Articles | Volume 17, issue 1
https://doi.org/10.5194/tc-17-445-2023
© Author(s) 2023. 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-17-445-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
| 
01 Feb 2023
Research article | Highlight paper |
| 01 Feb 2023
| 01 Feb 2023
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds
School of Geosciences, Edinburgh University, Edinburgh, EH8 9XP, UK
Department of Geography, Durham University, Durham, DH1 3LE, UK
Chris R. Stokes
Department of Geography, Durham University, Durham, DH1 3LE, UK
Adrian Jenkins
Department of Geography and Environmental Sciences, Northumbria
University, Newcastle upon Tyne, NE1 8ST, UK
Jim R. Jordan
Department of Geography and Environmental Sciences, Northumbria
University, Newcastle upon Tyne, NE1 8ST, UK
Laboratoire de Glaciologie, Université Libre de Bruxelles,
Brussels, Belgium
Stewart S. R. Jamieson
Department of Geography, Durham University, Durham, DH1 3LE, UK
G. Hilmar Gudmundsson
Department of Geography and Environmental Sciences, Northumbria
University, Newcastle upon Tyne, NE1 8ST, UK
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The Cryosphere, 19, 869–910, https://doi.org/10.5194/tc-19-869-2025, https://doi.org/10.5194/tc-19-869-2025, 2025
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Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2025-54, https://doi.org/10.5194/essd-2025-54, 2025
Revised manuscript under review for ESSD
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Brad Reed, J. A. Mattias Green, Adrian Jenkins, and G. Hilmar Gudmundsson
The Cryosphere, 18, 4567–4587, https://doi.org/10.5194/tc-18-4567-2024, https://doi.org/10.5194/tc-18-4567-2024, 2024
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Gong Cheng, Mathieu Morlighem, and G. Hilmar Gudmundsson
Geosci. Model Dev., 17, 6227–6247, https://doi.org/10.5194/gmd-17-6227-2024, https://doi.org/10.5194/gmd-17-6227-2024, 2024
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J. Rachel Carr, Emily A. Hill, and G. Hilmar Gudmundsson
The Cryosphere, 18, 2719–2737, https://doi.org/10.5194/tc-18-2719-2024, https://doi.org/10.5194/tc-18-2719-2024, 2024
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The Greenland Ice Sheet is one of the world's largest glaciers and is melting quickly in response to climate change. It contains fast-flowing channels of ice that move ice from Greenland's centre to its coasts and allow Greenland to react quickly to climate warming. As a result, we want to predict how these glaciers will behave in the future, but there are lots of uncertainties. Here we assess the impacts of two main sources of uncertainties in glacier models.
Cristina Gerli, Sebastian Rosier, G. Hilmar Gudmundsson, and Sainan Sun
The Cryosphere, 18, 2677–2689, https://doi.org/10.5194/tc-18-2677-2024, https://doi.org/10.5194/tc-18-2677-2024, 2024
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Charlotte M. Carter, Michael J. Bentley, Stewart S. R. Jamieson, Guy J. G. Paxman, Tom A. Jordan, Julien A. Bodart, Neil Ross, and Felipe Napoleoni
The Cryosphere, 18, 2277–2296, https://doi.org/10.5194/tc-18-2277-2024, https://doi.org/10.5194/tc-18-2277-2024, 2024
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We use radio-echo sounding data to investigate the presence of flat surfaces beneath the Evans–Rutford region in West Antarctica. These surfaces may be what remains of laterally continuous surfaces, formed before the inception of the West Antarctic Ice Sheet, and we assess two hypotheses for their formation. Tectonic structures in the region may have also had a control on the growth of the ice sheet by focusing ice flow into troughs adjoining these surfaces.
Edmund J. Lea, Stewart S. R. Jamieson, and Michael J. Bentley
The Cryosphere, 18, 1733–1751, https://doi.org/10.5194/tc-18-1733-2024, https://doi.org/10.5194/tc-18-1733-2024, 2024
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We use the ice surface expression of the Gamburtsev Subglacial Mountains in East Antarctica to map the horizontal pattern of valleys and ridges in finer detail than possible from previous methods. In upland areas, valleys are spaced much less than 5 km apart, with consequences for the distribution of melting at the bed and hence the likelihood of ancient ice being preserved. Automated mapping techniques were tested alongside manual approaches, with a hybrid approach recommended for future work.
Guy J. G. Paxman, Stewart S. R. Jamieson, Aisling M. Dolan, and Michael J. Bentley
The Cryosphere, 18, 1467–1493, https://doi.org/10.5194/tc-18-1467-2024, https://doi.org/10.5194/tc-18-1467-2024, 2024
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This study uses airborne radar data and satellite imagery to map mountainous topography hidden beneath the Greenland Ice Sheet. We find that the landscape records the former extent and configuration of ice masses that were restricted to areas of high topography. Computer models of ice flow indicate that valley glaciers eroded this landscape millions of years ago when local air temperatures were at least 4 °C higher than today and Greenland’s ice volume was < 10 % of that of the modern ice sheet.
