Articles | Volume 10, issue 2
https://doi.org/10.5194/tc-10-639-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/tc-10-639-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
16 Mar 2016
Research article |
| 16 Mar 2016
Numerical simulations of the Cordilleran ice sheet through the last glacial cycle
Julien Seguinot
CORRESPONDING AUTHOR
Laboratory of Hydraulics, Hydrology and Glaciology, ETH Zürich, Zürich, Switzerland
Department of Physical Geography and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany
Irina Rogozhina
Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany
Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
Arjen P. Stroeven
Department of Physical Geography and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Martin Margold
Department of Physical Geography and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Johan Kleman
Department of Physical Geography and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
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About 25 000 years ago, Alpine glaciers filled most of the valleys and even extended onto the plains. In this study, with help from traces left by glaciers on the landscape, we use a computer model that contains knowledge of glacier physics based on modern observations of Greenland and Antarctica and laboratory experiments on ice, and one of the fastest computers in the world, to attempt a reconstruction of the evolution of Alpine glaciers through time from 120 000 years ago to today.
Guillaume Jouvet, Yvo Weidmann, Julien Seguinot, Martin Funk, Takahiro Abe, Daiki Sakakibara, Hakime Seddik, and Shin Sugiyama
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Short summary
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J. Seguinot, C. Khroulev, I. Rogozhina, A. P. Stroeven, and Q. Zhang
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J. Kleman, J. Fastook, K. Ebert, J. Nilsson, and R. Caballero
Clim. Past, 9, 2365–2378, https://doi.org/10.5194/cp-9-2365-2013, https://doi.org/10.5194/cp-9-2365-2013, 2013
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The friction underneath ice sheets can be inferred from observed velocity at the top, but this inference requires smoothing. The selection of smoothing has been highly variable in the literature. Here we show how to rigorously select the best smoothing, and we show that the inferred friction converges towards the best knowable field as model resolution improves. We use this to learn about the best description of basal friction and to formulate recommended best practices for other modelers.
Oliver G. Pollard, Natasha L. M. Barlow, Lauren J. Gregoire, Natalya Gomez, Víctor Cartelle, Jeremy C. Ely, and Lachlan C. Astfalck
The Cryosphere, 17, 4751–4777, https://doi.org/10.5194/tc-17-4751-2023, https://doi.org/10.5194/tc-17-4751-2023, 2023
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We use advanced statistical techniques and a simple ice-sheet model to produce an ensemble of plausible 3D shapes of the ice sheet that once stretched across northern Europe during the previous glacial maximum (140,000 years ago). This new reconstruction, equivalent in volume to 48 ± 8 m of global mean sea-level rise, will improve the interpretation of high sea levels recorded from the Last Interglacial period (120 000 years ago) that provide a useful perspective on the future.
Juditha Aga, Julia Boike, Moritz Langer, Thomas Ingeman-Nielsen, and Sebastian Westermann
The Cryosphere, 17, 4179–4206, https://doi.org/10.5194/tc-17-4179-2023, https://doi.org/10.5194/tc-17-4179-2023, 2023
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This study presents a new model scheme for simulating ice segregation and thaw consolidation in permafrost environments, depending on ground properties and climatic forcing. It is embedded in the CryoGrid community model, a land surface model for the terrestrial cryosphere. We describe the model physics and functionalities, followed by a model validation and a sensitivity study of controlling factors.
José M. Muñoz-Hermosilla, Jaime Otero, Eva De Andrés, Kaian Shahateet, Francisco Navarro, and Iván Pérez-Doña
The Cryosphere Discuss., https://doi.org/10.5194/tc-2023-144, https://doi.org/10.5194/tc-2023-144, 2023
Revised manuscript accepted for TC
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A large fraction of the mass loss from marine-terminating glaciers is attributed to frontal ablation. In this study, we used a 3D ice-flow model of a real glacier that includes the effects of calving and submarine melting. Over a 30-month simulation, we found that the model reproduced the seasonal cycle for this glacier. Besides, the front positions were in good agreement with observations in the central part of the front, with longitudinal differences, on average, below 15 metres.
Thomas Frank, Ward J. J. van Pelt, and Jack Kohler
The Cryosphere, 17, 4021–4045, https://doi.org/10.5194/tc-17-4021-2023, https://doi.org/10.5194/tc-17-4021-2023, 2023
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Since the ice thickness of most glaciers worldwide is unknown, and since it is not feasible to visit every glacier and observe their thickness directly, inverse modelling techniques are needed that can calculate ice thickness from abundant surface observations. Here, we present a new method for doing that. Our methodology relies on modelling the rate of surface elevation change for a given glacier, compare this with observations of the same quantity and change the bed until the two are in line.
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.
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.
Huy Dinh, Dimitrios Giannakis, Joanna Slawinska, and Georg Stadler
The Cryosphere, 17, 3883–3893, https://doi.org/10.5194/tc-17-3883-2023, https://doi.org/10.5194/tc-17-3883-2023, 2023
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We develop a numerical method to simulate the fracture in kilometer-sized chunks of floating ice in the ocean. Our approach uses a mathematical model that balances deformation energy against the energy required for fracture. We study the strength of ice chunks that contain random impurities due to prior damage or refreezing and what types of fractures are likely to occur. Our model shows that crack direction critically depends on the orientation of impurities relative to surrounding forces.
René R. Wijngaard, Adam R. Herrington, William H. Lipscomb, Gunter R. Leguy, and Soon-Il An
The Cryosphere, 17, 3803–3828, https://doi.org/10.5194/tc-17-3803-2023, https://doi.org/10.5194/tc-17-3803-2023, 2023
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We evaluate the ability of the Community Earth System Model (CESM2) to simulate cryospheric–hydrological variables, such as glacier surface mass balance (SMB), over High Mountain Asia (HMA) by using a global grid (~111 km) with regional refinement (~7 km) over HMA. Evaluations of two different simulations show that climatological biases are reduced, and glacier SMB is improved (but still too negative) by modifying the snow and glacier model and using an updated glacier cover dataset.
Brian Groenke, Moritz Langer, Jan Nitzbon, Sebastian Westermann, Guillermo Gallego, and Julia Boike
The Cryosphere, 17, 3505–3533, https://doi.org/10.5194/tc-17-3505-2023, https://doi.org/10.5194/tc-17-3505-2023, 2023
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It is now well known from long-term temperature measurements that Arctic permafrost, i.e., ground that remains continuously frozen for at least 2 years, is warming in response to climate change. Temperature, however, only tells half of the story. In this study, we use computer modeling to better understand how the thawing and freezing of water in the ground affects the way permafrost responds to climate change and what temperature trends can and cannot tell us about how permafrost is changing.
Charlotte Durand, Tobias Sebastian Finn, Alban Farchi, Marc Bocquet, and Einar Òlason
EGUsphere, https://doi.org/10.5194/egusphere-2023-1384, https://doi.org/10.5194/egusphere-2023-1384, 2023
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This paper focuses on predicting the Arctic-wide sea-ice thickness using surrogate modeling with deep learning. The model has a predictive power from 12 hours up to eight months. For this forecast horizon, persistence and daily climatology are systematically outperformed, a result of learned thermodynamics and advection. Consequently, surrogate modelling with deep learning proves to be effective in capturing the complex behavior of sea-ice.
Yukihiko Onuma, Koji Fujita, Nozomu Takeuchi, Masashi Niwano, and Teruo Aoki
The Cryosphere, 17, 3309–3328, https://doi.org/10.5194/tc-17-3309-2023, https://doi.org/10.5194/tc-17-3309-2023, 2023
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We established a novel model that simulates the temporal changes in cryoconite hole (CH) depth using heat budgets calculated independently at the ice surface and CH bottom based on hole shape geometry. The simulations suggest that CH depth is governed by the balance between the intensity of the diffuse component of downward shortwave radiation and the wind speed. The meteorological conditions may be important factors contributing to the recent ice surface darkening via the redistribution of CHs.
Max Thomas, Briana Cate, Jack Garnett, Inga J. Smith, Martin Vancoppenolle, and Crispin Halsall
The Cryosphere, 17, 3193–3201, https://doi.org/10.5194/tc-17-3193-2023, https://doi.org/10.5194/tc-17-3193-2023, 2023
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A recent study showed that pollutants can be enriched in growing sea ice beyond what we would expect from a perfectly dissolved chemical. We hypothesise that this effect is caused by the specific properties of the pollutants working in combination with fluid moving through the sea ice. To test our hypothesis, we replicate this behaviour in a sea-ice model and show that this type of modelling can be applied to predicting the transport of chemicals with complex behaviour in sea ice.
