Modelling snowdrift sublimation on an Antarctic ice shelf
In this paper, we estimate the contribution of snowdrift sublimation (SUds) to the surface mass balance at Neumayer, located on the Ekström ice shelf in Eastern Antarctica. A single column version of the RACMO2-ANT model is used as a physical interpolation tool of high-quality radiosonde and surface...
Published in: | The Cryosphere |
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Copernicus Publications
2010
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00028947 2023-05-15T13:36:44+02:00 Modelling snowdrift sublimation on an Antarctic ice shelf Lenaerts, J. T. M. van den Broeke, M. R. Déry, S. J. König-Langlo, G. Ettema, J. Munneke, P. K. 2010-05 electronic https://doi.org/10.5194/tc-4-179-2010 https://noa.gwlb.de/receive/cop_mods_00028947 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028902/tc-4-179-2010.pdf https://tc.copernicus.org/articles/4/179/2010/tc-4-179-2010.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-4-179-2010 https://noa.gwlb.de/receive/cop_mods_00028947 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028902/tc-4-179-2010.pdf https://tc.copernicus.org/articles/4/179/2010/tc-4-179-2010.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2010 ftnonlinearchiv https://doi.org/10.5194/tc-4-179-2010 2022-02-08T22:47:58Z In this paper, we estimate the contribution of snowdrift sublimation (SUds) to the surface mass balance at Neumayer, located on the Ekström ice shelf in Eastern Antarctica. A single column version of the RACMO2-ANT model is used as a physical interpolation tool of high-quality radiosonde and surface measurements for a 15-yr period (1993–2007), and combined with a routine to calculate snowdrift sublimation and horizontal snow transport. The site is characterised by a relatively mild, wet and windy climate, so snowdrift is a common phenomenon. The modelled timing and frequency of snowdrift events compares well with observations. This is further illustrated by an additional simulation for Kohnen base, where the timing of snowdrift is realistic, although the modelled horizontal transport is overestimated. Snowdrift sublimation is mainly dependent on wind speed, but also on relative humidity and temperature. During high wind speeds, SUds saturates and cools the air, limiting its own strength. We estimate that SUds removes around 16%±8% of the accumulated snow from the surface. The total sublimation more than triples when snowdrift is considered, although snowdrift sublimation limits sublimation at the surface. SUds shows a strong seasonal cycle, as well as large inter-annual variability. This variability can be related to the variability of the atmospheric conditions in the surface layer. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic Ekström Ice Shelf ENVELOPE(-8.000,-8.000,-71.000,-71.000) Kohnen ENVELOPE(0.000,0.000,-75.000,-75.000) Neumayer The Cryosphere 4 2 179 190 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Lenaerts, J. T. M. van den Broeke, M. R. Déry, S. J. König-Langlo, G. Ettema, J. Munneke, P. K. Modelling snowdrift sublimation on an Antarctic ice shelf |
topic_facet |
article Verlagsveröffentlichung |
description |
In this paper, we estimate the contribution of snowdrift sublimation (SUds) to the surface mass balance at Neumayer, located on the Ekström ice shelf in Eastern Antarctica. A single column version of the RACMO2-ANT model is used as a physical interpolation tool of high-quality radiosonde and surface measurements for a 15-yr period (1993–2007), and combined with a routine to calculate snowdrift sublimation and horizontal snow transport. The site is characterised by a relatively mild, wet and windy climate, so snowdrift is a common phenomenon. The modelled timing and frequency of snowdrift events compares well with observations. This is further illustrated by an additional simulation for Kohnen base, where the timing of snowdrift is realistic, although the modelled horizontal transport is overestimated. Snowdrift sublimation is mainly dependent on wind speed, but also on relative humidity and temperature. During high wind speeds, SUds saturates and cools the air, limiting its own strength. We estimate that SUds removes around 16%±8% of the accumulated snow from the surface. The total sublimation more than triples when snowdrift is considered, although snowdrift sublimation limits sublimation at the surface. SUds shows a strong seasonal cycle, as well as large inter-annual variability. This variability can be related to the variability of the atmospheric conditions in the surface layer. |
format |
Article in Journal/Newspaper |
author |
Lenaerts, J. T. M. van den Broeke, M. R. Déry, S. J. König-Langlo, G. Ettema, J. Munneke, P. K. |
author_facet |
Lenaerts, J. T. M. van den Broeke, M. R. Déry, S. J. König-Langlo, G. Ettema, J. Munneke, P. K. |
author_sort |
Lenaerts, J. T. M. |
title |
Modelling snowdrift sublimation on an Antarctic ice shelf |
title_short |
Modelling snowdrift sublimation on an Antarctic ice shelf |
title_full |
Modelling snowdrift sublimation on an Antarctic ice shelf |
title_fullStr |
Modelling snowdrift sublimation on an Antarctic ice shelf |
title_full_unstemmed |
Modelling snowdrift sublimation on an Antarctic ice shelf |
title_sort |
modelling snowdrift sublimation on an antarctic ice shelf |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/tc-4-179-2010 https://noa.gwlb.de/receive/cop_mods_00028947 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028902/tc-4-179-2010.pdf https://tc.copernicus.org/articles/4/179/2010/tc-4-179-2010.pdf |
long_lat |
ENVELOPE(-8.000,-8.000,-71.000,-71.000) ENVELOPE(0.000,0.000,-75.000,-75.000) |
geographic |
Antarctic Ekström Ice Shelf Kohnen Neumayer |
geographic_facet |
Antarctic Ekström Ice Shelf Kohnen Neumayer |
genre |
Antarc* Antarctic Antarctica Ice Shelf The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-4-179-2010 https://noa.gwlb.de/receive/cop_mods_00028947 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028902/tc-4-179-2010.pdf https://tc.copernicus.org/articles/4/179/2010/tc-4-179-2010.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-4-179-2010 |
container_title |
The Cryosphere |
container_volume |
4 |
container_issue |
2 |
container_start_page |
179 |
op_container_end_page |
190 |
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1766083118137081856 |