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dc.contributor.authorCape, Mattias R.  Concept link
dc.contributor.authorVernet, Maria  Concept link
dc.contributor.authorSkvarca, Pedro  Concept link
dc.contributor.authorMarinsek, Sebastian  Concept link
dc.contributor.authorScambos, Ted  Concept link
dc.contributor.authorDomack, Eugene  Concept link
dc.date.accessioned2016-02-04T20:49:52Z
dc.date.available2016-05-03T07:27:01Z
dc.date.issued2015-11-03
dc.identifier.citationJournal of Geophysical Research: Atmospheres 120 (2015): 11,037–11,057en_US
dc.identifier.urihttps://hdl.handle.net/1912/7763
dc.descriptionAuthor 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.en_US
dc.description.abstractRapid 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.en_US
dc.description.sponsorshipNational Science Foundation Office of Polar Programs Grant Numbers: ANT-0732983, ANT-0732467, ANT-0732921; NSF Graduate Research Fellowship Grant Number: DGE-1144086; NASA Earth and Space Science Fellowship Program Grant Number: NNX12AN48Hen_US
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/2015JD023465
dc.subjectFoehnen_US
dc.subjectFöhnen_US
dc.subjectLarsen Ice Shelfen_US
dc.subjectAntarcticaen_US
dc.subjectClimateen_US
dc.subjectSouthern Annular Modeen_US
dc.titleFoehn winds link climate-driven warming to ice shelf evolution in Antarcticaen_US
dc.typeArticleen_US
dc.description.embargo2016-05-03en_US
dc.identifier.doi10.1002/2015JD023465


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