Tobias Sebastian Finn, Charlotte Durand, Alban Farchi, Marc Bocquet, Yumeng Chen, Alberto Carrassi, and Véronique Dansereau
The Cryosphere, 17, 2965–2991, https://doi.org/10.5194/tc-17-2965-2023, https://doi.org/10.5194/tc-17-2965-2023, 2023
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We combine deep learning with a regional sea-ice model to correct model errors in the sea-ice dynamics of low-resolution forecasts towards high-resolution simulations. The combined model improves the forecast by up to 75 % and thereby surpasses the performance of persistence. As the error connection can additionally be used to analyse the shortcomings of the forecasts, this study highlights the potential of combined modelling for short-term sea-ice forecasting.
Philipp de Vrese, Goran Georgievski, Jesus Fidel Gonzalez Rouco, Dirk Notz, Tobias Stacke, Norman Julius Steinert, Stiig Wilkenskjeld, and Victor Brovkin
The Cryosphere, 17, 2095–2118, https://doi.org/10.5194/tc-17-2095-2023, https://doi.org/10.5194/tc-17-2095-2023, 2023
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The current generation of Earth system models exhibits large inter-model differences in the simulated climate of the Arctic and subarctic zone. We used an adapted version of the Max Planck Institute (MPI) Earth System Model to show that differences in the representation of the soil hydrology in permafrost-affected regions could help explain a large part of this inter-model spread and have pronounced impacts on important elements of Earth systems as far to the south as the tropics.
Xia Lin, François Massonnet, Thierry Fichefet, and Martin Vancoppenolle
The Cryosphere, 17, 1935–1965, https://doi.org/10.5194/tc-17-1935-2023, https://doi.org/10.5194/tc-17-1935-2023, 2023
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This study provides clues on how improved atmospheric reanalysis products influence sea ice simulations in ocean–sea ice models. The summer ice concentration simulation in both hemispheres can be improved with changed surface heat fluxes. The winter Antarctic ice concentration and the Arctic drift speed near the ice edge and the ice velocity direction simulations are improved with changed wind stress. The radiation fluxes and winds in atmospheric reanalyses are crucial for sea ice simulations.
Guillaume Boutin, Einar Ólason, Pierre Rampal, Heather Regan, Camille Lique, Claude Talandier, Laurent Brodeau, and Robert Ricker
The Cryosphere, 17, 617–638, https://doi.org/10.5194/tc-17-617-2023, https://doi.org/10.5194/tc-17-617-2023, 2023
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Sea ice cover in the Arctic is full of cracks, which we call leads. We suspect that these leads play a role for atmosphere–ocean interactions in polar regions, but their importance remains challenging to estimate. We use a new ocean–sea ice model with an original way of representing sea ice dynamics to estimate their impact on winter sea ice production. This model successfully represents sea ice evolution from 2000 to 2018, and we find that about 30 % of ice production takes place in leads.
Edoardo Raparelli, Paolo Tuccella, Valentina Colaiuda, and Frank S. Marzano
The Cryosphere, 17, 519–538, https://doi.org/10.5194/tc-17-519-2023, https://doi.org/10.5194/tc-17-519-2023, 2023
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We evaluate the skills of a single-layer (Noah) and a multi-layer (Alpine3D) snow model, forced with the Weather Research and Forecasting model, to reproduce snowpack properties observed in the Italian central Apennines. We found that Alpine3D reproduces the observed snow height and snow water equivalent better than Noah, while no particular model differences emerge on snow cover extent. Finally, we observed that snow settlement is mainly due to densification in Alpine3D and to melting in Noah.
Aleksandr Montelli and Jonathan Kingslake
The Cryosphere, 17, 195–210, https://doi.org/10.5194/tc-17-195-2023, https://doi.org/10.5194/tc-17-195-2023, 2023
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Thermal modelling and Bayesian inversion techniques are used to evaluate the uncertainties inherent in inferences of ice-sheet evolution from borehole temperature measurements. We show that the same temperature profiles may result from a range of parameters, of which geothermal heat flux through underlying bedrock plays a key role. Careful model parameterisation and evaluation of heat flux are essential for inferring past ice-sheet evolution from englacial borehole thermometry.
Jianting Zhao, Lin Zhao, Zhe Sun, Fujun Niu, Guojie Hu, Defu Zou, Guangyue Liu, Erji Du, Chong Wang, Lingxiao Wang, Yongping Qiao, Jianzong Shi, Yuxin Zhang, Junqiang Gao, Yuanwei Wang, Yan Li, Wenjun Yu, Huayun Zhou, Zanpin Xing, Minxuan Xiao, Luhui Yin, and Shengfeng Wang
The Cryosphere, 16, 4823–4846, https://doi.org/10.5194/tc-16-4823-2022, https://doi.org/10.5194/tc-16-4823-2022, 2022
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Permafrost has been warming and thawing globally; this is especially true in boundary regions. We focus on the changes and variability in permafrost distribution and thermal dynamics in the northern limit of permafrost on the Qinghai–Tibet Plateau (QTP) by applying a new permafrost model. Unlike previous papers on this topic, our findings highlight a slow, decaying process in the response of permafrost in the QTP to a warming climate, especially regarding areal extent.
Jeremy Rohmer, Remi Thieblemont, Goneri Le Cozannet, Heiko Goelzer, and Gael Durand
The Cryosphere, 16, 4637–4657, https://doi.org/10.5194/tc-16-4637-2022, https://doi.org/10.5194/tc-16-4637-2022, 2022
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To improve the interpretability of process-based projections of the sea-level contribution from land ice components, we apply the machine-learning-based
SHapley Additive exPlanationsapproach to a subset of a multi-model ensemble study for the Greenland ice sheet. This allows us to quantify the influence of particular modelling decisions (related to numerical implementation, initial conditions, or parametrisation of ice-sheet processes) directly in terms of sea-level change contribution.
Elise Kazmierczak, Sainan Sun, Violaine Coulon, and Frank Pattyn
The Cryosphere, 16, 4537–4552, https://doi.org/10.5194/tc-16-4537-2022, https://doi.org/10.5194/tc-16-4537-2022, 2022
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The water at the interface between ice sheets and underlying bedrock leads to lubrication between the ice and the bed. Due to a lack of direct observations, subglacial conditions beneath the Antarctic ice sheet are poorly understood. Here, we compare different approaches in which the subglacial water could influence sliding on the underlying bedrock and suggest that it modulates the Antarctic ice sheet response and increases uncertainties, especially in the context of global warming.
Lander Van Tricht and Philippe Huybrechts
The Cryosphere, 16, 4513–4535, https://doi.org/10.5194/tc-16-4513-2022, https://doi.org/10.5194/tc-16-4513-2022, 2022
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We examine the thermal regime of the Grigoriev ice cap and the Sary-Tor glacier, both located in the inner Tien Shan in Kyrgyzstan. Our findings are important as the ice dynamics can only be understood and modelled precisely if ice temperature is considered correctly in ice flow models. The calibrated parameters of this study can be used in applications with ice flow models for individual ice masses as well as to optimise more general models for large-scale regional simulations.
Nicolas Guillaume Alexandre Mokus and Fabien Montiel
The Cryosphere, 16, 4447–4472, https://doi.org/10.5194/tc-16-4447-2022, https://doi.org/10.5194/tc-16-4447-2022, 2022
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On the fringes of polar oceans, sea ice is easily broken by waves. As small pieces of ice, or floes, are more easily melted by the warming waters than a continuous ice cover, it is important to incorporate these floe sizes in climate models. These models simulate climate evolution at the century scale and are built by combining specialised modules. We study the statistical distribution of floe sizes under the impact of waves to better understand how to connect sea ice modules to wave modules.
Mauricio Arboleda-Zapata, Michael Angelopoulos, Pier Paul Overduin, Guido Grosse, Benjamin M. Jones, and Jens Tronicke
The Cryosphere, 16, 4423–4445, https://doi.org/10.5194/tc-16-4423-2022, https://doi.org/10.5194/tc-16-4423-2022, 2022
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We demonstrate how we can reliably estimate the thawed–frozen permafrost interface with its associated uncertainties in subsea permafrost environments using 2D electrical resistivity tomography (ERT) data. In addition, we show how further analyses considering 1D inversion and sensitivity assessments can help quantify and better understand 2D ERT inversion results. Our results illustrate the capabilities of the ERT method to get insights into the development of the subsea permafrost.
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.
