C global warming, Nat. Clim. Change, 1,
https://doi.org/10.1038/s41558-018-0305-8, 2018.
Pollard, D., DeConto, R. M., and Alley, R. B.: Potential Antarctic Ice Sheet
retreat driven by hydrofracturing and ice cliff failure, Earth Planet. Sc.
Lett., 412, 112–121, https://doi.org/10.1016/j.epsl.2014.12.035, 2015.
Rack, W. and Rott, H.: Pattern of retreat and disintegration of the Larsen B
ice shelf, Antarctic Peninsula, Ann. Glaciol., 39, 505–510, 2004.
Rankl, M., Fürst, J. J., Humbert, A., and Braun, M. H.: Dynamic changes on the Wilkins Ice Shelf during the 2006–2009 retreat derived from satellite observations, The Cryosphere, 11, 1199–1211, https://doi.org/10.5194/tc-11-1199-2017, 2017.
Rignot, E.: Ice-shelf changes in Pine Island Bay, Antarctica, 1947–2000, J.
Glaciol., 48, 247–256, https://doi.org/10.3189/172756502781831386, 2002.
Rignot, E., Mouginot, J., and Scheuchl, B.: Ice Flow of the Antarctic Ice
Sheet, Science, 333, 1427–1430, https://doi.org/10.1126/science.1208336,
2011.
Rignot, E., Jacobs, S., Mouginot, J., and Scheuchl, B.: Ice-Shelf Melting
Around Antarctica, Science, 341, 266–270,
https://doi.org/10.1126/science.1235798, 2013.
Rignot, E., Mouginot, J., Morlighem, M., Seroussi, H., and Scheuchl, B.:
Widespread, rapid grounding line retreat of Pine Island, Thwaites, Smith,
and Kohler glaciers, West Antarctica, from 1992 to 2011, Geophys. Res.
Lett., 41, 3502–3509, https://doi.org/10.1002/2014GL060140, 2014.
Rignot, E., Mouginot, J., Scheuchl, B., van den Broeke, M., van Wessem, M.
J., and Morlighem, M.: Four decades of Antarctic Ice Sheet mass balance from
1979–2017, P. Natl. Acad. Sci. USA, 116, 1095–1103,
https://doi.org/10.1073/pnas.1812883116, 2019.
Robel, A. A., Seroussi, H., and Roe, G. H.: Marine ice sheet instability
amplifies and skews uncertainty in projections of future sea-level rise,
P. Natl. Acad. Sci. USA, 116, 14887–14892,
https://doi.org/10.1073/pnas.1904822116, 2019.
Rosier, S. H. R., Green, J. A. M., Scourse, J. D., and Winkelmann, R.:
Modeling Antarctic tides in response to ice shelf thinning and retreat, J.
Geophys. Res.-Oceans, 119, 87–97, https://doi.org/10.1002/2013JC009240,
2014.
Rott, H., Müller, F., Nagler, T., and Floricioiu, D.: The imbalance of glaciers after disintegration of Larsen-B ice shelf, Antarctic Peninsula, The Cryosphere, 5, 125–134, https://doi.org/10.5194/tc-5-125-2011, 2011.
Royston, S. and Gudmundsson, G. H.: Changes in ice-shelf buttressing
following the collapse of Larsen A Ice Shelf, Antarctica, and the resulting
impact on tributaries, J. Glaciol., 62, 905–911, 2016.
Scambos, T. A., Hulbe, C., Fahnestock, M., and Bohlander, J.: The link
between climate warming and break-up of ice shelves in the Antarctic
Peninsula, J. Glaciol., 46, 516–530,
https://doi.org/10.3189/172756500781833043, 2000.
Scambos, T. A., Haran, T. M., Fahnestock, M. A., Painter, T. H., and
Bohlander, J.: MODIS-based Mosaic of Antarctica (MOA) data sets:
Continent-wide surface morphology and snow grain size, Remote Sens.
Environ., 111, 242–257, https://doi.org/10.1016/j.rse.2006.12.020, 2007.
Scambos, T. A., Fricker, H. A., Liu, C.-C., Bohlander, J., Fastook, J.,
Sargent, A., Massom, R., and Wu, A.-M.: Ice shelf disintegration by plate
bending and hydro-fracture: Satellite observations and model results of the
2008 Wilkins ice shelf break-ups, Earth Planet. Sc. Lett., 280, 51–60,
https://doi.org/10.1016/j.epsl.2008.12.027, 2009.
Scambos, T. A., Bell, R. E., Alley, R. B., Anandakrishnan, S., Bromwich, D. H., Brunt, K., Christianson, K., Creyts, T., Das, S. B., DeConto, R., Dutrieux, P., Fricker, H. A., Holland, D., MacGregor, J., Medley, B., Nicolas, J. P., Pollard, D., Siegfried, M. R., Smith, A. M., Steig, E. J., Trusel, L. D., Vaughan, D. G., and Yager, P. L.: How much, how fast?: A science review and outlook for research on the instability of Antarctica's Thwaites Glacier in the 21st century, Global Planet. Change, 153, 16–34, https://doi.org/10.1016/j.gloplacha.2017.04.008, 2017.
Scheuchl, B., Mouginot, J., Rignot, E., Morlighem, M., and Khazendar, A.:
Grounding line retreat of Pope, Smith, and Kohler Glaciers, West Antarctica,
measured with Sentinel-1a radar interferometry data, Geophys. Res. Lett.,
43, 8572–8579, https://doi.org/10.1002/2016GL069287, 2016.