Emily A. Hill, Benoît Urruty, Ronja Reese, Julius Garbe, Olivier Gagliardini, Gaël Durand, Fabien Gillet-Chaulet, G. Hilmar Gudmundsson, Ricarda Winkelmann, Mondher Chekki, David Chandler, and Petra M. Langebroek
The Cryosphere, 17, 3739–3759, https://doi.org/10.5194/tc-17-3739-2023, https://doi.org/10.5194/tc-17-3739-2023, 2023
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The grounding lines of the Antarctic Ice Sheet could enter phases of irreversible retreat or advance. We use three ice sheet models to show that the present-day locations of Antarctic grounding lines are reversible with respect to a small perturbation away from their current position. This indicates that present-day retreat of the grounding lines is not yet irreversible or self-enhancing.
Ronja Reese, Julius Garbe, Emily A. Hill, Benoît Urruty, Kaitlin A. Naughten, Olivier Gagliardini, Gaël Durand, Fabien Gillet-Chaulet, G. Hilmar Gudmundsson, David Chandler, Petra M. Langebroek, and Ricarda Winkelmann
The Cryosphere, 17, 3761–3783, https://doi.org/10.5194/tc-17-3761-2023, https://doi.org/10.5194/tc-17-3761-2023, 2023
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We use an ice sheet model to test where current climate conditions in Antarctica might lead. We find that present-day ocean and atmosphere conditions might commit an irreversible collapse of parts of West Antarctica which evolves over centuries to millennia. Importantly, this collapse is not irreversible yet.
Hannah J. Picton, Chris R. Stokes, Stewart S. R. Jamieson, Dana Floricioiu, and Lukas Krieger
The Cryosphere, 17, 3593–3616, https://doi.org/10.5194/tc-17-3593-2023, https://doi.org/10.5194/tc-17-3593-2023, 2023
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This study provides an overview of recent ice dynamics within Vincennes Bay, Wilkes Land, East Antarctica. This region was recently discovered to be vulnerable to intrusions of warm water capable of driving basal melt. Our results show extensive grounding-line retreat at Vanderford Glacier, estimated at 18.6 km between 1996 and 2020. This supports the notion that the warm water is able to access deep cavities below the Vanderford Ice Shelf, potentially making Vanderford Glacier unstable.
Alice C. Frémand, Peter Fretwell, Julien A. Bodart, Hamish D. Pritchard, Alan Aitken, Jonathan L. Bamber, Robin Bell, Cesidio Bianchi, Robert G. Bingham, Donald D. Blankenship, Gino Casassa, Ginny Catania, Knut Christianson, Howard Conway, Hugh F. J. Corr, Xiangbin Cui, Detlef Damaske, Volkmar Damm, Reinhard Drews, Graeme Eagles, Olaf Eisen, Hannes Eisermann, Fausto Ferraccioli, Elena Field, René Forsberg, Steven Franke, Shuji Fujita, Yonggyu Gim, Vikram Goel, Siva Prasad Gogineni, Jamin Greenbaum, Benjamin Hills, Richard C. A. Hindmarsh, Andrew O. Hoffman, Per Holmlund, Nicholas Holschuh, John W. Holt, Annika N. Horlings, Angelika Humbert, Robert W. Jacobel, Daniela Jansen, Adrian Jenkins, Wilfried Jokat, Tom Jordan, Edward King, Jack Kohler, William Krabill, Mette Kusk Gillespie, Kirsty Langley, Joohan Lee, German Leitchenkov, Carlton Leuschen, Bruce Luyendyk, Joseph MacGregor, Emma MacKie, Kenichi Matsuoka, Mathieu Morlighem, Jérémie Mouginot, Frank O. Nitsche, Yoshifumi Nogi, Ole A. Nost, John Paden, Frank Pattyn, Sergey V. Popov, Eric Rignot, David M. Rippin, Andrés Rivera, Jason Roberts, Neil Ross, Anotonia Ruppel, Dustin M. Schroeder, Martin J. Siegert, Andrew M. Smith, Daniel Steinhage, Michael Studinger, Bo Sun, Ignazio Tabacco, Kirsty Tinto, Stefano Urbini, David Vaughan, Brian C. Welch, Douglas S. Wilson, Duncan A. Young, and Achille Zirizzotti
Earth Syst. Sci. Data, 15, 2695–2710, https://doi.org/10.5194/essd-15-2695-2023, https://doi.org/10.5194/essd-15-2695-2023, 2023
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This paper presents the release of over 60 years of ice thickness, bed elevation, and surface elevation data acquired over Antarctica by the international community. These data are a crucial component of the Antarctic Bedmap initiative which aims to produce a new map and datasets of Antarctic ice thickness and bed topography for the international glaciology and geophysical community.
Michael J. Bentley, James A. Smith, Stewart S. R. Jamieson, Margaret R. Lindeman, Brice R. Rea, Angelika Humbert, Timothy P. Lane, Christopher M. Darvill, Jeremy M. Lloyd, Fiamma Straneo, Veit Helm, and David H. Roberts
The Cryosphere, 17, 1821–1837, https://doi.org/10.5194/tc-17-1821-2023, https://doi.org/10.5194/tc-17-1821-2023, 2023
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The Northeast Greenland Ice Stream is a major outlet of the Greenland Ice Sheet. Some of its outlet glaciers and ice shelves have been breaking up and retreating, with inflows of warm ocean water identified as the likely reason. Here we report direct measurements of warm ocean water in an unusual lake that is connected to the ocean beneath the ice shelf in front of the 79° N Glacier. This glacier has not yet shown much retreat, but the presence of warm water makes future retreat more likely.
