Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica
Here we discuss the cause and effect of opposing atmospheric and oceanic ENSO forcings in the Ross Sea, that lead to a net warming in the eastern Ross Sea and a net cooling in the western Ross Sea during El Niño years. During La Niña years the opposite is observed. The oceanic ENSO effect causes a ~...
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Online Access: | https://doi.org/10.5194/adgeo-6-83-2006 https://adgeo.copernicus.org/articles/6/83/2006/ |
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ftcopernicus:oai:publications.copernicus.org:adgeo37918 2023-05-15T13:24:00+02:00 Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica Bertler, N. A. N. Naish, T. R. Mayewski, P. A. Barrett, P. J. 2018-01-15 application/pdf https://doi.org/10.5194/adgeo-6-83-2006 https://adgeo.copernicus.org/articles/6/83/2006/ eng eng doi:10.5194/adgeo-6-83-2006 https://adgeo.copernicus.org/articles/6/83/2006/ eISSN: 1680-7359 Text 2018 ftcopernicus https://doi.org/10.5194/adgeo-6-83-2006 2020-07-20T16:27:20Z Here we discuss the cause and effect of opposing atmospheric and oceanic ENSO forcings in the Ross Sea, that lead to a net warming in the eastern Ross Sea and a net cooling in the western Ross Sea during El Niño years. During La Niña years the opposite is observed. The oceanic ENSO effect causes a ~1 K warming with a 3 month lag during El Niño years in comparison to La Niña time periods. During El Niño events, the atmospheric ENSO effect leads to a shift and weakening of the Amundsen Sea Low, causing enhanced import of colder West Antarctic air masses into the western Ross Sea. We find that this indirect ENSO effect is about one order of magnitude stronger (up to 15 K) in the western Ross Sea than the direct effect (~1 K), leading to a net cooling during El Niño and net warming during La Niña events. Text Amundsen Sea Antarc* Antarctic Antarctica Ross Sea Copernicus Publications: E-Journals Amundsen Sea Antarctic Ross Sea Advances in Geosciences 6 83 86 |
institution |
Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Here we discuss the cause and effect of opposing atmospheric and oceanic ENSO forcings in the Ross Sea, that lead to a net warming in the eastern Ross Sea and a net cooling in the western Ross Sea during El Niño years. During La Niña years the opposite is observed. The oceanic ENSO effect causes a ~1 K warming with a 3 month lag during El Niño years in comparison to La Niña time periods. During El Niño events, the atmospheric ENSO effect leads to a shift and weakening of the Amundsen Sea Low, causing enhanced import of colder West Antarctic air masses into the western Ross Sea. We find that this indirect ENSO effect is about one order of magnitude stronger (up to 15 K) in the western Ross Sea than the direct effect (~1 K), leading to a net cooling during El Niño and net warming during La Niña events. |
format |
Text |
author |
Bertler, N. A. N. Naish, T. R. Mayewski, P. A. Barrett, P. J. |
spellingShingle |
Bertler, N. A. N. Naish, T. R. Mayewski, P. A. Barrett, P. J. Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica |
author_facet |
Bertler, N. A. N. Naish, T. R. Mayewski, P. A. Barrett, P. J. |
author_sort |
Bertler, N. A. N. |
title |
Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica |
title_short |
Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica |
title_full |
Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica |
title_fullStr |
Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica |
title_full_unstemmed |
Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica |
title_sort |
opposing oceanic and atmospheric enso influences on the ross sea region, antarctica |
publishDate |
2018 |
url |
https://doi.org/10.5194/adgeo-6-83-2006 https://adgeo.copernicus.org/articles/6/83/2006/ |
geographic |
Amundsen Sea Antarctic Ross Sea |
geographic_facet |
Amundsen Sea Antarctic Ross Sea |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ross Sea |
op_source |
eISSN: 1680-7359 |
op_relation |
doi:10.5194/adgeo-6-83-2006 https://adgeo.copernicus.org/articles/6/83/2006/ |
op_doi |
https://doi.org/10.5194/adgeo-6-83-2006 |
container_title |
Advances in Geosciences |
container_volume |
6 |
container_start_page |
83 |
op_container_end_page |
86 |
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1766376857972768768 |