Seehaus, T., Marinsek, S., Helm, V., Skvarca, P., and Braun, M.: Changes in
ice dynamics, elevation and mass discharge of
Dinsmoor–Bombardier–Edgeworth glacier system, Antarctic Peninsula, Earth
Planet. Sc. Lett., 427, 125–135,
https://doi.org/10.1016/j.epsl.2015.06.047, 2015.
Spence, P., Griffies, S. M., England, M. H., Hogg, A. McC., Saenko, O. A.,
and Jourdain, N. C.: Rapid subsurface warming and circulation changes of
Antarctic coastal waters by poleward shifting winds: Antarctic subsurface
ocean warming, Geophys. Res. Lett., 41, 4601–4610,
https://doi.org/10.1002/2014GL060613, 2014.
Stewart, A. L., Klocker, A., and Menemenlis, D.: Circum-Antarctic Shoreward
Heat Transport Derived From an Eddy- and Tide-Resolving Simulation, Geophys.
Res. Lett., 45, 834–845, https://doi.org/10.1002/2017GL075677, 2018.
Tedesco, M. and Monaghan, A. J.: An updated Antarctic melt record through
2009 and its linkages to high-latitude and tropical climate variability,
Geophys. Res. Lett., 36, L18502, https://doi.org/10.1029/2009GL039186, 2009.
Tetzner, D., Thomas, E., and Allen, C.: A Validation of ERA5 Reanalysis Data
in the Southern Antarctic Peninsula – Ellsworth Land Region, and Its
Implications for Ice Core Studies, Geosciences, 9, 289,
https://doi.org/10.3390/geosciences9070289, 2019.
Thoma, M., Jenkins, A., Holland, D., and Jacobs, S.: Modelling Circumpolar
Deep Water intrusions on the Amundsen Sea continental shelf, Antarctica,
Geophys. Res. Lett., 35, L18602, https://doi.org/10.1029/2008GL034939, 2008.
Trusel, L. D., Frey, K. E., Das, S. B., Munneke, P. K., and van den Broeke,
M. R.: Satellite-based estimates of Antarctic surface meltwater fluxes:
Satellite-Based Antarctic Melt Fluxes, Geophys. Res. Lett., 40, 6148–6153,
https://doi.org/10.1002/2013GL058138, 2013.
Vaughan, D. G. and Doake, C. S. M.: Recent atmospheric warming and retreat
of ice shelves on the Antarctic Peninsula, Nature, 379, 328–328, 1996.
Verdy, A., Marshall, J., and Czaja, A.: Sea surface temperature variability
along the path of the Antarctic Circumpolar Current, J. Phys. Oceanogr.,
36, 1317–1331, 2006.
Walker, C. C. and Gardner, A. S.: Rapid drawdown of Antarctica's Wordie Ice
Shelf glaciers in response to ENSO/Southern Annular Mode-driven warming in
the Southern Ocean, Earth Planet. Sc. Lett., 476, 100–110,
https://doi.org/10.1016/j.epsl.2017.08.005, 2017.
Walker, C. C., Bassis, J. N., Fricker, H. A., and Czerwinski, R. J.:
Structural and environmental controls on Antarctic ice shelf rift
propagation inferred from satellite monitoring: Antarctic Ice Shelf Rifting,
J. Geophys. Res.-Earth, 118, 2354–2364,
https://doi.org/10.1002/2013JF002742, 2013.
Walker, C. C., Gardner, A. S., Neumann, T., Fricker, H. A., Bassis, J. N.,
and Paolo, F. S.: Iceberg, right ahead!: The surprising and ongoing collapse
of an East Antarctic ice shelf in response to changes in the ocean
environment, in: AGU Fall Meeting Abstracts, C13A-06, 2019.
Wang, G., Cai, W., and Purich, A.: Trends in Southern Hemisphere wind-driven
circulation in CMIP5 models over the 21st century: Ozone recovery versus
greenhouse forcing, J. Geophys. Res.-Oceans, 119, 2974–2986,
https://doi.org/10.1002/2013JC009589, 2014.
Wessel, B., Huber, M., Wohlfart, C., Bertram, A., Osterkamp, N., Marschalk, U., Gruber, A., Reuß, F., Abdullahi, S., Georg, I., and Roth, A.: TanDEM-X PolarDEM 90 m of Antarctica: Generation and error characterization, The Cryosphere Discuss. [preprint], https://doi.org/10.5194/tc-2021-19, in review, 2021.
Wouters, B., Martin-Espanol, A., Helm, V., Flament, T., van Wessem, J. M.,
Ligtenberg, S. R. M., van den Broeke, M. R., and Bamber, J. L.: Dynamic
thinning of glaciers on the Southern Antarctic Peninsula, Science, 348,
899–903, https://doi.org/10.1126/science.aaa5727, 2015.
Wuite, J., Nagler, T., Gourmelen, N., Escorihuela, M. J., Hogg, A. E., and
Drinkwater, M. R.: Sub-Annual Calving Front Migration, Area Change and
Calving Rates from Swath Mode CryoSat-2 Altimetry, on Filchner-Ronne Ice
Shelf, Antarctica, Remote Sens., 11, 2761,
https://doi.org/10.3390/rs11232761, 2019.
Short summary
We present a record of circum-Antarctic glacier and ice shelf front change over the last two decades in combination with potential environmental variables forcing frontal retreat. Along the Antarctic coastline, glacier and ice shelf front retreat dominated between 1997–2008 and advance between 2009–2018. Decreasing sea ice days, intense snowmelt, weakening easterly winds, and relative changes in sea surface temperature were identified as enabling factors for glacier and ice shelf front retreat.
We present a record of circum-Antarctic glacier and ice shelf front change over the last two...
