Performance of MAR (v3.11) in simulating the drifting-snow climate and surface mass balance of Adélie Land, East Antarctica
Charles Amory,Charles Amory,Christoph Kittel,Louis Le Toumelin,Cécile Agosta,Alison Delhasse,Vincent Favier,Xavier Fettweis +7 more
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In this paper, a new version of the drifting-snow scheme currently embedded in the regional climate model MAR (v3.11) is extensively described and several important modifications relative to previous version have been implemented.Abstract:
. Drifting snow, or the wind-driven transport of snow particles originating from clouds and the surface below and above 2 m above ground and their concurrent sublimation, is a poorly documented process on the Antarctic ice sheet, which is inherently lacking in most climate models. Since drifting snow mostly results from erosion of surface particles, a comprehensive evaluation of this process in climate models requires a concurrent assessment of simulated drifting-snow transport and the surface mass balance (SMB). In this paper a new version of the drifting-snow scheme currently embedded in the regional climate model MAR (v3.11) is extensively described. Several important modifications relative to previous version have been implemented and include notably a parameterization for drifting-snow compaction of the uppermost snowpack layer, differentiated snow density at deposition between precipitation and drifting snow, and a rewrite of the threshold friction velocity above which snow erosion initiates. Model results at high resolution (10 km) over Adelie Land, East Antarctica, for the period 2004–2018 are presented and evaluated against available near-surface meteorological observations at half-hourly resolution and annual SMB estimates. The evaluation demonstrates that MAR resolves the local drifting-snow frequency and transport up to the scale of the drifting-snow event and captures the resulting observed climate and SMB variability, suggesting that this model version can be used for continent-wide applications.read more
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Diverging future surface mass balance between the Antarctic ice shelves and grounded ice sheet
Christoph Kittel,Charles Amory,Charles Amory,Cécile Agosta,Nicolas C. Jourdain,Stefan Hofer,Alison Delhasse,Sébastien Doutreloup,Pierre-Vincent Huot,Charlotte Lang,Charlotte Lang,Thierry Fichefet,Xavier Fettweis +12 more
TL;DR: In this paper, the authors investigated the AIS sensitivity to different warmings with an ensemble of four simulations performed with the polar regional climate model Modele Atmospherique Regional (MAR) forced by two CMIP5 and twoCMIP6 models over 1981-2100.
Posted ContentDOI
Greenland ice sheet mass balance from 1840 through next week
Kenneth D. Mankoff,Xavier Fettweis,Peter L. Langen,Martin Stendel,Kristian K. Kjeldsen,Nanna B. Karlsson,Brice Noël,Michiel R. van den Broeke,Anne M. Solgaard,William Colgan,Jason E. Box,Sebastian B. Simonsen,Michalea D. King,Andreas P. Ahlstrøm,Signe B. Andersen,Robert S. Fausto +15 more
TL;DR: Mankoff et al. as discussed by the authors used the input-output (IO) method to estimate mass change from 1840 through next week and provided an annual estimate of Greenland ice sheet mass balance from 1840-through 1985 and a daily estimate at sector and region scale from 1986 through the next week.
Journal ArticleDOI
Simulations of firn processes over the Greenland and Antarctic ice sheets: 1980–2021
TL;DR: In this paper, the authors presented new simulations of firn processes over the Greenland and Antarctic ice sheets (GrIS and AIS) using the Community Firn Model and atmospheric reanalysis variables for more than four decades.
Journal ArticleDOI
Observations and simulations of new snow density in the drifting snow-dominated environment of Antarctica
Nander Wever,Eric Keenan,Charles Amory,Michael Lehning,Armin Sigmund,Hendrik Huwald,Jan T. M. Lenaerts +6 more
TL;DR: In this paper , the authors present new field data of manual measurements, repeat terrestrial laser scanning and snow micro-penetrometry from Dronning Maud Land, Antarctica, showing the density of new snow accumulations.
Journal ArticleDOI
Sensitivity of the surface energy budget to drifting snow as simulated by MAR in coastal Adelie Land, Antarctica
Louis Le Toumelin,Charles Amory,Charles Amory,Vincent Favier,Christoph Kittel,Stefan Hofer,Xavier Fettweis,Hubert Gallée,Vinay Kayetha +8 more
TL;DR: In this article, the authors used the regional climate model MAR (v3.11) at 10 km horizontal resolution, forced by ERA5 reanalysis over a 9-year period (2010-2018) to study the impact of drifting snow (designating here the wind-driven transport of snow particles below and above 2 m) on the near-surface atmosphere and surface in Adelie Land, East Antarctica.
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