Bo Gao and Ethan T. Coon
The Cryosphere, 16, 4141–4162, https://doi.org/10.5194/tc-16-4141-2022, https://doi.org/10.5194/tc-16-4141-2022, 2022
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Representing water at constant density, neglecting cryosuction, and neglecting heat advection are three commonly applied but not validated simplifications in permafrost models to reduce computation complexity at field scale. We investigated this problem numerically by Advanced Terrestrial Simulator and found that neglecting cryosuction can cause significant bias (10%–60%), constant density primarily affects predicting water saturation, and ignoring heat advection has the least impact.
Brooke Medley, Thomas A. Neumann, H. Jay Zwally, Benjamin E. Smith, and C. Max Stevens
The Cryosphere, 16, 3971–4011, https://doi.org/10.5194/tc-16-3971-2022, https://doi.org/10.5194/tc-16-3971-2022, 2022
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Satellite altimeters measure the height or volume change over Earth's ice sheets, but in order to understand how that change translates into ice mass, we must account for various processes at the surface. Specifically, snowfall events generate large, transient increases in surface height, yet snow fall has a relatively low density, which means much of that height change is composed of air. This air signal must be removed from the observed height changes before we can assess ice mass change.
Haoran Kang, Liyun Zhao, Michael Wolovick, and John C. Moore
The Cryosphere, 16, 3619–3633, https://doi.org/10.5194/tc-16-3619-2022, https://doi.org/10.5194/tc-16-3619-2022, 2022
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Basal thermal conditions are important to ice dynamics and sensitive to geothermal heat flux (GHF). We estimate basal thermal conditions of the Lambert–Amery Glacier system with six GHF maps. Recent GHFs inverted from aerial geomagnetic observations produce a larger warm-based area and match the observed subglacial lakes better than the other GHFs. The modelled basal melt rate is 10 to hundreds of millimetres per year in fast-flowing glaciers feeding the Amery Ice Shelf and smaller inland.
Florian Herla, Pascal Haegeli, and Patrick Mair
The Cryosphere, 16, 3149–3162, https://doi.org/10.5194/tc-16-3149-2022, https://doi.org/10.5194/tc-16-3149-2022, 2022
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We present an averaging algorithm for multidimensional snow stratigraphy profiles that elicits the predominant snow layering among large numbers of profiles and allows for compiling of informative summary statistics and distributions of snowpack layer properties. This creates new opportunities for presenting and analyzing operational snowpack simulations in support of avalanche forecasting and may inspire new ways of processing profiles and time series in other geophysical contexts.
Adam William Bateson, Daniel L. Feltham, David Schröder, Yanan Wang, Byongjun Hwang, Jeff K. Ridley, and Yevgeny Aksenov
The Cryosphere, 16, 2565–2593, https://doi.org/10.5194/tc-16-2565-2022, https://doi.org/10.5194/tc-16-2565-2022, 2022
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Numerical models are used to understand the mechanisms that drive the evolution of the Arctic sea ice cover. The sea ice cover is formed of pieces of ice called floes. Several recent studies have proposed variable floe size models to replace the standard model assumption of a fixed floe size. In this study we show the need to include floe fragmentation processes in these variable floe size models and demonstrate that model design can determine the impact of floe size on size ice evolution.
Anne Sophie Daloz, Clemens Schwingshackl, Priscilla Mooney, Susanna Strada, Diana Rechid, Edouard L. Davin, Eleni Katragkou, Nathalie de Noblet-Ducoudré, Michal Belda, Tomas Halenka, Marcus Breil, Rita M. Cardoso, Peter Hoffmann, Daniela C. A. Lima, Ronny Meier, Pedro M. M. Soares, Giannis Sofiadis, Gustav Strandberg, Merja H. Toelle, and Marianne T. Lund
The Cryosphere, 16, 2403–2419, https://doi.org/10.5194/tc-16-2403-2022, https://doi.org/10.5194/tc-16-2403-2022, 2022
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Snow plays a major role in the regulation of the Earth's surface temperature. Together with climate change, rising temperatures are already altering snow in many ways. In this context, it is crucial to better understand the ability of climate models to represent snow and snow processes. This work focuses on Europe and shows that the melting season in spring still represents a challenge for climate models and that more work is needed to accurately simulate snow–atmosphere interactions.
Basile de Fleurian, Richard Davy, and Petra M. Langebroek
The Cryosphere, 16, 2265–2283, https://doi.org/10.5194/tc-16-2265-2022, https://doi.org/10.5194/tc-16-2265-2022, 2022
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As temperature increases, more snow and ice melt at the surface of ice sheets. Here we use an ice dynamics and subglacial hydrology model with simplified geometry and climate forcing to study the impact of variations in meltwater on ice dynamics. We focus on the variations in length and intensity of the melt season. Our results show that a longer melt season leads to faster glaciers, but a more intense melt season reduces glaciers' seasonal velocities, albeit leading to higher peak velocities.
Maria-Gema Llorens, Albert Griera, Paul D. Bons, Ilka Weikusat, David J. Prior, Enrique Gomez-Rivas, Tamara de Riese, Ivone Jimenez-Munt, Daniel García-Castellanos, and Ricardo A. Lebensohn
The Cryosphere, 16, 2009–2024, https://doi.org/10.5194/tc-16-2009-2022, https://doi.org/10.5194/tc-16-2009-2022, 2022
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Polar ice is formed by ice crystals, which form fabrics that are utilised to interpret how ice sheets flow. It is unclear whether fabrics result from the current flow regime or if they are inherited. To understand the extent to which ice crystals can be reoriented when ice flow conditions change, we simulate and evaluate multi-stage ice flow scenarios according to natural cases. We find that second deformation regimes normally overprint inherited fabrics, with a range of transitional fabrics.
Tanja Schlemm, Johannes Feldmann, Ricarda Winkelmann, and Anders Levermann
The Cryosphere, 16, 1979–1996, https://doi.org/10.5194/tc-16-1979-2022, https://doi.org/10.5194/tc-16-1979-2022, 2022
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Marine cliff instability, if it exists, could dominate Antarctica's contribution to future sea-level rise. It is likely to speed up with ice thickness and thus would accelerate in most parts of Antarctica. Here, we investigate a possible mechanism that might stop cliff instability through cloaking by ice mélange. It is only a first step, but it shows that embayment geometry is, in principle, able to stop marine cliff instability in most parts of West Antarctica.
Frédéric Dupont, Dany Dumont, Jean-François Lemieux, Elie Dumas-Lefebvre, and Alain Caya
The Cryosphere, 16, 1963–1977, https://doi.org/10.5194/tc-16-1963-2022, https://doi.org/10.5194/tc-16-1963-2022, 2022
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In some shallow seas, grounded ice ridges contribute to stabilizing and maintaining a landfast ice cover. A scheme has already proposed where the keel thickness varies linearly with the mean thickness. Here, we extend the approach by taking into account the ice thickness and bathymetry distributions. The probabilistic approach shows a reasonably good agreement with observations and previous grounding scheme while potentially offering more physical insights into the formation of landfast ice.
Loris Compagno, Matthias Huss, Evan Stewart Miles, Michael James McCarthy, Harry Zekollari, Amaury Dehecq, Francesca Pellicciotti, and Daniel Farinotti
The Cryosphere, 16, 1697–1718, https://doi.org/10.5194/tc-16-1697-2022, https://doi.org/10.5194/tc-16-1697-2022, 2022
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We present a new approach for modelling debris area and thickness evolution. We implement the module into a combined mass-balance ice-flow model, and we apply it using different climate scenarios to project the future evolution of all glaciers in High Mountain Asia. We show that glacier geometry, volume, and flow velocity evolve differently when modelling explicitly debris cover compared to glacier evolution without the debris-cover module, demonstrating the importance of accounting for debris.
Kees Nederhoff, Li Erikson, Anita Engelstad, Peter Bieniek, and Jeremy Kasper
The Cryosphere, 16, 1609–1629, https://doi.org/10.5194/tc-16-1609-2022, https://doi.org/10.5194/tc-16-1609-2022, 2022
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Diminishing sea ice is impacting waves across the Arctic region. Recent work shows the effect of the sea ice on offshore waves; however, effects within the nearshore are less known. This study characterizes the wave climate in the central Beaufort Sea coast of Alaska. We show that the reduction of sea ice correlates strongly with increases in the average and extreme waves. However, found trends deviate from offshore, since part of the increase in energy is dissipated before reaching the shore.
