Foehn winds link climate-driven warming to ice shelf evolution in Antarctica
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Atmospheres 120 (2015): 11,037–11,057, doi:10.1002/2015JD0234...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7763 2023-05-15T13:48:30+02:00 Foehn winds link climate-driven warming to ice shelf evolution in Antarctica Cape, Mattias R. Vernet, Maria Skvarca, Pedro Marinsek, Sebastian Scambos, Ted Domack, Eugene 2015-11-03 https://hdl.handle.net/1912/7763 en_US eng John Wiley & Sons https://doi.org/10.1002/2015JD023465 Journal of Geophysical Research: Atmospheres 120 (2015): 11,037–11,057 https://hdl.handle.net/1912/7763 doi:10.1002/2015JD023465 Journal of Geophysical Research: Atmospheres 120 (2015): 11,037–11,057 doi:10.1002/2015JD023465 Foehn Föhn Larsen Ice Shelf Antarctica Climate Southern Annular Mode Article 2015 ftwhoas https://doi.org/10.1002/2015JD023465 2022-05-28T22:59:30Z Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Atmospheres 120 (2015): 11,037–11,057, doi:10.1002/2015JD023465. Rapid warming of the Antarctic Peninsula over the past several decades has led to extensive surface melting on its eastern side, and the disintegration of the Prince Gustav, Larsen A, and Larsen B ice shelves. The warming trend has been attributed to strengthening of circumpolar westerlies resulting from a positive trend in the Southern Annular Mode (SAM), which is thought to promote more frequent warm, dry, downsloping foehn winds along the lee, or eastern side, of the peninsula. We examined variability in foehn frequency and its relationship to temperature and patterns of synoptic-scale circulation using a multidecadal meteorological record from the Argentine station Matienzo, located between the Larsen A and B embayments. This record was further augmented with a network of six weather stations installed under the U.S. NSF LARsen Ice Shelf System, Antarctica, project. Significant warming was observed in all seasons at Matienzo, with the largest seasonal increase occurring in austral winter (+3.71°C between 1962–1972 and 1999–2010). Frequency and duration of foehn events were found to strongly influence regional temperature variability over hourly to seasonal time scales. Surface temperature and foehn winds were also sensitive to climate variability, with both variables exhibiting strong, positive correlations with the SAM index. Concomitant positive trends in foehn frequency, temperature, and SAM are present during austral summer, with sustained foehn events consistently associated with surface melting across the ice sheet and ice shelves. These observations support the notion that increased foehn frequency played a critical role in precipitating the collapse of the Larsen B ice shelf. National Science ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelf Ice Shelves Larsen Ice Shelf Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic The Antarctic Antarctic Peninsula Austral Argentine Larsen Ice Shelf ENVELOPE(-62.500,-62.500,-67.500,-67.500) Journal of Geophysical Research: Atmospheres 120 21 11,037 11,057 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Foehn Föhn Larsen Ice Shelf Antarctica Climate Southern Annular Mode |
spellingShingle |
Foehn Föhn Larsen Ice Shelf Antarctica Climate Southern Annular Mode Cape, Mattias R. Vernet, Maria Skvarca, Pedro Marinsek, Sebastian Scambos, Ted Domack, Eugene Foehn winds link climate-driven warming to ice shelf evolution in Antarctica |
topic_facet |
Foehn Föhn Larsen Ice Shelf Antarctica Climate Southern Annular Mode |
description |
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Atmospheres 120 (2015): 11,037–11,057, doi:10.1002/2015JD023465. Rapid warming of the Antarctic Peninsula over the past several decades has led to extensive surface melting on its eastern side, and the disintegration of the Prince Gustav, Larsen A, and Larsen B ice shelves. The warming trend has been attributed to strengthening of circumpolar westerlies resulting from a positive trend in the Southern Annular Mode (SAM), which is thought to promote more frequent warm, dry, downsloping foehn winds along the lee, or eastern side, of the peninsula. We examined variability in foehn frequency and its relationship to temperature and patterns of synoptic-scale circulation using a multidecadal meteorological record from the Argentine station Matienzo, located between the Larsen A and B embayments. This record was further augmented with a network of six weather stations installed under the U.S. NSF LARsen Ice Shelf System, Antarctica, project. Significant warming was observed in all seasons at Matienzo, with the largest seasonal increase occurring in austral winter (+3.71°C between 1962–1972 and 1999–2010). Frequency and duration of foehn events were found to strongly influence regional temperature variability over hourly to seasonal time scales. Surface temperature and foehn winds were also sensitive to climate variability, with both variables exhibiting strong, positive correlations with the SAM index. Concomitant positive trends in foehn frequency, temperature, and SAM are present during austral summer, with sustained foehn events consistently associated with surface melting across the ice sheet and ice shelves. These observations support the notion that increased foehn frequency played a critical role in precipitating the collapse of the Larsen B ice shelf. National Science ... |
format |
Article in Journal/Newspaper |
author |
Cape, Mattias R. Vernet, Maria Skvarca, Pedro Marinsek, Sebastian Scambos, Ted Domack, Eugene |
author_facet |
Cape, Mattias R. Vernet, Maria Skvarca, Pedro Marinsek, Sebastian Scambos, Ted Domack, Eugene |
author_sort |
Cape, Mattias R. |
title |
Foehn winds link climate-driven warming to ice shelf evolution in Antarctica |
title_short |
Foehn winds link climate-driven warming to ice shelf evolution in Antarctica |
title_full |
Foehn winds link climate-driven warming to ice shelf evolution in Antarctica |
title_fullStr |
Foehn winds link climate-driven warming to ice shelf evolution in Antarctica |
title_full_unstemmed |
Foehn winds link climate-driven warming to ice shelf evolution in Antarctica |
title_sort |
foehn winds link climate-driven warming to ice shelf evolution in antarctica |
publisher |
John Wiley & Sons |
publishDate |
2015 |
url |
https://hdl.handle.net/1912/7763 |
long_lat |
ENVELOPE(-62.500,-62.500,-67.500,-67.500) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Austral Argentine Larsen Ice Shelf |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Austral Argentine Larsen Ice Shelf |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelf Ice Shelves Larsen Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelf Ice Shelves Larsen Ice Shelf |
op_source |
Journal of Geophysical Research: Atmospheres 120 (2015): 11,037–11,057 doi:10.1002/2015JD023465 |
op_relation |
https://doi.org/10.1002/2015JD023465 Journal of Geophysical Research: Atmospheres 120 (2015): 11,037–11,057 https://hdl.handle.net/1912/7763 doi:10.1002/2015JD023465 |
op_doi |
https://doi.org/10.1002/2015JD023465 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
21 |
container_start_page |
11,037 |
op_container_end_page |
11,057 |
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1766249336068374528 |