James A. Smith, Louise Callard, Michael J. Bentley, Stewart S. R. Jamieson, Maria Luisa Sánchez-Montes, Timothy P. Lane, Jeremy M. Lloyd, Erin L. McClymont, Christopher M. Darvill, Brice R. Rea, Colm O'Cofaigh, Pauline Gulliver, Werner Ehrmann, Richard S. Jones, and David H. Roberts
The Cryosphere, 17, 1247–1270, https://doi.org/10.5194/tc-17-1247-2023, https://doi.org/10.5194/tc-17-1247-2023, 2023
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The Greenland Ice Sheet is melting at an accelerating rate. To understand the significance of these changes we reconstruct the history of one of its fringing ice shelves, known as 79° N ice shelf. We show that the ice shelf disappeared 8500 years ago, following a period of enhanced warming. An important implication of our study is that 79° N ice shelf is susceptible to collapse when atmospheric and ocean temperatures are ~2°C warmer than present, which could occur by the middle of this century.
Sebastian H. R. Rosier, Christopher Y. S. Bull, Wai L. Woo, and G. Hilmar Gudmundsson
The Cryosphere, 17, 499–518, https://doi.org/10.5194/tc-17-499-2023, https://doi.org/10.5194/tc-17-499-2023, 2023
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Future ice loss from Antarctica could raise sea levels by several metres, and key to this is the rate at which the ocean melts the ice sheet from below. Existing methods for modelling this process are either computationally expensive or very simplified. We present a new approach using machine learning to mimic the melt rates calculated by an ocean model but in a fraction of the time. This approach may provide a powerful alternative to existing methods, without compromising on accuracy or speed.
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.
Clara Burgard, Nicolas C. Jourdain, Ronja Reese, Adrian Jenkins, and Pierre Mathiot
The Cryosphere, 16, 4931–4975, https://doi.org/10.5194/tc-16-4931-2022, https://doi.org/10.5194/tc-16-4931-2022, 2022
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The ocean-induced melt at the base of the floating ice shelves around Antarctica is one of the largest uncertainty factors in the Antarctic contribution to future sea-level rise. We assess the performance of several existing parameterisations in simulating basal melt rates on a circum-Antarctic scale, using an ocean simulation resolving the cavities below the shelves as our reference. We find that the simple quadratic slope-independent and plume parameterisations yield the best compromise.
Jowan M. Barnes and G. Hilmar Gudmundsson
The Cryosphere, 16, 4291–4304, https://doi.org/10.5194/tc-16-4291-2022, https://doi.org/10.5194/tc-16-4291-2022, 2022
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Models must represent how glaciers slide along the bed, but there are many ways to do so. In this paper, several sliding laws are tested and found to affect different regions of the Antarctic Ice Sheet in different ways and at different speeds. However, the variability in ice volume loss due to sliding-law choices is low compared to other factors, so limited empirical knowledge of sliding does not prevent us from making predictions of how an ice sheet will evolve.
Antony Siahaan, Robin S. Smith, Paul R. Holland, Adrian Jenkins, Jonathan M. Gregory, Victoria Lee, Pierre Mathiot, Antony J. Payne, Jeff K. Ridley, and Colin G. Jones
The Cryosphere, 16, 4053–4086, https://doi.org/10.5194/tc-16-4053-2022, https://doi.org/10.5194/tc-16-4053-2022, 2022
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The UK Earth System Model is the first to fully include interactions of the atmosphere and ocean with the Antarctic Ice Sheet. Under the low-greenhouse-gas SSP1–1.9 (Shared Socioeconomic Pathway) scenario, the ice sheet remains stable over the 21st century. Under the strong-greenhouse-gas SSP5–8.5 scenario, the model predicts strong increases in melting of large ice shelves and snow accumulation on the surface. The dominance of accumulation leads to a sea level fall at the end of the century.
Tom Mitcham, G. Hilmar Gudmundsson, and Jonathan L. Bamber
The Cryosphere, 16, 883–901, https://doi.org/10.5194/tc-16-883-2022, https://doi.org/10.5194/tc-16-883-2022, 2022
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We modelled the response of the Larsen C Ice Shelf (LCIS) and its tributary glaciers to the calving of the A68 iceberg and validated our results with observations. We found that the impact was limited, confirming that mostly passive ice was calved. Through further calving experiments we quantified the total buttressing provided by the LCIS and found that over 80 % of the buttressing capacity is generated in the first 5 km of the ice shelf downstream of the grounding line.
Erin L. McClymont, Michael J. Bentley, Dominic A. Hodgson, Charlotte L. Spencer-Jones, Thomas Wardley, Martin D. West, Ian W. Croudace, Sonja Berg, Darren R. Gröcke, Gerhard Kuhn, Stewart S. R. Jamieson, Louise Sime, and Richard A. Phillips
Clim. Past, 18, 381–403, https://doi.org/10.5194/cp-18-381-2022, https://doi.org/10.5194/cp-18-381-2022, 2022
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Sea ice is important for our climate system and for the unique ecosystems it supports. We present a novel way to understand past Antarctic sea-ice ecosystems: using the regurgitated stomach contents of snow petrels, which nest above the ice sheet but feed in the sea ice. During a time when sea ice was more extensive than today (24 000–30 000 years ago), we show that snow petrel diet had varying contributions of fish and krill, which we interpret to show changing sea-ice distribution.
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.