Stiig Wilkenskjeld, Frederieke Miesner, Paul P. Overduin, Matteo Puglini, and Victor Brovkin
The Cryosphere, 16, 1057–1069, https://doi.org/10.5194/tc-16-1057-2022, https://doi.org/10.5194/tc-16-1057-2022, 2022
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Thawing permafrost releases carbon to the atmosphere, enhancing global warming. Part of the permafrost soils have been flooded by rising sea levels since the last ice age, becoming subsea permafrost (SSPF). The SSPF is less studied than the part on land. In this study we use a global model to obtain rates of thawing of SSPF under different future climate scenarios until the year 3000. After the year 2100 the scenarios strongly diverge, closely connected to the eventual disappearance of sea ice.
Klaus Dethloff, Wieslaw Maslowski, Stefan Hendricks, Younjoo J. Lee, Helge F. Goessling, Thomas Krumpen, Christian Haas, Dörthe Handorf, Robert Ricker, Vladimir Bessonov, John J. Cassano, Jaclyn Clement Kinney, Robert Osinski, Markus Rex, Annette Rinke, Julia Sokolova, and Anja Sommerfeld
The Cryosphere, 16, 981–1005, https://doi.org/10.5194/tc-16-981-2022, https://doi.org/10.5194/tc-16-981-2022, 2022
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Sea ice thickness anomalies during the MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) winter in January, February and March 2020 were simulated with the coupled Regional Arctic climate System Model (RASM) and compared with CryoSat-2/SMOS satellite data. Hindcast and ensemble simulations indicate that the sea ice anomalies are driven by nonlinear interactions between ice growth processes and wind-driven sea-ice transports, with dynamics playing a dominant role.
Cited articles
Albrecht, T., Martin, M., Haseloff, M., Winkelmann, R., and Levermann, A.:
Parameterization for subgrid-scale motion of ice-shelf calving fronts, The Cryosphere, 5, 35–44,
https://doi.org/10.5194/tc-5-35-2011, 2011.
Amante, C. and Eakins, B. W.: ETOPO1 1 arcminute global relief model:
procedures, data sources and analysis, NOAA technical memorandum NESDIS
NGDC-24, Natl. Geophys. Data Center, NOAA, Boulder, CO,
https://doi.org/10.7289/V5C8276M, 2009.
Andersen, K. K.,
Azuma, N., Barnola, J.-M., Bigler, M., Biscaye, P., Caillon, N.,
Chappellaz, J., Clausen, H. B., Dahl-Jensen, D., Fischer, H.,
Flückiger, J., Fritzsche, D., Fujii, Y., Goto-Azuma, K., Grønvold, K.,
Gundestrup, N. S., Hansson, M., Huber, C., Hvidberg, C. S., Johnsen, S. J.,
Jonsell, U., Jouzel, J., Kipfstuhl, S., Landais, A., Leuenberger, M.,
Lorrain, R., Masson-Delmotte, V., Miller, H., Motoyama, H., Narita, H.,
Popp, T., Rasmussen, S. O., Raynaud, D., Rothlisberger, R., Ruth, U.,
Samyn, D., Schwander, J., Shoji, H., Siggard-Andersen, M.-L.,
Steffensen, J. P., Stocker, T., Sveinbjörnsdóttir, A. E., Svensson, A.,
Takata, M., Tison, J.-L., Thorsteinsson, T., Watanabe, O., Wilhelms, F., and
White, J. W. C.: High-resolution record of Northern Hemisphere climate
extending into the last interglacial period, Nature, 431, 147–151,
https://doi.org/10.1038/nature02805, data
archived at the World Data Center for Paleoclimatology, Boulder, Colorado,
USA, 2004.
Aschwanden, A., Bueler, E., Khroulev, C., and Blatter, H.: An enthalpy
formulation for glaciers and ice sheets, J. Glaciol., 58, 441–457,
https://doi.org/10.3189/2012JoG11J088,
2012.
Aschwanden, A., Aðalgeirsdóttir, G., and Khroulev, C.: Hindcasting to
measure ice sheet model sensitivity to initial states, The Cryosphere, 7,
1083–1093,
https://doi.org/10.5194/tc-7-1083-2013,
2013.
Balay, S., Abhyankar, S., Adams, M. F., Brown, J., Brune, P., Buschelman, K.,
Eijkhout, V., Gropp, W. D., Kaushik, D., Knepley, M. G., McInnes, L. C.,
Rupp, K., Smith, B. F., and Zhang, H.: PETSc Web page, available at:
http://www.mcs.anl.gov/petsc (last access: 2015), 2015.
Barendregt, R. W. and Irving, E.: Changes in the extent of North American ice
sheets during the late Cenozoic, Can. J. Earth Sci., 35, 504–509,
https://doi.org/10.1139/e97-126, 1998.
Bednarski, J. M. and Smith, I. R.: Laurentide and montane glaciation along
the Rocky Mountain Foothills of northeastern British Columbia, Can. J. Earth
Sci., 44, 445–457,
https://doi.org/10.1139/e06-095, 2007.
Blackwell, D. D. and Richards, M.: Geothermal Map of North America, Am.
Assoc. Petr. Geol., Tulsa, OK, 2004.
Booth, D. B., Troost, K. G., Clague, J. J., and Waitt, R. B.: The Cordilleran
ice sheet, in: The Quaternary Period in the United States, edited by:
Gillespie, A., Porter, S., and Atwater, B., vol. 1 of Dev. Quaternary Sci.,
Elsevier, Amsterdam, 17–43,
https://doi.org/10.1016/s1571-0866(03)01002-9,
2003.
Boulton, G. S. and Clark, C. D.: A highly mobile Laurentide ice sheet
revealed by satellite images of glacial lineations, Nature, 346, 813–817,
https://doi.org/10.1038/346813a0, 1990.
Boulton, G. S., Dongelmans, P., Punkari, M., and Broadgate, M.:
Palaeoglaciology of an ice sheet through a glacial cycle: the European ice
sheet through the Weichselian, Quaternary Res., 20, 591–625,
https://doi.org/10.1016/s0277-3791(00)00160-8,
2001.
Briner, J. P. and Kaufman, D. S.: Late Pleistocene mountain glaciation in
Alaska: key chronologies, J. Quaternary Sci., 23, 659–670,
https://doi.org/10.1002/jqs.1196, 2008.
Bueler, E. and Brown, J.: Shallow shelf approximation as a “sliding law” in
a thermodynamically coupled ice sheet model, J. Geophys. Res., 114, F03008,
https://doi.org/10.1029/2008JF001179,
2009.
Bueler, E. and van Pelt, W.: Mass-conserving subglacial hydrology in the
Parallel Ice Sheet Model version 0.6, Geosci. Model Dev., 8, 1613–1635,
https://doi.org/10.5194/gmd-8-1613-2015,
2015.
Bueler, E., Lingle, C. S., and Brown, J.: Fast computation of a viscoelastic
deformable Earth model for ice-sheet simulations, Ann. Glaciol., 46, 97–105,
https://doi.org/10.3189/172756407782871567,
2007.
Burke, M. J., Brennand, T. A., and Perkins, A. J.: Transient subglacial
hydrology of a thin ice sheet: insights from the Chasm esker, British
Columbia, Canada, Quaternary Res., 58, 30–55,
https://doi.org/10.1016/j.quascirev.2012.09.004,
2012a.
Burke, M. J., Brennand, T. A., and Perkins, A. J.: Evolution of the
subglacial hydrologic system beneath the rapidly decaying Cordilleran Ice
Sheet caused by ice-dammed lake drainage: implications for meltwater-induced
ice acceleration, Quaternary Res., 50, 125–140,
https://doi.org/10.1016/j.quascirev.2012.07.005,
2012b.
Calov, R. and Greve, R.: A semi-analytical solution for the positive
degree-day model with stochastic temperature variations, J. Glaciol., 51,
173–175,
https://doi.org/10.3189/172756505781829601,
2005.
Carlson, A. E. and Clark, P. U.: Ice sheet sources of sea level
rise and
freshwater discharge during the last deglaciation, Rev. Geophys., 50, RG4007,
https://doi.org/10.1029/2011rg000371,
2012.
Carrara, P. E., Kiver, E. P., and Stradling, D. F.: The southern limit of
Cordilleran ice in the Colville and Pend Oreille valleys of northeastern
Washington during the Late Wisconsin glaciation, Can. J. Earth Sci., 33,
769–778, https://doi.org/10.1139/e96-059,
1996.
Clague, J., Armstrong, J., and Mathews, W.: Advance of the late Wisconsin
Cordilleran Ice Sheet in southern British Columbia since 22 000 yr BP,
Quaternary Res., 13, 322–326,
https://doi.org/10.1016/0033-5894(80)90060-5,
1980.
