The surface energy balance during foehn events at Joyce Glacier, McMurdo Dry Valleys, Antarctica
The McMurdo Dry Valleys (MDV) are a polar desert, where glacial melt is the main source of water to streams and the ecosystem. Summer air temperatures are typically close to zero, and therefore foehn events can have a large impact on the meltwater production. A 14-month record of automatic weather s...
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Copernicus Publications
2022
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00064093 2023-05-15T13:49:22+02:00 The surface energy balance during foehn events at Joyce Glacier, McMurdo Dry Valleys, Antarctica Hofsteenge, Marte G. Cullen, Nicolas J. Reijmer, Carleen H. van den Broeke, Michiel Katurji, Marwan Orwin, John F. 2022-12 electronic https://doi.org/10.5194/tc-16-5041-2022 https://noa.gwlb.de/receive/cop_mods_00064093 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00062966/tc-16-5041-2022.pdf https://tc.copernicus.org/articles/16/5041/2022/tc-16-5041-2022.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-16-5041-2022 https://noa.gwlb.de/receive/cop_mods_00064093 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00062966/tc-16-5041-2022.pdf https://tc.copernicus.org/articles/16/5041/2022/tc-16-5041-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/tc-16-5041-2022 2022-12-26T00:12:59Z The McMurdo Dry Valleys (MDV) are a polar desert, where glacial melt is the main source of water to streams and the ecosystem. Summer air temperatures are typically close to zero, and therefore foehn events can have a large impact on the meltwater production. A 14-month record of automatic weather station (AWS) data on Joyce Glacier is used to force a 1D surface energy balance model to study the impact of foehn events on the energy balance. AWS data and output of the Antarctic Mesoscale Prediction System (AMPS) on a 1.7 km grid are used to detect foehn events at the AWS site. Foehn events at Joyce Glacier occur under the presence of cyclones over the Ross Sea. The location of Joyce Glacier on the leeward side of the Royal Society Range during these synoptic events causes foehn warming through isentropic drawdown. This mechanism differs from the foehn warming through gap flow that was earlier found for other regions in the MDV and highlights the complex interaction of synoptic flow with local topography of the MDV. Shortwave radiation is the primary control on melt at Joyce Glacier, and melt often occurs with subzero air temperatures. During foehn events, melt rates are enhanced, contributing to 23 % of the total annual melt. Foehn winds cause a switch from a diurnal stability regime in the atmospheric surface layer to a continuous energy input from sensible heat flux throughout the day. The sensible heating during foehn, through an increase in turbulent mixing resulting from gustier and warmer wind conditions, is largely compensated for by extra heat losses through sublimation. Melt rates are enhanced through an additional energy surplus from a reduced albedo during foehn. Article in Journal/Newspaper Antarc* Antarctic Antarctica McMurdo Dry Valleys polar desert Ross Sea The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic Joyce Glacier ENVELOPE(163.700,163.700,-78.017,-78.017) McMurdo Dry Valleys Ross Sea Royal Society Range ENVELOPE(162.667,162.667,-78.167,-78.167) The Antarctic The Cryosphere 16 12 5041 5059 |
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article Verlagsveröffentlichung Hofsteenge, Marte G. Cullen, Nicolas J. Reijmer, Carleen H. van den Broeke, Michiel Katurji, Marwan Orwin, John F. The surface energy balance during foehn events at Joyce Glacier, McMurdo Dry Valleys, Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
The McMurdo Dry Valleys (MDV) are a polar desert, where glacial melt is the main source of water to streams and the ecosystem. Summer air temperatures are typically close to zero, and therefore foehn events can have a large impact on the meltwater production. A 14-month record of automatic weather station (AWS) data on Joyce Glacier is used to force a 1D surface energy balance model to study the impact of foehn events on the energy balance. AWS data and output of the Antarctic Mesoscale Prediction System (AMPS) on a 1.7 km grid are used to detect foehn events at the AWS site. Foehn events at Joyce Glacier occur under the presence of cyclones over the Ross Sea. The location of Joyce Glacier on the leeward side of the Royal Society Range during these synoptic events causes foehn warming through isentropic drawdown. This mechanism differs from the foehn warming through gap flow that was earlier found for other regions in the MDV and highlights the complex interaction of synoptic flow with local topography of the MDV. Shortwave radiation is the primary control on melt at Joyce Glacier, and melt often occurs with subzero air temperatures. During foehn events, melt rates are enhanced, contributing to 23 % of the total annual melt. Foehn winds cause a switch from a diurnal stability regime in the atmospheric surface layer to a continuous energy input from sensible heat flux throughout the day. The sensible heating during foehn, through an increase in turbulent mixing resulting from gustier and warmer wind conditions, is largely compensated for by extra heat losses through sublimation. Melt rates are enhanced through an additional energy surplus from a reduced albedo during foehn. |
format |
Article in Journal/Newspaper |
author |
Hofsteenge, Marte G. Cullen, Nicolas J. Reijmer, Carleen H. van den Broeke, Michiel Katurji, Marwan Orwin, John F. |
author_facet |
Hofsteenge, Marte G. Cullen, Nicolas J. Reijmer, Carleen H. van den Broeke, Michiel Katurji, Marwan Orwin, John F. |
author_sort |
Hofsteenge, Marte G. |
title |
The surface energy balance during foehn events at Joyce Glacier, McMurdo Dry Valleys, Antarctica |
title_short |
The surface energy balance during foehn events at Joyce Glacier, McMurdo Dry Valleys, Antarctica |
title_full |
The surface energy balance during foehn events at Joyce Glacier, McMurdo Dry Valleys, Antarctica |
title_fullStr |
The surface energy balance during foehn events at Joyce Glacier, McMurdo Dry Valleys, Antarctica |
title_full_unstemmed |
The surface energy balance during foehn events at Joyce Glacier, McMurdo Dry Valleys, Antarctica |
title_sort |
surface energy balance during foehn events at joyce glacier, mcmurdo dry valleys, antarctica |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-5041-2022 https://noa.gwlb.de/receive/cop_mods_00064093 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00062966/tc-16-5041-2022.pdf https://tc.copernicus.org/articles/16/5041/2022/tc-16-5041-2022.pdf |
long_lat |
ENVELOPE(163.700,163.700,-78.017,-78.017) ENVELOPE(162.667,162.667,-78.167,-78.167) |
geographic |
Antarctic Joyce Glacier McMurdo Dry Valleys Ross Sea Royal Society Range The Antarctic |
geographic_facet |
Antarctic Joyce Glacier McMurdo Dry Valleys Ross Sea Royal Society Range The Antarctic |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys polar desert Ross Sea The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys polar desert Ross Sea 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-16-5041-2022 https://noa.gwlb.de/receive/cop_mods_00064093 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00062966/tc-16-5041-2022.pdf https://tc.copernicus.org/articles/16/5041/2022/tc-16-5041-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-16-5041-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
12 |
container_start_page |
5041 |
op_container_end_page |
5059 |
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1766251249068408832 |