Melanie Marochov, Chris R. Stokes, and Patrice E. Carbonneau
The Cryosphere, 15, 5041–5059, https://doi.org/10.5194/tc-15-5041-2021, https://doi.org/10.5194/tc-15-5041-2021, 2021
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Research into the use of deep learning for pixel-level classification of landscapes containing marine-terminating glaciers is lacking. We adapt a novel and transferable deep learning workflow to classify satellite imagery containing marine-terminating outlet glaciers in Greenland. Our workflow achieves high accuracy and mimics human visual performance, potentially providing a useful tool to monitor glacier change and further understand the impacts of climate change in complex glacial settings.
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.
Jowan M. Barnes, Thiago Dias dos Santos, Daniel Goldberg, G. Hilmar Gudmundsson, Mathieu Morlighem, and Jan De Rydt
The Cryosphere, 15, 1975–2000, https://doi.org/10.5194/tc-15-1975-2021, https://doi.org/10.5194/tc-15-1975-2021, 2021
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Some properties of ice flow models must be initialised using observed data before they can be used to produce reliable predictions of the future. Different models have different ways of doing this, and the process is generally seen as being specific to an individual model. We compare the methods used by three different models and show that they produce similar outputs. We also demonstrate that the outputs from one model can be used in other models without introducing large uncertainties.
Sebastian H. R. Rosier, Ronja Reese, Jonathan F. Donges, Jan De Rydt, G. Hilmar Gudmundsson, and Ricarda Winkelmann
The Cryosphere, 15, 1501–1516, https://doi.org/10.5194/tc-15-1501-2021, https://doi.org/10.5194/tc-15-1501-2021, 2021
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Pine Island Glacier has contributed more to sea-level rise over the past decades than any other glacier in Antarctica. Ice-flow modelling studies have shown that it can undergo periods of rapid mass loss, but no study has shown that these future changes could cross a tipping point and therefore be effectively irreversible. Here, we assess the stability of Pine Island Glacier, quantifying the changes in ocean temperatures required to cross future tipping points using statistical methods.
Bertie W. J. Miles, Jim R. Jordan, Chris R. Stokes, Stewart S. R. Jamieson, G. Hilmar Gudmundsson, and Adrian Jenkins
The Cryosphere, 15, 663–676, https://doi.org/10.5194/tc-15-663-2021, https://doi.org/10.5194/tc-15-663-2021, 2021
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We provide a historical overview of changes in Denman Glacier's flow speed, structure and calving events since the 1960s. Based on these observations, we perform a series of numerical modelling experiments to determine the likely cause of Denman's acceleration since the 1970s. We show that grounding line retreat, ice shelf thinning and the detachment of Denman's ice tongue from a pinning point are the most likely causes of the observed acceleration.
Jan De Rydt, Ronja Reese, Fernando S. Paolo, and G. Hilmar Gudmundsson
The Cryosphere, 15, 113–132, https://doi.org/10.5194/tc-15-113-2021, https://doi.org/10.5194/tc-15-113-2021, 2021
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We used satellite observations and numerical simulations of Pine Island Glacier, West Antarctica, between 1996 and 2016 to show that the recent increase in its flow speed can only be reproduced by computer models if stringent assumptions are made about the material properties of the ice and its underlying bed. These assumptions are not commonly adopted in ice flow modelling, and our results therefore have implications for future simulations of Antarctic ice flow and sea level projections.
Kate Winter, Emily A. Hill, G. Hilmar Gudmundsson, and John Woodward
Earth Syst. Sci. Data, 12, 3453–3467, https://doi.org/10.5194/essd-12-3453-2020, https://doi.org/10.5194/essd-12-3453-2020, 2020
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Satellite measurements of the English Coast in the Antarctic Peninsula reveal that glaciers are thinning and losing mass, but ice thickness data are required to assess these changes, in terms of ice flux and sea level contribution. Our ice-penetrating radar measurements reveal that low-elevation subglacial channels control fast-flowing ice streams, which release over 39 Gt of ice per year to floating ice shelves. This topography could make ice flows susceptible to future instability.
Felipe Napoleoni, Stewart S. R. Jamieson, Neil Ross, Michael J. Bentley, Andrés Rivera, Andrew M. Smith, Martin J. Siegert, Guy J. G. Paxman, Guisella Gacitúa, José A. Uribe, Rodrigo Zamora, Alex M. Brisbourne, and David G. Vaughan
The Cryosphere, 14, 4507–4524, https://doi.org/10.5194/tc-14-4507-2020, https://doi.org/10.5194/tc-14-4507-2020, 2020
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Subglacial water is important for ice sheet dynamics and stability. Despite this, there is a lack of detailed subglacial-water characterisation in West Antarctica (WA). We report 33 new subglacial lakes. Additionally, a new digital elevation model of basal topography was built and used to simulate the subglacial hydrological network in WA. The simulated subglacial hydrological catchments of Pine Island and Thwaites glaciers do not match precisely with their ice surface catchments.
Jennifer F. Arthur, Chris R. Stokes, Stewart S. R. Jamieson, J. Rachel Carr, and Amber A. Leeson
The Cryosphere, 14, 4103–4120, https://doi.org/10.5194/tc-14-4103-2020, https://doi.org/10.5194/tc-14-4103-2020, 2020
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Surface meltwater lakes can flex and fracture ice shelves, potentially leading to ice shelf break-up. A long-term record of lake evolution on Shackleton Ice Shelf is produced using optical satellite imagery and compared to surface air temperature and modelled surface melt. The results reveal that lake clustering on the ice shelf is linked to melt-enhancing feedbacks. Peaks in total lake area and volume closely correspond with intense snowmelt events rather than with warmer seasonal temperatures.