Clague, J. J.: Late Quaternary Geology and Geochronology of British Columbia
Part 2: Summary and Discussion of Radiocarbon-Dated Quaternary History, Geol.
Surv. of Can., Ottawa, ON, Paper 80-35,
https://doi.org/10.4095/119439, 1981.
Clague, J. J.: Delaciation of the Prince Rupert – Kitimat area, British
Columbia, Can. J. Earth Sci., 22, 256–265,
https://doi.org/10.1139/e85-022, 1985.
Clague, J. J.: The Quaternary stratigraphic record of British Columbia –
evidence for episodic sedimentation and erosion controlled by glaciation,
Can. J. Earth Sci., 23, 885–894,
https://doi.org/10.1139/e86-090, 1986.
Clague, J. J.: Character and distribution of Quaternary deposits (Canadian
Cordillera), in: Quaternary Geology of Canada and Greenland, edited by:
Fulton, R. J., vol. 1 of Geology of Canada, Geol. Surv. of Can., Ottawa, ON,
34–48, https://doi.org/10.4095/127905, 1989.
Clague, J. J. and James, T. S.: History and isostatic effects of the last ice
sheet in southern British Columbia, Quaternary Res., 21, 71–87,
https://doi.org/10.1016/s0277-3791(01)00070-1,
2002.
Clague, J. J. and Ward, B.: Pleistocene Glaciation of British Columbia, in:
Dev. Quaternary Sci., vol. 15, edited by: Ehlers, J., Gibbard, P. L., and
Hughes, P. D., Elsevier, Amsterdam, 563–573,
https://doi.org/10.1016/b978-0-444-53447-7.00044-1,
2011.
Clague, J. J., Mathewes, R. W., Guilbault, J.-P., Hutchinson, I., and
Ricketts, B. D.: Pre-Younger Dryas resurgence of the southwestern margin of
the Cordilleran ice sheet, British Columbia, Canada, Boreas, 26, 261–278,
https://doi.org/10.1111/j.1502-3885.1997.tb00855.x,
1997.
Clague, J. J., Froese, D., Hutchinson, I., James, T. S., and Simon, K. M.:
Early growth of the last Cordilleran ice sheet deduced from glacio-isostatic
depression in southwest British Columbia, Canada, Quaternary Res., 63,
53–59,
https://doi.org/10.1016/j.yqres.2004.09.007,
2005.
Clark, P. U. and Mix, A. C.: Ice sheets and sea level of the Last Glacial Maximum, Quaternary Res., 21, 1–7,
https://doi.org/10.1016/s0277-3791(01)00118-4, 2002.
Clason, C., Mair, D. W., Burgess, D. O., and Nienow, P. W.: Modelling the
delivery of supraglacial meltwater to the ice/bed interface: application to
southwest Devon Ice Cap, Nunavut, Canada, J. Glaciol., 58, 361–374,
https://doi.org/10.3189/2012jog11j129,
2012.
Clarke, G. K. C., Anslow, F. S., Jarosch, A. H., Radić, V., Menounos,
B., Bolch, T., and Berthier, E.: Ice Volume and Subglacial Topography for
Western Canadian Glaciers from Mass Balance Fields, Thinning Rates, and a Bed
Stress Model, J. Climate, 26, 4282–4303,
https://doi.org/10.1175/jcli-d-12-00513.1,
2013.
Clason, C., Applegate, P., and Holmlund, P.: Modelling Late Weichselian
evolution of the Eurasian ice sheets forced by surface meltwater-enhanced
basal sliding, J. Glaciol., 60, 29–40,
https://doi.org/10.3189/2014jog13j037,
2014.
Cosma, T., Hendy, I., and Chang, A.: Chronological constraints on Cordilleran
Ice Sheet glaciomarine sedimentation from core MD02-2496 off Vancouver Island
(western Canada), Quaternary Sci. Rev., 27, 941–955,
https://doi.org/10.1016/j.quascirev.2008.01.013,
2008.
Cuffey, K. M. and Paterson, W. S. B.: The physics of glaciers, Elsevier,
Amsterdam, 2010.
Dansgaard, W., Johnsen, S. J., Clausen, H. B.,
Dahl-Jensen, D., Gundestrup, N. S., Hammer, C. U., Hvidberg, C. S.,
Steffensen, J. P., Sveinbjörnsdottir, A. E., Jouzel, J., and Bond, G.:
Evidence for general instability of past climate from a 250-kyr ice-core
record, Nature, 364, 218–220,
https://doi.org/10.1038/364218a0, data
archived at the World Data Center for Paleoclimatology, Boulder, Colorado,
USA., 1993.
Davies, M. H., Mix, A. C., Stoner, J. S., Addison, J. A., Jaeger, J.,
Finney, B., and Wiest, J.: The deglacial transition on the southeastern
Alaska Margin: Meltwater input, sea level rise, marine productivity, and
sedimentary anoxia, Paleoceanography, 26, PA2223,
https://doi.org/10.1029/2010pa002051,
2011.
Davis, N. F. G. and Mathews, W. H.: Four phases of glaciation with
illustrations from Southwestern British Columbia, J. Geol., 52, 403–413,
https://doi.org/10.1086/625236, 1944.
Dawson, G. M.: III. – Recent observations on the glaciation of British
Columbia and adjacent regions, Geol. Mag., 5, 347–350,
https://doi.org/10.1017/s0016756800182159,
1888.
Demuro, M., Froese, D. G., Arnold, L. J., and Roberts, R. G.: Single-grain
OSL dating of glaciofluvial quartz constrains Reid glaciation in NW Canada to
MIS 6, Quaternary Res., 77, 305–316,
https://doi.org/10.1016/j.yqres.2011.11.009,
2012.
Duk-Rodkin, A.: Glacial limits map of Yukon Territory, Open File 3694, Geol.
Surv. of Can., Ottawa, ON,
https://doi.org/10.4095/210739,
1999.
Duk-Rodkin, A., Barendregt, R. W., Tarnocai, C., and Phillips, F. M.: Late
Tertiary to late Quaternary record in the Mackenzie Mountains, Northwest
Territories, Canada: stratigraphy, paleosols, paleomagnetism, and
chlorine-36, Can. J. Earth Sci., 33, 875–895,
https://doi.org/10.1139/e96-066, 1996.
Dyke, A. S.: An outline of North American deglaciation with emphasis
on central and northern Canada, in: Dev. Quaternary Sci., vol. 2,
edited by: Ehlers, J. and Gibbard, P. L., Elsevier, Amsterdam, 373–424,
https://doi.org/10.1016/S1571-0866(04)80209-4, 2004.
Dyke, A. S. and Prest, V. K.: Late wisconsinan and holocene history of the
laurentide ice sheet, Geogr. Phys. Quatern., 41, 237–263,
https://doi.org/10.7202/032681ar, 1987.
Dyke, A. S., Moore, A., and Robertson, L.: Deglaciation of North America,
Open File 1547, Geol. Surv. of Can., Ottawa, ON, 2003.
Fahnestock, M., Abdalati, W., Joughin, I., Brozena, J., and Gogineni, P.:
High geothermal heat flow, basal melt, and the origin of rapid ice flow in
central greenland, Sience, 294, 2338–2342,
https://doi.org/10.1126/science.1065370,
2001.
Ferbey, T., Arnold, H., and Hickin, A.: Ice-flow indicator compilation,
British Columbia., British Columbia Geol. Surv., Victoria, BC, Open-File
2013-06,
http://www.em.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/OpenFiles/2013/Pages/2013-06.aspx,
2013.
Fisher, D., Osterberg,
E., Dyke, A., Dahl-Jensen, D., Demuth, M., Zdanowicz, C., Bourgeois, J.,
Koerner, R. M., Mayewski, P., Wake, C., Kreutz, K., Steig, E., Zheng, J.,
Yalcin, K., Goto-Azuma, K., Luckman, B., and Rupper, S.: The Mt Logan
Holocene–late Wisconsinan isotope record: tropical Pacific–Yukon
connections, The Holocene, 18, 667–677,
https://doi.org/10.1177/0959683608092236,
2008.
Fisher, D. A., Wake, C., Kreutz, K., Yalcin, K.,
Steig, E., Mayewski, P., Anderson, L., Zheng, J., Rupper, S., Zdanowicz, C.,
Demuth, M., Waszkiewicz, M., Dahl-Jensen, D., Goto-Azuma, K., Bourgeois,
J. B., Koerner, R. M., Sekerka, J., Osterberg, E., Abbott, M. B., Finney,
B. P., and Burns, S. J.: Stable Isotope Records from Mount Logan, Eclipse Ice
Cores and Nearby Jellybean Lake. Water Cycle of the North Pacific Over 2000
Years and Over Five Vertical Kilometres: Sudden Shifts and Tropical
Connections, Géogr. phys. Quatern., 58, 337,
https://doi.org/10.7202/013147ar, 2004.
