The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements
Föhn winds are warm, strong, downslope winds on the lee side of mountains, which can last from several hours to a few days. Recently Föhn conditions over the ice shelves on the eastern side of the Antarctic Peninsula (AP) mountains have attracted particular interest in the polar science community. H...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://pure.uhi.ac.uk/en/publications/1ea2c0da-62c5-475f-9a1f-13db7b9e9df1 https://doi.org/10.1029/2020JD033748 https://pureadmin.uhi.ac.uk/ws/files/15357617/2020JD033748.pdf |
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ftuhipublicatio:oai:pure.atira.dk:publications/1ea2c0da-62c5-475f-9a1f-13db7b9e9df1 2024-06-23T07:45:59+00:00 The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements Kirchgaessner, Amelie King, John Anderson, Philip 2021-02-17 application/pdf https://pure.uhi.ac.uk/en/publications/1ea2c0da-62c5-475f-9a1f-13db7b9e9df1 https://doi.org/10.1029/2020JD033748 https://pureadmin.uhi.ac.uk/ws/files/15357617/2020JD033748.pdf eng eng https://pure.uhi.ac.uk/en/publications/1ea2c0da-62c5-475f-9a1f-13db7b9e9df1 info:eu-repo/semantics/openAccess Kirchgaessner , A , King , J & Anderson , P 2021 , ' The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements ' , JGR Atmospheres , vol. 126 , no. 4 . https://doi.org/10.1029/2020JD033748 article 2021 ftuhipublicatio https://doi.org/10.1029/2020JD033748 2024-06-03T23:48:37Z Föhn winds are warm, strong, downslope winds on the lee side of mountains, which can last from several hours to a few days. Recently Föhn conditions over the ice shelves on the eastern side of the Antarctic Peninsula (AP) mountains have attracted particular interest in the polar science community. Here, on the Larsen ice shelves (LIS) they provide atmospheric conditions for significant warming over the ice shelf which are thought to have clearly contributed to the collapse of Larsen A and B ice shelves in 1995 and 2002, respectively. We examine the representation of Föhn conditions as observed by measurements at an Automatic Weather Station (AWS) located on Cole Peninsula (CP) on the east of the AP mountain range in 2011. We introduce criteria to identify Föhn conditions and analyze the meteorological conditions at the AWS location with regard to the influence of Föhn overall, and on a seasonal and monthly basis. We consult two cases to highlight the seasonally different effects Föhn can have. We also compare our findings with data obtained in other studies, e.g., an AWS in a comparable location at Flask Glacier (FG). Measurements obtained at a crest AWS on the Avery Plateau (AV), and the analysis of conditions upstream using the Froude number help to put observations at CP into a wider context. Most importantly our data show that Föhn conditions can raise the air temperature to above freezing, and thus trigger melt/sublimation even in winter. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Flask Glacier Ice Shelf Ice Shelves University of the Highlands and Islands: Research Database of UHI Antarctic Antarctic Peninsula Avery ENVELOPE(-65.433,-65.433,-66.883,-66.883) Avery Plateau ENVELOPE(-65.433,-65.433,-66.883,-66.883) Cole peninsula ENVELOPE(-63.969,-63.969,-66.845,-66.845) Flask Glacier ENVELOPE(-62.792,-62.792,-65.762,-65.762) The Antarctic Journal of Geophysical Research: Atmospheres 126 4 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
description |
Föhn winds are warm, strong, downslope winds on the lee side of mountains, which can last from several hours to a few days. Recently Föhn conditions over the ice shelves on the eastern side of the Antarctic Peninsula (AP) mountains have attracted particular interest in the polar science community. Here, on the Larsen ice shelves (LIS) they provide atmospheric conditions for significant warming over the ice shelf which are thought to have clearly contributed to the collapse of Larsen A and B ice shelves in 1995 and 2002, respectively. We examine the representation of Föhn conditions as observed by measurements at an Automatic Weather Station (AWS) located on Cole Peninsula (CP) on the east of the AP mountain range in 2011. We introduce criteria to identify Föhn conditions and analyze the meteorological conditions at the AWS location with regard to the influence of Föhn overall, and on a seasonal and monthly basis. We consult two cases to highlight the seasonally different effects Föhn can have. We also compare our findings with data obtained in other studies, e.g., an AWS in a comparable location at Flask Glacier (FG). Measurements obtained at a crest AWS on the Avery Plateau (AV), and the analysis of conditions upstream using the Froude number help to put observations at CP into a wider context. Most importantly our data show that Föhn conditions can raise the air temperature to above freezing, and thus trigger melt/sublimation even in winter. |
format |
Article in Journal/Newspaper |
author |
Kirchgaessner, Amelie King, John Anderson, Philip |
spellingShingle |
Kirchgaessner, Amelie King, John Anderson, Philip The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements |
author_facet |
Kirchgaessner, Amelie King, John Anderson, Philip |
author_sort |
Kirchgaessner, Amelie |
title |
The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements |
title_short |
The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements |
title_full |
The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements |
title_fullStr |
The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements |
title_full_unstemmed |
The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements |
title_sort |
impact of föhn conditions across the antarctic peninsula on local meteorology based on aws measurements |
publishDate |
2021 |
url |
https://pure.uhi.ac.uk/en/publications/1ea2c0da-62c5-475f-9a1f-13db7b9e9df1 https://doi.org/10.1029/2020JD033748 https://pureadmin.uhi.ac.uk/ws/files/15357617/2020JD033748.pdf |
long_lat |
ENVELOPE(-65.433,-65.433,-66.883,-66.883) ENVELOPE(-65.433,-65.433,-66.883,-66.883) ENVELOPE(-63.969,-63.969,-66.845,-66.845) ENVELOPE(-62.792,-62.792,-65.762,-65.762) |
geographic |
Antarctic Antarctic Peninsula Avery Avery Plateau Cole peninsula Flask Glacier The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Avery Avery Plateau Cole peninsula Flask Glacier The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Flask Glacier Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Flask Glacier Ice Shelf Ice Shelves |
op_source |
Kirchgaessner , A , King , J & Anderson , P 2021 , ' The impact of Föhn conditions across the Antarctic Peninsula on local meteorology based on AWS measurements ' , JGR Atmospheres , vol. 126 , no. 4 . https://doi.org/10.1029/2020JD033748 |
op_relation |
https://pure.uhi.ac.uk/en/publications/1ea2c0da-62c5-475f-9a1f-13db7b9e9df1 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020JD033748 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
126 |
container_issue |
4 |
_version_ |
1802643379705610240 |