Cited articles
Aoki, S.: Breakup of land-fast sea ice in Lützow-Holm Bay, East
Antarctica, and its teleconnection to tropical Pacific sea surface
temperatures, Geophys. Res. Lett., 44, 3219–3227,
https://doi.org/10.1002/2017GL072835, 2017.
Aoki, S., Ozawa, T., and Doi, K.: GPS observation of the sea level variation
in Lützow-Holm Bay, Antarctica, Geophys. Res. Lett., 27, 2285–2288, https://doi.org/10.1029/1999GL011304, 2000.
Aoyama, Y., Doi, K., Shibuya, K., Ohta, H., and Tsuwa, I.: Near real-time
monitoring of flow velocity and direction in the floating ice tongue of the
Shirase Glacier using low-cost GPS buoys, Earth Planet. Space, 65, 103–108, https://doi.org/10.5047/EPS.2012.06.011, 2013.
Boening, C., Lebsock, M., Landerer, F., and Stephens, G.: Snowfall-driven
mass change on the East Antarctic ice sheet, Geophys. Res. Lett., 39, L21501,
https://doi.org/10.1029/2012GL053316, 2012.
Bracegirdle, T. J., Hyder, P., and Holmes, C. R.: CMIP5 Diversity in
Southern Westerly Jet Projections Related to Historical Sea Ice Area: Strong
Link to Strengthening and Weak Link to Shift, J. Climate, 31, 195–211,
https://doi.org/10.1175/JCLI-D-17-0320.1, 2018.
Brunt, K. M., Fricker, H. A., Padman, L., Scambos, T. A., and O'Neel, S.:
Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat
laser altimetry, Ann. Glaciol., 51, 71–79,
https://doi.org/10.3189/172756410791392790, 2010.
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., and Holland,
D. M.: Sensitivity of Pine Island Glacier to observed ocean forcing,
Geophys. Res. Lett., 43, 10817–10825, https://doi.org/10.1002/2016gl070500,
2016.
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.
Durand, G., Gillet-Chaulet, F., Gagliardini, O., and Fürst, J. J.: SUMER
Antarctic Ice-shelf Buttressing, Version 1. Boulder, Colorado USA, NASA
National Snow and Ice Data Center Distributed Active Archive Center [data set],
https://doi.org/10.5067/FWHORAYVZCE7, 2016.
Fahnestock, M., Scambos, T., Moon, T., Gardner, A., Haran, T., and Klinger,
M.: Rapid large-area mapping of ice flow using Landsat 8, Remote Sens. Environ., 185, 84–94,
https://doi.org/10.1016/J.RSE.2015.11.023, 2016.
Fricker, H. A., Coleman, R., Padman, L., Scambos, T. A., Bohlander, J., and
Brunt, K. M.: Mapping the grounding zone of the Amery Ice Shelf, East
Antarctica using InSAR, MODIS and ICESat, Antarct. Sci., 21,
515–532, https://doi.org/10.1017/S095410200999023X, 2009.
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, https://doi.org/10.1038/nclimate2912, 2016.
Gardner, A., Fahnestock, M., and Scambos, T. A.: ITS_LIVE
Regional Glacier and Ice Sheet Surface Velocities, NASA National Snow and Ice Data Center Distributed Active Archive Center [data set],
https://doi.org/10.5067/6II6VW8LLWJ7, 2020.
Gardner, A., Fahnestock, M., and Scambos, T.: MEaSUREs ITS_LIVE Landsat Image-Pair Glacier and Ice Sheet Surface Velocities, Version 1, Boulder, Colorado USA, NASA National Snow and Ice Data Center Distributed Active Archive Center [data set], https://doi.org/10.5067/IMR9D3PEI28U, 2022.
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.
Greene, C. A., Blankenship, D. D., Gwyther, D. E., Silvano, A., and van
Wijk, E.: Wind causes Totten Ice Shelf melt and acceleration, Sci. Adv., 3,
e1701681–e1701681, https://doi.org/10.1126/sciadv.1701681,
2017.
Haran, T., Bohlander, J., Scambos, T., Painter, T., and Fahnestock, M.: MODIS
Mosaic of Antarctica 2008–2009 (MOA2009) Image Map, Version 2. Boulder,
Colorado USA, NASA National Snow and Ice Data Center Distributed Active
Archive Center [data set], https://doi.org/10.5067/4ZL43A4619AF, 2019.
Haran, T., Bohlander, J., Scambos, T., Painter, T., and Fahnestock, M.: MODIS Mosaic of Antarctica 2008–2009 (MOA2009) Image Map, Version 2, Boulder, Colorado USA, NASA National Snow and Ice Data Center Distributed Active Archive Center [data set], https://doi.org/10.5067/4ZL43A4619AF, 2021.
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.
Heid, T. and Kääb, A.: Evaluation of existing image matching
methods for deriving glacier surface displacements globally from optical
satellite imagery, Remote Sens. Environ., 118, 339–355,
https://doi.org/10.1016/J.RSE.2011.11.024, 2012.
Hersbach, H., Bell, B., Berrisford, P., Biavati, G., Horányi, A., Muñoz Sabater, J., Nicolas, J., Peubey, C., Radu, R., Rozum, I., Schepers, D., Simmons, A., Soci, C., Dee, D., and Thépaut, J.-N.: ERA5 hourly data on single levels from 1959 to present, Copernicus Climate Change Service (C3S) Climate Data Store (CDS) [data set], https://doi.org/10.24381/cds.adbb2d47, 2018.
