Spatial structures in the heat budget of the Antarctic atmospheric boundary layer
Output from the regional climate model RACMO2/ANT is used to calculate the heat budget of the Antarctic atmospheric boundary layer (ABL). The main feature of the wintertime Antarctic ABL is a persistent temperature deficit compared to the free atmosphere. The magnitude of this deficit is controlled...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2008
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-2-1-2008 https://noa.gwlb.de/receive/cop_mods_00031840 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031794/tc-2-1-2008.pdf https://tc.copernicus.org/articles/2/1/2008/tc-2-1-2008.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00031840 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00031840 2023-05-15T13:36:44+02:00 Spatial structures in the heat budget of the Antarctic atmospheric boundary layer van de Berg, W. J. van den Broeke, M. R. van Meijgaard, E. 2008-01 electronic https://doi.org/10.5194/tc-2-1-2008 https://noa.gwlb.de/receive/cop_mods_00031840 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031794/tc-2-1-2008.pdf https://tc.copernicus.org/articles/2/1/2008/tc-2-1-2008.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-2-1-2008 https://noa.gwlb.de/receive/cop_mods_00031840 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031794/tc-2-1-2008.pdf https://tc.copernicus.org/articles/2/1/2008/tc-2-1-2008.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2008 ftnonlinearchiv https://doi.org/10.5194/tc-2-1-2008 2022-02-08T22:46:32Z Output from the regional climate model RACMO2/ANT is used to calculate the heat budget of the Antarctic atmospheric boundary layer (ABL). The main feature of the wintertime Antarctic ABL is a persistent temperature deficit compared to the free atmosphere. The magnitude of this deficit is controlled by the heat budget. During winter, transport of heat towards the surface by turbulence and net longwave emission are the primary ABL cooling terms. These processes show horizontal spatial variability only on continental scales. Vertical and horizontal, i.e. along-slope, advection of heat are the main warming terms. Over regions with convex ice sheet topography, i.e. domes and ridges, warming by downward vertical advection is enhanced due to divergence of the ABL wind field. Horizontal advection balances excess warming caused by vertical advection, hence the temperature deficit in the ABL weakens over domes and ridges along the prevailing katabatic wind. Conversely, vertical advection is reduced in regions with concave topography, i.e. valleys, where the ABL temperature deficit enlarges along the katabatic wind. Along the coast, horizontal and vertical advection is governed by the inability of the large-scale circulation to adapt to small scale topographic features. Meso-scale topographic structures have thus a strong impact on the ABL winter temperature, besides latitude and surface elevation. During summer, this mechanism is much weaker, and the horizontal variability of ABL temperatures is smaller. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic The Antarctic The Cryosphere 2 1 1 12 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung van de Berg, W. J. van den Broeke, M. R. van Meijgaard, E. Spatial structures in the heat budget of the Antarctic atmospheric boundary layer |
topic_facet |
article Verlagsveröffentlichung |
description |
Output from the regional climate model RACMO2/ANT is used to calculate the heat budget of the Antarctic atmospheric boundary layer (ABL). The main feature of the wintertime Antarctic ABL is a persistent temperature deficit compared to the free atmosphere. The magnitude of this deficit is controlled by the heat budget. During winter, transport of heat towards the surface by turbulence and net longwave emission are the primary ABL cooling terms. These processes show horizontal spatial variability only on continental scales. Vertical and horizontal, i.e. along-slope, advection of heat are the main warming terms. Over regions with convex ice sheet topography, i.e. domes and ridges, warming by downward vertical advection is enhanced due to divergence of the ABL wind field. Horizontal advection balances excess warming caused by vertical advection, hence the temperature deficit in the ABL weakens over domes and ridges along the prevailing katabatic wind. Conversely, vertical advection is reduced in regions with concave topography, i.e. valleys, where the ABL temperature deficit enlarges along the katabatic wind. Along the coast, horizontal and vertical advection is governed by the inability of the large-scale circulation to adapt to small scale topographic features. Meso-scale topographic structures have thus a strong impact on the ABL winter temperature, besides latitude and surface elevation. During summer, this mechanism is much weaker, and the horizontal variability of ABL temperatures is smaller. |
format |
Article in Journal/Newspaper |
author |
van de Berg, W. J. van den Broeke, M. R. van Meijgaard, E. |
author_facet |
van de Berg, W. J. van den Broeke, M. R. van Meijgaard, E. |
author_sort |
van de Berg, W. J. |
title |
Spatial structures in the heat budget of the Antarctic atmospheric boundary layer |
title_short |
Spatial structures in the heat budget of the Antarctic atmospheric boundary layer |
title_full |
Spatial structures in the heat budget of the Antarctic atmospheric boundary layer |
title_fullStr |
Spatial structures in the heat budget of the Antarctic atmospheric boundary layer |
title_full_unstemmed |
Spatial structures in the heat budget of the Antarctic atmospheric boundary layer |
title_sort |
spatial structures in the heat budget of the antarctic atmospheric boundary layer |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/tc-2-1-2008 https://noa.gwlb.de/receive/cop_mods_00031840 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031794/tc-2-1-2008.pdf https://tc.copernicus.org/articles/2/1/2008/tc-2-1-2008.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet The Cryosphere |
genre_facet |
Antarc* Antarctic Ice Sheet 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-2-1-2008 https://noa.gwlb.de/receive/cop_mods_00031840 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031794/tc-2-1-2008.pdf https://tc.copernicus.org/articles/2/1/2008/tc-2-1-2008.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-2-1-2008 |
container_title |
The Cryosphere |
container_volume |
2 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
12 |
_version_ |
1766083003801403392 |