The Cryosphere
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Papers 2,062
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Abstract. We introduce an algorithm (Watta), which automatically calculates supraglacial lake bathymmetry and potential ice layers along tracks of the ICESat-2 laser altimeter. Watta uses photon heights estimated by the ICESat-2 ATL03 product and extracts supraglacial lake surface, bottom, corrected depth and (sub)surface ice cover in addition to producing surface heights at the native resolution of the ATL03 photon cloud. These measurements are used to constrain empirical estimates of lake dept...
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#1Rachel Diamond (Imperial College London)
#2Louise C. Sime (BAS: British Antarctic Survey)H-Index: 23
Last. Maria-Vittoria Guarino (BAS: British Antarctic Survey)H-Index: 8
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Abstract. HadGEM3 is the first coupled climate model to simulate an ice-free Arctic during the Last Interglacial (LIG), 127 000 years ago. This simulation appears to yield accurate Arctic surface temperatures during the summer season. Here, we investigate the causes and impacts of this extreme simulated ice loss. We find that the summer ice melt is predominantly driven by thermodynamic processes: atmospheric and ocean circulation changes do not significantly contribute to the ice loss. We demons...
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#1Alain Royer (Université de Sherbrooke)H-Index: 31
#2Alexandre RoyH-Index: 19
Last. Alexandre Langlois (Université de Sherbrooke)H-Index: 21
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Abstract. Continuous and spatially distributed data of snow mass (water equivalent of snow cover, SWE) from automatic ground-based measurements are increasingly required for climate change studies and for hydrological applications (snow hydrological-model improvement and data assimilation). We present and compare four new-generation sensors, now commercialized, that are non-invasive and based on different radiations that interact with snow for SWE monitoring: cosmic-ray neutron probe (CRNP), gam...
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#1Alexander D. Fraser (UTAS: University of Tasmania)H-Index: 16
#2Robert A. Massom (UTAS: University of Tasmania)H-Index: 44
Last. R Porter-Smith (UTAS: University of Tasmania)H-Index: 8
view all 10 authors...
Abstract. Landfast sea ice (fast ice) is an important though poorly-understood component of the cryosphere on the Antarctic continental shelf, where it plays a key role in atmosphere-ocean-ice sheet interaction and coupled ecological and biogeochemical processes. Here, we present a first in-depth baseline analysis of variability and change in circum-Antarctic fast-ice distribution (including its relationship to bathymetry), based on a new high-resolution satellite-derived time series for the per...
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#1Johannes Landmann (ETH Zurich: ETH Zurich)H-Index: 4
#2Hans R. Künsch (ETH Zurich: ETH Zurich)H-Index: 33
Last. Daniel Farinotti (ETH Zurich: ETH Zurich)H-Index: 32
view all 6 authors...
Abstract. Glaciers fulfil important short-term functions like drinking water supply and they are important indicators of climate change. This is why the interest in near real-time mass balance nowcasting is high. Here, we address this interest and provide an evaluation of seven continuous observations of point mass balance based on on-line cameras transmitting images every 20 minutes on three Swiss glaciers during summer 2019. Like this, we read 352 near real-time daily point mass balances in to...
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#1Melanie MarochovH-Index: 1
#2Chris R. StokesH-Index: 54
Last. Patrice CarbonneauH-Index: 25
view all 3 authors...
Abstract. A wealth of research has focused on elucidating the key controls on mass loss from the Greenland and Antarctic ice sheets in response to climate forcing, specifically in relation to the drivers of marine-terminating outlet glacier change. The manual methods traditionally used to monitor change in satellite imagery of marine-terminating outlet glaciers are time-consuming and can be subjective, especially where melange exists at the terminus. Recent advances in deep learning applied to i...
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#1Greg H Leonard (University of Otago)H-Index: 2
#2Kate E. Turner (NIWA: National Institute of Water and Atmospheric Research)H-Index: 1
Last. Inga J. Smith (University of Otago)H-Index: 16
view all 5 authors...
Abstract. McMurdo Sound sea ice can generally be partitioned into two regimes: (1) a stable fast-ice cover, forming south of approximately 77.6° S around March/April, then breaking out the following January/February; and, (2) a more dynamic region north of 77.6° S that the McMurdo Sound and Ross Sea polynyas regularly impact. In 2019, a stable fast-ice cover formed unusually late due to repeated breakout events. We analyse the 2019 sea-ice conditions and relate them to southerly wind events usin...
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#1Baptiste Frankinet (ULB: Université Libre de Bruxelles)H-Index: 1
#2Thomas Lecocq (Royal Observatory of Belgium)H-Index: 17
Last. Thierry Camelbeeck (Royal Observatory of Belgium)H-Index: 21
view all 3 authors...
Abstract. Icequakes are the result of processes occurring within the ice mass, or between the ice and its environment. Studying icequakes provide a unique view on the ice dynamics, specifically on the basal conditions. Changes in conditions due to environmental, or climate, changes, are reflected in icequakes. Counting and characterizing icequakes is thus essential to monitor them. Most of the icequakes recorded by the seismic station at the Belgian Princess Elisabeth Antarctica Station (PE) hav...
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#1Marika M. Holland (NCAR: National Center for Atmospheric Research)H-Index: 68
#2David Clemens-Sewall (Dartmouth College)H-Index: 3
Last. Melinda Webster (UAF: University of Alaska Fairbanks)H-Index: 12
view all 8 authors...
Abstract. We assess the influence of snow on sea ice in experiments using the Community Earth System Model, version 2 for a pre-industrial and a 2xCO2 climate state. In the pre-industrial climate, we find that increasing simulated snow accumulation on sea ice results in thicker sea ice and a cooler climate in both hemispheres. The sea ice mass budget response differs fundamentally between the two hemispheres. In the Arctic, increasing snow results in a decrease in both sea ice growth and sea ice...
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#1Zacharie Barrou Dumont (UFTMP: Federal University of Toulouse Midi-Pyrénées)H-Index: 1
#2Simon Gascoin (UFTMP: Federal University of Toulouse Midi-Pyrénées)H-Index: 26
Last. Samuel Morin (UGA: Grenoble Alpes University)H-Index: 29
view all 10 authors...
Abstract. The High Resolution Snow & Ice Monitoring Service was launched in 2020 to provide near real time, pan-European snow and ice information at 20 m resolution from Sentinel-2 observations. Here we present an evaluation of the snow detection using a database of snow depth observations from 1764 stations across Europe over the hydrological year 2016–2017. We find a good agreement between both datasets with an accuracy of 94 % (proportion of correct classifications) and kappa of 0.80. More ac...
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