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., De 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., de Rosnay,
P., Rozum, I., Vamborg, F., Villaume, S., and Thépaut, J.-N.: The ERA5
global reanalysis, Q. J. Roy. Meteorol. Soc., 146, 1999–2049,
https://doi.org/10.1002/qj.3803, 2020.
Hirano, D., Tamura, T., Kusahara, K., Ohshima, K. I., Nicholls, K. W.,
Ushio, S., Simizu, D., Ono, K., Fujii, M., Nogi, Y., and Aoki, S.: Strong
ice-ocean interaction beneath Shirase Glacier Tongue in East Antarctica,
Nat. Commun., 11, 4221, https://doi.org/10.1038/s41467-020-17527-4, 2020.
Holland, P. R., Bracegirdle, T. J., Dutrieux, P., Jenkins, A., and Steig,
E. J.: West Antarctic ice loss influenced by internal climate
variability and anthropogenic forcing, Nat. Geosci., 12, 718–724,
https://doi.org/10.1038/s41561-019-0420-9, 2019.
Howat, I. M., Porter, C., Smith, B. E., Noh, M.-J., and Morin, P.: The Reference Elevation Model of Antarctica, The Cryosphere, 13, 665–674, https://doi.org/10.5194/tc-13-665-2019, 2019.
Howat, I., Porter, C., Noh, M.-J., Husby, E., Khuvis, S., Danish, E., Tomko, K., Gardiner, J., Negrete, A., Yadav, B., Klassen, J., Kelleher, C., Cloutier, M., Bakker, J., Enos, J., Arnold, G., Bauer, G., and Morin, P.: The Reference Elevation Model of Antarctica – Strips, Version 4.1, Harvard Dataverse, V1 [data set], https://doi.org/10.7910/DVN/X7NDNY, 2022.
Jacobs, S. S., Helmer, H. H., Doake, C. S. M., Jenkins, A., and Frolich, R.
M.: Melting of ice shelves and the mass balance of Antarctica, J. Glaciol., 38,
375–387, https://doi.org/10.3189/S0022143000002252, 1992.
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., Curlander, J. C., Carsey, F., Wales, C., and Barry, R. G.: RAMP
AMM-1 SAR Image Mosaic of Antarctica, Version 2. Boulder, Colorado USA, NASA
National Snow and Ice Data Center Distributed Active Archive Center [data set],
https://doi.org/10.5067/8AF4ZRPULS4H, 2013.
Kameda, T., Nakawo, M., Mae, S., Watanabe, O., and Naruse, R.: Thinning of
the Ice Sheet Estimated from Total Gas Content of Ice Cores in Mizuho
Plateau, East Antarctica, Ann. Glaciol., 14, 131–135,
https://doi.org/10.3189/S0260305500008429, 1990.
Kittel, C.: Kittel et al. (2021), The Cryosphere: MAR and ESMs data, Zenodo [data set], https://doi.org/10.5281/zenodo.4459259, 2021.
Kittel, C., Amory, C., Agosta, C., Jourdain, N. C., Hofer, S., Delhasse, A., Doutreloup, S., Huot, P.-V., Lang, C., Fichefet, T., and Fettweis, X.: Diverging future surface mass balance between the Antarctic ice shelves and grounded ice sheet, The Cryosphere, 15, 1215–1236, https://doi.org/10.5194/tc-15-1215-2021, 2021.
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, 258–262,
https://doi.org/10.1038/s41561-018-0082-z, 2018.
Korona, J., Berthier, E., Bernard, M., Rémy, F., and Thouvenot, E.: ISPRS
Journal of Photogrammetry and Remote Sensing SPIRIT, SPOT 5 stereoscopic
survey of Polar Ice: reference images and topographies during the fourth
International Polar Year (2007–2009), ISPRS J. Photogramm., 64, 204–212, https://doi.org/10.1016/j.isprsjprs.2008.10.005, 2009 (data available at: https://theia.cnes.fr/atdistrib/rocket/#/search?collection=Spirit, last access: 1 July 2022).
Kusahara, K., Hirano, D., Fujii, M., Fraser, A. D., and Tamura, T.: Modeling intensive ocean–cryosphere interactions in Lützow-Holm Bay, East Antarctica, The Cryosphere, 15, 1697–1717, https://doi.org/10.5194/tc-15-1697-2021, 2021a.
Kusahara, K., Hirano, D., Fujii, M., Fraser, A., and Tamura, T.: “Data for 'Modeling intensive ocean-cyrosphere interactions in Lützow-Holm Bay, East Antarctica”', Mendeley Data V1, [data set], https://doi.org/10.17632/z6w4xd6s3s.1, 2021b.
Lenaerts, J. T. M., van Meijgaard, E., van den Broeke, M. R., Ligtenberg, S.
R. M., Horwath, M., and Isaksson, E.: Recent snowfall anomalies in Dronning
Maud Land, East Antarctica, in a historical and future climate perspective,
Geophys. Res. Lett., 40, 2684–2688, https://doi.org/10.1002/GRL.50559, 2013.