Friele, P. A. and Clague, J. J.: Readvance of glaciers in the British
Columbia Coast Mountains at the end of the last glaciation, Quatern. Int.,
87, 45–58,
https://doi.org/10.1016/s1040-6182(01)00061-1,
2002a.
Friele, P. A. and Clague, J. J.: Younger Dryas readvance in Squamish river
valley, southern Coast mountains, British Columbia, Quaternary Res., 21,
1925–1933,
https://doi.org/10.1016/s0277-3791(02)00081-1,
2002b.
Fulton, R. J.: Deglaciation studies in Kamloops region, an area of moderate
relief, British Columbia, vol. 154 of Bull., Geol. Surv. of Can., Ottawa, ON,
https://doi.org/10.4095/101467, 1967.
Fulton, R. J.: A Conceptual model for growth and decay of the Cordilleran Ice
Sheet, Geogr. Phys. Quatern., 45, 281–286,
https://doi.org/10.7202/032875ar, 1991.
Glen, J.: Experiments on the deformation of ice, J. Glaciol., 2, 111–114, 1952.
Golledge, N. R., Mackintosh, A. N.,
Anderson, B. M., Buckley, K. M., Doughty, A. M., Barrell, D. J.,
Denton, G. H., Vandergoes, M. J., Andersen, B. G., and Schaefer, J. M.: Last
Glacial Maximum climate in New Zealand inferred from a modelled
Southern Alps icefield, Quaternary Res., 46, 30–45,
https://doi.org/10.1016/j.quascirev.2012.05.004,
2012.
Greve, R.: A continuum-mechanical formulation for shallow polythermal ice sheets, Philos. T. R. Soc. A, 355, 921–974,
https://doi.org/10.1098/rsta.1997.0050, 1997.
Herbert, T. D.,
Schuffert, J. D., Andreasen, D., Heusser, L., Lyle, M., Mix, A.,
Ravelo, A. C., Stott, L. D., and Herguera, J. C.: Collapse of the California
current during glacial maxima linked to climate change on land, Sience, 293,
71–76,
https://doi.org/10.1126/science.1059209,
data archived at the World Data Center for Paleoclimatology, Boulder,
Colorado, USA, 2001.
Hijmans, R. J., Cameron, S. E., Parra, J. L., Jones, P. G., and Jarvis, A.:
Very high resolution interpolated climate surfaces for global land areas,
Int. J. Climatol., 25, 1965–1978,
https://doi.org/10.1002/joc.1276, 2005.
Hidy, A. J., Gosse, J. C., Froese, D. G., Bond, J. D., and Rood, D. H.: A
latest Pliocene age for the earliest and most extensive Cordilleran Ice Sheet
in northwestern Canada, Quaternary Res., 61, 77–84,
https://doi.org/10.1016/j.quascirev.2012.11.009,
2013.
Hock, R.: Temperature index melt modelling in mountain areas, J. Hydrol., 282, 104–115,
https://doi.org/10.1016/S0022-1694(03)00257-9, 2003.
Huss, M. and Farinotti, D.: Distributed ice thickness and volume of all
glaciers around the globe, J. Geophys. Res. Earth Surf., 117, F04010,
https://doi.org/10.1029/2012JF002523,
2012.
Imbrie, J., McIntyre, A., and Mix, A.: Oceanic response to orbital forcing in
the late quaternary: observational and experimental strategies, in: Climate
and Geo-Sciences, edited by: Berger, A., Schneider, S., and Duplessy, J.,
vol. 285 of NATO ASI Series C, Kluwer, Norwell, MA, 121–164,
https://doi.org/10.1007/978-94-009-2446-8_7,
1989.
Ivy-Ochs, S., Schluchter, C., Kubik, P. W., and Denton, G. H.: Moraine
exposure dates imply synchronous Younger Dryas Glacier advances in the
European Alps and in the Southern Alps of New Zealand, Geogr. Ann. A, 81,
313–323,
https://doi.org/10.1111/1468-0459.00060,
1999.
Jackson, L. E. and Clague, J. J.: The Cordilleran ice sheet: one hundred and
fifty years of exploration and discovery, Geogr. Phys. Quatern., 45,
269–280, https://doi.org/10.7202/032874ar,
1991.
Jackson, L. E., Phillips, F. M., Shimamura, K., and Little, E. C.: Cosmogenic
36Cl dating of the Foothills erratics train, Alberta, Canada, Geology,
25, 195,
https://doi.org/10.1130/0091-7613(1997)025<0195:ccdotf>2.3.CO;2,
1997.
James, T. S., Gowan, E. J., Wada, I., and Wang, K.: Viscosity of the
asthenosphere from glacial isostatic adjustment and subduction dynamics at
the northern Cascadia subduction zone, British Columbia, Canada, J. Geophys.
Res., 114, B04405,
https://doi.org/10.1029/2008jb006077,
2009.
Jarosch, A. H., Anslow, F. S., and Clarke, G. K. C.: High-resolution
precipitation and temperature downscaling for glacier models, Clim. Dynam.,
38, 391–409,
https://doi.org/10.1007/s00382-010-0949-1,
2012.
Johnsen, S. J., Dahl-Jensen, D., Dansgaard, W., and Gundestrup, N.: Greenland
palaeotemperatures derived from GRIP bore hole temperature and ice core
isotope profiles, Tellus B, 47, 624–629,
https://doi.org/10.1034/j.1600-0889.47.issue5.9.x,
1995.
Jouzel, J., Masson-Delmotte, V.,
Cattani, O., Dreyfus, G., Falourd, S., Hoffmann, G., Minster, B., Nouet, J.,
Barnola, J. M., Chappellaz, J., Fischer, H., Gallet, J. C., Johnsen, S.,
Leuenberger, M., Loulergue, L., Luethi, D., Oerter, H., Parrenin, F.,
Raisbeck, G., Raynaud, D., Schilt, A., Schwander, J., Selmo, E., Souchez, R.,
Spahni, R., Stauffer, B., Steffensen, J. P., Stenni, B., Stocker, T. F.,
Tison, J. L., Werner, M., and Wolff, E. W.: Orbital and millennial antarctic
climate variability over the past 800 000 years, Sience, 317, 793–796,
https://doi.org/10.1126/science.1141038,
data archived at the World Data Center for Paleoclimatology, Boulder,
Colorado, USA., 2007.
Kaufman, D. S. and Manley, W. F.: Pleistocene maximum and late wisconsinan
glacier extents across Alaska, USA, in: Dev. Quaternary Sci., vol. 2,
edited by: Ehlers, J. and Gibbard, P. L., Elsevier, Amsterdam, 9–27,
https://doi.org/10.1016/S1571-0866(04)80182-9,
2004.
Kienast, S. S. and McKay, J. L.: Sea surface temperatures in the subarctic
northeast Pacific reflect millennial-scale climate oscillations during the
last 16 kyrs, Geophys. Res. Lett., 28, 1563–1566,
https://doi.org/10.1029/2000GL012543,
2001.
Kleman, J.: Preservation of landforms under ice sheets and ice caps, Geomorphology, 9, 19–32,
https://doi.org/10.1016/0169-555x(94)90028-0, 1994.
Kleman, J. and Stroeven, A. P.: Preglacial surface remnants and Quaternary
glacial regimes in northwestern Sweden, Geomorphology, 19, 35–54,
https://doi.org/10.1016/s0169-555x(96)00046-3,
1997.
Kleman, J., Hättestrand, C., Borgström, I., and Stroeven, A.:
Fennoscandian paleoglaciology reconstructed using a glacial geological
inversion model, J. Glaciol., 43, 283–299, 1997.
Kleman, J., Hättestrand, C., Stroeven, A. P., Jansson, K. N.,
De Angelis, H., and Borgström, I.: Reconstruction of palaeo-ice sheets –
inversion of their glacial geomorphological record, in: Glacier Science and
Environmental Change, edited by: Knight, P. G., Blackwell, Malden, MA,
192–198,
https://doi.org/10.1002/9780470750636.ch38,
2006.
Kleman, J., Stroeven, A. P., and Lundqvist, J.: Patterns of quaternary ice
sheet erosion and deposition in Fennoscandia and a theoretical framework for
explanation, Geomorphology, 97, 73–90,
https://doi.org/10.1016/j.geomorph.2007.02.049,
2008.
