A multidecadal analysis of föhn winds over Larsen C Ice Shelf from a combination of observations and modeling
The southward progression of ice shelf collapse in the Antarctic Peninsula is partially attributed to a strengthening of the circumpolar westerlies and the associated increase in föhn conditions over its eastern ice shelves. We used observations from an automatic weather station at Cabinet Inlet on...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/371967 2023-11-12T04:00:53+01:00 A multidecadal analysis of föhn winds over Larsen C Ice Shelf from a combination of observations and modeling Wiesenekker, J.M. Kuipers Munneke, P. van den Broeke, M.R. Smeets, C.J.P.P. Sub Dynamics Meteorology Marine and Atmospheric Research 2018 image/pdf https://dspace.library.uu.nl/handle/1874/371967 en eng 2073-4433 https://dspace.library.uu.nl/handle/1874/371967 info:eu-repo/semantics/OpenAccess Föhn Antarctic Peninsula Larsen ice shelf multidecadal analysis automatic weather station regional climate model Figures Article 2018 ftunivutrecht 2023-11-01T23:18:01Z The southward progression of ice shelf collapse in the Antarctic Peninsula is partially attributed to a strengthening of the circumpolar westerlies and the associated increase in föhn conditions over its eastern ice shelves. We used observations from an automatic weather station at Cabinet Inlet on the northern Larsen C ice shelf between 25 November 2014 and 31 December 2016 to describe föhn dynamics. Observed föhn frequency was compared to the latest version of the regional climate model RACMO2.3p2, run over the Antarctic Peninsula at 5.5-km horizontal resolution. A föhn identification scheme based on observed wind conditions was employed to check for model biases in föhn representation. Seasonal variation in total föhn event duration was resolved with sufficient skill. The analysis was extended to the model period (1979–2016) to obtain a multidecadal perspective of föhn occurrence over Larsen C ice shelf. Föhn occurrence at Cabinet Inlet strongly correlates with near-surface air temperature, and both are found to relate strongly to the location and strength of the Amundsen Sea Low. Furthermore, we demonstrated that föhn occurrence over Larsen C ice shelf shows high variability in space and time. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic Peninsula Ice Shelf Ice Shelves Larsen Ice Shelf Utrecht University Repository Amundsen Sea Antarctic Antarctic Peninsula Cabinet Inlet ENVELOPE(-63.500,-63.500,-66.250,-66.250) Larsen Ice Shelf ENVELOPE(-62.500,-62.500,-67.500,-67.500) The Antarctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Föhn Antarctic Peninsula Larsen ice shelf multidecadal analysis automatic weather station regional climate model Figures |
spellingShingle |
Föhn Antarctic Peninsula Larsen ice shelf multidecadal analysis automatic weather station regional climate model Figures Wiesenekker, J.M. Kuipers Munneke, P. van den Broeke, M.R. Smeets, C.J.P.P. A multidecadal analysis of föhn winds over Larsen C Ice Shelf from a combination of observations and modeling |
topic_facet |
Föhn Antarctic Peninsula Larsen ice shelf multidecadal analysis automatic weather station regional climate model Figures |
description |
The southward progression of ice shelf collapse in the Antarctic Peninsula is partially attributed to a strengthening of the circumpolar westerlies and the associated increase in föhn conditions over its eastern ice shelves. We used observations from an automatic weather station at Cabinet Inlet on the northern Larsen C ice shelf between 25 November 2014 and 31 December 2016 to describe föhn dynamics. Observed föhn frequency was compared to the latest version of the regional climate model RACMO2.3p2, run over the Antarctic Peninsula at 5.5-km horizontal resolution. A föhn identification scheme based on observed wind conditions was employed to check for model biases in föhn representation. Seasonal variation in total föhn event duration was resolved with sufficient skill. The analysis was extended to the model period (1979–2016) to obtain a multidecadal perspective of föhn occurrence over Larsen C ice shelf. Föhn occurrence at Cabinet Inlet strongly correlates with near-surface air temperature, and both are found to relate strongly to the location and strength of the Amundsen Sea Low. Furthermore, we demonstrated that föhn occurrence over Larsen C ice shelf shows high variability in space and time. |
author2 |
Sub Dynamics Meteorology Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Wiesenekker, J.M. Kuipers Munneke, P. van den Broeke, M.R. Smeets, C.J.P.P. |
author_facet |
Wiesenekker, J.M. Kuipers Munneke, P. van den Broeke, M.R. Smeets, C.J.P.P. |
author_sort |
Wiesenekker, J.M. |
title |
A multidecadal analysis of föhn winds over Larsen C Ice Shelf from a combination of observations and modeling |
title_short |
A multidecadal analysis of föhn winds over Larsen C Ice Shelf from a combination of observations and modeling |
title_full |
A multidecadal analysis of föhn winds over Larsen C Ice Shelf from a combination of observations and modeling |
title_fullStr |
A multidecadal analysis of föhn winds over Larsen C Ice Shelf from a combination of observations and modeling |
title_full_unstemmed |
A multidecadal analysis of föhn winds over Larsen C Ice Shelf from a combination of observations and modeling |
title_sort |
multidecadal analysis of föhn winds over larsen c ice shelf from a combination of observations and modeling |
publishDate |
2018 |
url |
https://dspace.library.uu.nl/handle/1874/371967 |
long_lat |
ENVELOPE(-63.500,-63.500,-66.250,-66.250) ENVELOPE(-62.500,-62.500,-67.500,-67.500) |
geographic |
Amundsen Sea Antarctic Antarctic Peninsula Cabinet Inlet Larsen Ice Shelf The Antarctic |
geographic_facet |
Amundsen Sea Antarctic Antarctic Peninsula Cabinet Inlet Larsen Ice Shelf The Antarctic |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Ice Shelf Ice Shelves Larsen Ice Shelf |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Ice Shelf Ice Shelves Larsen Ice Shelf |
op_relation |
2073-4433 https://dspace.library.uu.nl/handle/1874/371967 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782328957114253312 |