Leprince, S., Ayoub, F., Klinger, Y., and Avouac, J.-P.: Co-Registration of Optically Sensed Images and Correlation (COSI-Corr): an Operational Methodology for Ground Deformation Measurements, Igarss: 2007
Ieee International Geoscience and Remote Sensing Symposium,
1–12, 1943–1946, https://doi.org/10.1109/Igarss.2007.4423207,
2007 (data available at: http://www.tectonics.caltech.edu/slip_history/spot_coseis/download_software.html, last access: 1 April 2022).
Ligtenberg, S. R. M., van de Berg, W. J., van den Broeke, M. R., Rae, J. G.
L., and van Meijgaard, E.: Future surface mass balance of the Antarctic ice
sheet and its influence on sea level change, simulated by a regional
atmospheric climate model, Clim. Dynam., 41, 867–884,
https://doi.org/10.1007/S00382-013-1749-1, 2013.
Mae, S. and Naruse, R.: Possible causes of ice sheet thinning in the
Mizuho Plateau, Nature, 273, 291–292,
https://doi.org/10.1038/273291a0, 1978.
Marshall, G.: Trends in the Southern Annular Mode from observations and
reanalyses, J. Climate, 16, 4134–4143, 2003.
Miles, B. W. J. J., Stokes, C. R., Jenkins, A., Jordan, J. R., Jamieson, S.
S. R. R., and Gudmundsson, G. H.: Intermittent structural weakening and
acceleration of the Thwaites Glacier Tongue between 2000 and 2018, J. Glaciol., 66, 485–495,
https://doi.org/10.1017/jog.2020.20, 2020.
Moriwaki, K. and Yoshida, Y.: Submarine topography of Lützow-Holm Bay,
Antarctica, Mem. Natl. Inst. Polar Res., 28, 247–258, 1983.
Morlighem, M.: MEaSUREs BedMachine Antarctica, Version 2, Boulder, Colorado
USA, NASA National Snow and Ice Data Center Distributed Active Archive
Center [data set], https://doi.org/10.5067/E1QL9HFQ7A8M, 2020.
Morlighem, M., Rignot, E., Binder, T., Blankenship, D., Drews, R., Eagles,
G., Eisen, O., Ferraccioli, F., Forsberg, R., Fretwell, P., Goel, V.,
Greenbaum, J. S., Gudmundsson, H., Guo, J., Helm, V., Hofstede, C., Howat,
I., Humbert, A., Jokat, W., Karlsson, N. B., Lee, W. S., Matsuoka, K.,
Millan, R., Mouginot, J., Paden, J., Pattyn, F., Roberts, J., Rosier, S.,
Ruppel, A., Seroussi, H., Smith, E. C., Steinhage, D., Sun, B., van den
Broeke, M. R., van Ommen, T. D., van Wessem, M., and Young, D. A.: Deep
glacial troughs and stabilizing ridges unveiled beneath the margins of the
Antarctic ice sheet, Nat. Geosci., 13, 132–137,
https://doi.org/10.1038/s41561-019-0510-8, 2020.
Mouginot, J., Rignot, E., and Scheuchl, B.: Sustained increase in ice
discharge from the Amundsen Sea Embayment, West Antarctica, from 1973 to
2013, Geophys. Res. Lett., 41, 1576–1584, https://doi.org/10.1002/2013GL059069, 2014.
Nakamura, K., Doi, K., and Shibuya, K.: Estimation of seasonal changes in
the flow of Shirase Glacier using JERS-1/SAR image correlation, Polar Sci., 1,
73–83, https://doi.org/10.1016/J.POLAR.2007.09.002, 2007.
Nakamura, K., Doi, K., and Shibuya, K.: Fluctuations in the flow velocity
of the Antarctic Shirase Glacier over an 11-year period, Polar Sci., 4, 443–455,
https://doi.org/10.1016/J.POLAR.2010.04.010, 2010.
Nakamura, K., Aoki, S., Yamanokuchi, T., and Tamura, T.: Interactive
movements of outlet glacier tongue and landfast sea ice in Lützow-Holm
Bay, East Antarctica, detected by ALOS-2/PALSAR-2 imagery, Sci. Remote
Sens., 6, 100064, https://doi.org/10.1016/j.srs.2022.100064,
2022.
Naruse, R.: Thinning of the Ice Sheet in Mizuho Plateau, East Antarctica,
J. Glaciol., 24, 45–52, https://doi.org/10.3189/S0022143000014635,
1979.
NASA: Worldview, https://worldview.earthdata.nasa.gov, last access: 20 October 2022.
Nishio, F., Mae, S., Ohmae, H., Takahashi, S., Nakawo, M., and Kawada, K.:
Dynamical behaviour of the ice sheet in Mizuho Plateau, East Antarctica,
Proc. NIPR Symp. Polar Meteorol. Glaciol., 2, 97–104, 1989.
Ohshima, K. I., Takizawa, T., Ushio, S., and Kawamura, T.: Seasonal
variations of the Antarctic coastal ocean in the vicinity of Lützow-Holm
Bay, J. Geophys. Res.-Oceans, 101, 20617–20628, https://doi.org/10.1029/96JC01752,
1996.
Pattyn, F. and Derauw, D.: Ice-dynamic conditions of Shirase Glacier,
Antarctica, inferred from ERS SAR interferometry, J. Glaciol., 48, 559–565,
https://doi.org/10.3189/172756502781831115, 2002.
Pattyn, F. and Naruse, R.: The nature of complex ice flow in Shirase
Glacier catchment, East Antarctica, J. Glaciol., 49, 429–436, https://doi.org/10.3189/172756503781830610, 2003.