Kleman, J., Jansson, K., De Angelis, H., Stroeven, A., Hättestrand, C.,
Alm, G., and Glasser, N.: North American ice sheet build-up during the last
glacial cycle, 115–21 kyr, Quaternary Sci. Rev., 29, 2036–2051,
https://doi.org/10.1016/j.quascirev.2010.04.021,
2010.
Kovanen, D. J.: Morphologic and stratigraphic evidence for Allerød and
Younger Dryas age glacier fluctuations of the Cordilleran Ice Sheet, British
Columbia, Canada and Northwest Washington, USA, Boreas, 31, 163–184,
https://doi.org/10.1111/j.1502-3885.2002.tb01064.x,
2002.
Kovanen, D. J. and Easterbrook, D. J.: Timing and extent of Allerød and
Younger Dryas age (ca. 12 500–10 000 14C yr BP) oscillations of the
Cordilleran Ice Sheet in the Fraser Lowland, Western North America,
Quaternary Res., 57, 208–224,
https://doi.org/10.1006/qres.2001.2307,
2002.
Lakeman, T. R., Clague, J. J., and Menounos, B.: Advance of alpine glaciers
during final retreat of the Cordilleran ice sheet in the Finlay River area,
northern British Columbia, Canada, Quaternary Res., 69, 188–200,
https://doi.org/10.1016/j.yqres.2008.01.002,
2008.
Langen, P. L., Solgaard, A. M., and Hvidberg, C. S.: Self-inhibiting growth
of the Greenland ice sheet, Geophys. Res. Lett., 39, L12502,
https://doi.org/10.1029/2012GL051810,
2012.
Levermann, A., Albrecht, T., Winkelmann, R., Martin, M. A., Haseloff, M., and
Joughin, I.: Kinematic first-order calving law implies potential for abrupt
ice-shelf retreat, The Cryosphere, 6, 273–286,
https://doi.org/10.5194/tc-6-273-2012,
2012.
Lingle, C. S. and Clark, J. A.: A numerical model of interactions between
a marine ice sheet and the Solid Earth: application to a West Antarctic ice
stream, J. Geophys. Res., 90, 1100–1114,
https://doi.org/10.1029/JC090iC01p01100,
1985.
Lisiecki, L. E. and Raymo, M. E.: A Pliocene-Pleistocene stack of 57 globally
distributed benthic δ18O records, Paleoceanography, 20, PA1003,
https://doi.org/10.1029/2004pa001071,
2005.
Lliboutry, L. A. and Duval, P.: Various isotropic and anisotropic ices found
in glaciers and polar ice caps and their corresponding rheologies, Ann.
Geophys., 3, 207–224, 1985.
Luckman, B. and Osborn, G.: Holocene glacier fluctuations in the middle
Canadian Rocky Mountains, Quaternary Res., 11, 52–77,
https://doi.org/10.1016/0033-5894(79)90069-3,
1979.
Lundqvist, J.: Glaciodynamics of the Younger Dryas Marginal zone in
Scandinavia: implications of a revised glaciation model, Geogr. Ann. A, 69,
305, https://doi.org/10.2307/521191, 1987.
Lüthi, M., Funk, M., Iken, A., Gogineni, S., and Truffer, M.: Mechanisms
of fast flow in Jakobshavns Isbræ, Greenland; Part III:
measurements of ice deformation, temperature and cross-borehole conductivity
in boreholes to the bedrock, J. Glaciol., 48, 369–385,
https://doi.org/10.3189/172756502781831322,
2002.
Margold, M., Jansson, K. N., Kleman, J., and Stroeven, A. P.: Glacial
meltwater landforms of central British Columbia, J. Maps, 7, 486–506,
https://doi.org/10.4113/jom.2011.1205,
2011.
Margold, M., Jansson, K. N., Kleman, J., and Stroeven, A. P.: Lateglacial ice
dynamics of the Cordilleran Ice Sheet in northern British Columbia and
southern Yukon Territory: retreat pattern of the Liard Lobe reconstructed
from the glacial landform record, J. Quaternary Sci., 28, 180–188,
https://doi.org/10.1002/jqs.2604,
2013a.
Margold, M., Jansson, K. N., Kleman, J., Stroeven, A. P., and Clague, J. J.:
Retreat pattern of the Cordilleran Ice Sheet in central British Columbia at
the end of the last glaciation reconstructed from glacial meltwater
landforms, Boreas, 42, 830–847,
https://doi.org/10.1111/bor.12007,
2013b.
Margold, M., Stroeven, A. P., Clague, J. J., and Heyman, J.: Timing of
terminal Pleistocene deglaciation at high elevations in southern and central
British Columbia constrained by 10Be exposure dating, Quaternary Res.,
99, 193–202,
https://doi.org/10.1016/j.quascirev.2014.06.027,
2014.
Marshall, S. J., Tarasov, L., Clarke, G. K., and Peltier, W. R.:
Glaciological reconstruction of the Laurentide Ice Sheet: physical processes
and modelling challenges, Can. J. Earth Sci., 37, 769–793,
https://doi.org/10.1139/e99-113, 2000.
Martin, M. A., Winkelmann, R., Haseloff, M., Albrecht, T., Bueler, E.,
Khroulev, C., and Levermann, A.: The Potsdam Parallel Ice Sheet Model
(PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice
sheet, The Cryosphere, 5, 727–740,
https://doi.org/10.5194/tc-5-727-2011,
2011.
McNabb, R. W., Hock, R., and Huss, M.: Variations in Alaska tidewater glacier
frontal ablation, 1985–2013, J. Geophys. Res. Earth Surf., 120, 120–136,
https://doi.org/10.1002/2014JF003276,
2015.
Menounos, B., Osborn, G., Clague, J. J., and Luckman, B. H.: Latest
Pleistocene and Holocene glacier fluctuations in western Canada, Quaternary
Sci. Rev., 28, 2049–2074,
https://doi.org/10.1016/j.quascirev.2008.10.018,
2008.
Mesinger, F., DiMego, G., Kalnay, E., Mitchell, K., Shafran, P. C.,
Ebisuzaki, W., Jović, D., Woollen, J., Rogers, E., Berbery, E. H.,
Ek, M. B., Fan, Y., Grumbine, R., Higgins, W., Li, H., Lin, Y., Manikin, G.,
Parrish, D., and Shi, W.: North American regional reanalysis, B. Am.
Meteorol. Soc., 87, 343–360,
https://doi.org/10.1175/BAMS-87-3-343,
2006.
Nye, J. F.: The Flow Law of Ice from Measurements in Glacier Tunnels,
Laboratory Experiments and the Jungfraufirn Borehole Experiment, Proc. R.
Soc. London, Ser. A, 219, 477–489, 1953.
Osborn, G. and Gerloff, L.: Latest pleistocene and early Holocene
fluctuations of glaciers in the Canadian and northern American Rockies,
Quatern. Int., 38–39, 7–19,
https://doi.org/10.1016/s1040-6182(96)00026-2,
1997.
Osborn, G., Clapperton, C., Davis, P., Reasoner, M., Rodbell, D. T., Seltzer,
G. O., and Zielinski, G.: Potential glacial evidence for the younger dryas
event in the Cordillera of North and South America, Quaternary Sci. Rev., 14,
823–832,
https://doi.org/10.1016/0277-3791(95)00064-x,
1995.
Paterson, W. S. B. and Budd, W. F.: Flow parameters for ice sheet modeling,
Cold Reg. Sci. Technol., 6, 175–177, 1982.
Patterson, T. and Kelso, N. V.: Natural Earth, Free vector and raster
map data, available at: http://naturalearthdata.com (last access:
2015), 2015.
Perkins, A. J. and Brennand, T. A.: Refining the pattern and style of
Cordilleran Ice Sheet retreat: palaeogeography, evolution and implications of
lateglacial ice-dammed lake systems on the southern Fraser Plateau, British
Columbia, Canada, Boreas, 44, 319–342,
https://doi.org/10.1111/bor.12100, 2015.
Perkins, A. J., Brennand, T. A., and Burke, M. J.: Genesis of an esker-like
ridge over the southern Fraser Plateau, British Columbia: implications for
paleo-ice sheet reconstruction based on geomorphic inversion, Geomorphology,
190, 27–39,
https://doi.org/10.1016/j.geomorph.2013.02.005,
2013.
Petit, J. R., Jouzel, J., Raynaud, D., Barkov, N. I., Barnola, J.-M.,
Basile, I., Bender, M., Chappellaz, J., Davis, M., Delaygue, G.,
Delmotte, M., Kotlyakov, V. M., Legrand, M., Lipenkov, V. Y., Lorius, C.,
Pépin, L., Ritz, C., Saltzman, E., and Stievenard, M.: Climate and
atmospheric history of the past 420,000 years from the Vostok ice core,
Antarctica, Nature, 399, 429–436,
https://doi.org/10.1038/20859, data archived at
the World Data Center for Paleoclimatology, Boulder, Colorado, USA., 1999.
Porter, S. C.: Some geological implications of average Quaternary glacial
conditions, Quaternary Res., 32, 245–261,
https://doi.org/10.1016/0033-5894(89)90092-6,
1989.
Porter, S. C. and Swanson, T. W.: Radiocarbon age constraints on rates of
advance and retreat of the Puget Lobe of the Cordilleran Ice Sheet
during the last glaciation, Quaternary Res., 50, 205–213,
https://doi.org/10.1006/qres.1998.2004,
1998.
Praetorius, S. K. and Mix, A. C.: Synchronization of North Pacific and
Greenland climates preceded abrupt deglacial warming, Sience, 345, 444–448,
https://doi.org/10.1126/science.1252000,
2014.
Prest, V. K., Grant, D. R., and Rampton, V. N.: Glacial map of Canada, “A”
Series Map 1253A, Geol. Surv. of Can., Ottawa, ON,
https://doi.org/10.4095/108979, 1968.
Reasoner, M. A., Osborn, G., and Rutter, N. W.: Age of the Crowfoot advance
in the Canadian Rocky Mountains: A glacial event coeval with the Younger
Dryas oscillation, Geology, 22, 439–442,
https://doi.org/10.1130/0091-7613(1994)022<0439:AOTCAI>2.3.CO;2,
1994.
Rignot, E., Mouginot, J., Larsen, C. F., Gim, Y., and Kirchner, D.:
Low-frequency radar sounding of temperate ice masses in Southern Alaska,
Geophys. Res. Lett., 40, 5399–5405,
https://doi.org/10.1002/2013gl057452,
2013.
Robert, B. L.: Modeling the Cordilleran ice sheet, Geogr. Phys. Quatern., 45, 287–299,
https://doi.org/10.7202/032876ar, 1991.
Rutter, N., Coronato, A., Helmens, K., Rabassa, J., and Zárate, M.:
Glaciations in North and South America from the Miocene to the Last Glacial
Maximum: Comparisons, Linkages and Uncertainties, Springer Briefs in Earth
System Sciences, Springer, Dordrecht,
https://doi.org/10.1007/978-94-007-4399-1,
2012.
Ryder, J. M., Fulton, R. J., and Clague, J. J.: The Cordilleran ice sheet and
the glacial geomorphology of southern and central British Colombia, Geogr.
Phys. Quatern., 45, 365–377,
https://doi.org/10.7202/032882ar, 1991.
Seguinot, J.: Spatial and seasonal effects of temperature variability in a
positive degree-day glacier surface mass-balance model, J. Glaciol., 59,
1202–1204,
https://doi.org/10.3189/2013JoG13J081,
2013.
Seguinot, J., Khroulev, C., Rogozhina, I., Stroeven, A. P., and Zhang, Q.:
The effect of climate forcing on numerical simulations of the Cordilleran ice
sheet at the Last Glacial Maximum, The Cryosphere, 8, 1087–1103,
https://doi.org/10.5194/tc-8-1087-2014,
2014.
Shea, J. M., Moore, R. D., and Stahl, K.: Derivation of melt factors from
glacier mass-balance records in western Canada, J. Glaciol., 55, 123–130,
https://doi.org/10.3189/002214309788608886,
2009.
Sissons, J. B.: The Loch Lomond Stadial in the British Isles, Nature, 280, 199–203,
https://doi.org/10.1038/280199a0, 1979.
Stea, R. R., Seaman, A. A., Pronk, T., Parkhill, M. A., Allard, S., and
Utting, D.: The Appalachian Glacier Complex in Maritime Canada, in: Dev.
Quaternary Sci., vol. 15, edited by: Ehlers, J., Gibbard, P. L., and
Hughes, P. D., Elsevier, Amsterdam, 631–659,
https://doi.org/10.1016/b978-0-444-53447-7.00048-9,
2011.
Stroeven, A. P., Fabel, D., Codilean, A. T., Kleman, J., Clague, J. J.,
Miguens-Rodriguez, M., and Xu, S.: Investigating the glacial history of the
northern sector of the Cordilleran ice sheet with cosmogenic 10Be
concentrations in quartz, Quaternary Sci. Rev., 29, 3630–3643,
https://doi.org/10.1016/j.quascirev.2010.07.010,
2010.
Stroeven, A. P., Fabel, D., Margold, M., Clague, J. J., and Xu, S.:
Investigating absolute chronologies of glacial advances in the NW sector of
the Cordilleran ice sheet with terrestrial in situ cosmogenic nuclides,
Quaternary Sci. Rev., 92, 429–443,
https://doi.org/10.1016/j.quascirev.2013.09.026,
2014.
Stroeven, A. P.,
Hättestrand, C., Kleman, J., Heyman, J., Fabel, D., Fredin, O.,
Goodfellow, B. W., Harbor, J. M., Jansen, J. D., Olsen, L., Caffee, M. W.,
Fink, D., Lundqvist, J., Rosqvist, G. C., Strömberg, B., and
Jansson, K. N.: Deglaciation of Fennoscandia, Quaternary Sci. Rev., in
review, 2015.
Stumpf, A. J., Broster, B. E., and Levson, V. M.: Multiphase flow of the late
Wisconsinan Cordilleran ice sheet in western Canada, Geol. Soc. Am. Bull.,
112, 1850–1863,
https://doi.org/10.1130/0016-7606(2000)112<1850:mfotlw>2.0.co;2,
2000.
Taylor, M., Hendy, I., and Pak, D.: Deglacial ocean warming and marine margin
retreat of the Cordilleran Ice Sheet in the North Pacific Ocean, Earth
Planet. Sc. Lett., 403, 89–98,
https://doi.org/10.1016/j.epsl.2014.06.026,
2014.
Taylor, M. A., Hendy, I. L., and Pak, D. K.: The California Current System as
a transmitter of millennial scale climate change on the northeastern Pacific
margin from 10 to 50 ka, Paleoceanography, 30, 1168–1182,
https://doi.org/10.1002/2014pa002738,
2015.
the PISM authors: PISM, a Parallel Ice Sheet Model, available at:
http://www.pism-docs.org (last access: 2015), 2015.
Troost, K. G.: The penultimate glaciation and mid-to late-pleistocene
stratigraphy in the Central Puget Lowland, Washington, in: 2014 GSA Annual
Meeting, Vancouver, 19–22 October 2014, abstract no. 138-9, 2014.
Tulaczyk, S., Kamb, W. B., and Engelhardt, H. F.: Basal mechanics of Ice
Stream B, west Antarctica: 1. Till mechanics, J. Geophys. Res., 105, 463,
https://doi.org/10.1029/1999jb900329,
2000.
Turner, D. G., Ward, B. C., Bond, J. D., Jensen, B. J., Froese, D. G.,
Telka, A. M., Zazula, G. D., and Bigelow, N. H.: Middle to Late Pleistocene
ice extents, tephrochronology and paleoenvironments of the White River area,
southwest Yukon, Quaternary Res., 75, 59–77,
https://doi.org/10.1016/j.quascirev.2013.05.011,
2013.
Ward, B. C., Bond, J. D., and Gosse, J. C.: Evidence for a 55–50 ka (early
Wisconsin) glaciation of the Cordilleran ice sheet, Yukon Territory, Canada,
Quaternary Res., 68, 141–150,
https://doi.org/10.1016/j.yqres.2007.04.002,
2007.
Ward, B. C., Bond, J. D., Froese, D., and Jensen, B.: Old Crow tephra
(140
Winkelmann, R., Martin, M. A., Haseloff, M., Albrecht, T., Bueler, E.,
Khroulev, C., and Levermann, A.: The Potsdam Parallel Ice Sheet Model
(PISM-PIK) – Part 1: Model description, The Cryosphere, 5, 715–726,
https://doi.org/10.5194/tc-5-715-2011,
2011.
Short summary
We use a numerical model based on approximated ice flow physics and calibrated against field-based evidence to present numerical simulations of multiple advance and retreat phases of the former Cordilleran ice sheet in North America during the last glacial cycle (120 000 to 0 years before present).
We use a numerical model based on approximated ice flow physics and calibrated against...