Perren, B. B., Hodgson, D. A., Roberts, S. J., Sime, L., van Nieuwenhuyze,
W., Verleyen, E., and Vyverman, W.: Southward migration of the Southern
Hemisphere westerly winds corresponds with warming climate over centennial
timescales, Commun. Earth Environ., 1, 1–8,
https://doi.org/10.1038/s43247-020-00059-6, 2020.
Reese, R., Gudmundsson, G. H., Levermann, A., and Winkelmann, R.: The far
reach of ice-shelf thinning in Antarctica, Nat. Clim. Change, 8, 53–57, https://doi.org/10.1038/s41558-017-0020-x, 2018.
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, 16, 1095–1103, https://doi.org/10.1073/pnas.1812883116, 2019.
Rintoul, S. R., Silvano, A., Pena-Molino, B., van Wijk, E., Rosenberg, M.,
Greenbaum, J. S., and Blankenship, D. D.: Ocean heat drives rapid basal
melt of the Totten ice shelf, Sci. Adv., 2, e1601610,
https://doi.org/10.1126/sciadv.1601610, 2016.
Scambos, T., Fahnestock, M., Moon, T., Gardner, A., and Klinger, M.: Global Land Ice Velocity Extraction from Landsat 8 (GoLIVE), Version 1, Boulder, Colorado USA, National Snow and Ice Data Center [data set], https://doi.org/10.7265/N5ZP442B, 2016.
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.
Scherler, D., Leprince, S., and Strecker, M. R.: Glacier-surface velocities
in alpine terrain from optical satellite imagery – Accuracy improvement and
quality assessment, Remote Sens. Environ., 112, 3806–3819,
https://doi.org/10.1016/J.RSE.2008.05.018, 2008.
Schröder, L., Horwath, M., Dietrich, R., Helm, V., van den Broeke, M. R., and Ligtenberg, S. R. M.: Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry, The Cryosphere, 13, 427–449, https://doi.org/10.5194/tc-13-427-2019, 2019.
Smith, B., Fricker, H. A., Gardner, A. S., Medley, B., Nilsson, J., Paolo,
F. S., Holschuh, N., Adusumilli, S., Brunt, K., Csatho, B., Harbeck, K.,
Markus, T., Neumann, T., Siegfried, M. R., and Zwally, H. J.: Pervasive ice
sheet mass loss reflects competing ocean and atmosphere processes, Science,
368, 1239–1242, https://doi.org/10.1126/science.aaz5845, 2020 (data available at: http://hdl.handle.net/1773/45388, last access: April 2022).
Sproson, A. D., Takano, Y., Miyairi, Y., Aze, T., Matsuzaki, H., Ohkouchi,
N., and Yokoyama, Y.: Beryllium isotopes in sediments from Lake Maruwan
Oike and Lake Skallen, East Antarctica, reveal substantial glacial discharge
during the late Holocene, Quaternary Sci. Rev., 256, 106841,
https://doi.org/10.1016/J.QUASCIREV.2021.106841, 2021.
Stokes, C. R., Abram, N. J., Bentley, M. J., Edwards, T. L., England, M. H.,
Foppert, A., Jamieson, S. S. R., Jones, R. S., King, M. A., Lenaerts, J. T.
M., Medley, B., Miles, B. W. J., Paxman, G. J. G., Ritz, C., van de Flierdt,
T., and Whitehouse, P. L.: Response of the East Antarctic Ice Sheet to past
and future climate change, Nature, 608, 275–286,
https://doi.org/10.1038/s41586-022-04946-0, 2022.
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.
Thompson, D. W. J. and Solomon, S.: Interpretation of recent Southern
Hemisphere climate change, Science, 296, 895–899,
https://doi.org/10.1126/science.1069270, 2002.
Thompson, D. W. J., Solomon, S., Kushner, P. J., England, M. H., Grise, K.
M., and Karoly, D. J.: Signatures of the Antarctic ozone hole in Southern
Hemisphere surface climate change, Nat. Geosci., 4, 741–749,
https://doi.org/10.1038/ngeo1296, 2011.
Toh, H. and Shibuya, K.: Thinning rate of ice sheet on Mizuho Plateau, East
Antarctica, determined by GPS differential positioning, in: Recent progress in Antarctic earth
sciences, edited by: Yoshida, Y.,
Kaminuma, K., and Shiraishi, K., Tokyo, Terra Scientific Publishing Co., 579–583, 1992.
Turner, J.: Antarctic climate change during the last 50 years, Int. J. Climatol., 25, 279–294,
2005.
USGS: EarthExplorer, https://earthexplorer.usgs.gov/, last access: 20 October 2022.
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.
Yin, J. H.: A consistent poleward shift of the storm tracks in simulations
of 21st century climate, Geophys. Res. Lett., 32, L18701,
https://doi.org/10.1029/2005gl023684, 2005.
Co-editor-in-chief
The study shows a rare example of the thickening of a glacier ice tongue in East Antarctica. The authors attribute the thickening to changes in wind patterns leading to a decrease in the transport of warm water reaching the glacier. The results highlight the intricate relationship between glaciers and atmosphere/ocean dynamics.
The study shows a rare example of the thickening of a glacier ice tongue in East Antarctica. The...
Short summary
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.
Satellite observations have shown that the Shirase Glacier catchment in East Antarctica has been...
