Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica
International audience 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...
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ftccsdartic:oai:HAL:hal-00296907v1 2023-11-12T04:00:52+01:00 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. Institute of Geological and Nuclear Sciences (IGNS) Antarctic Research Centre Victoria University Melbourne Climate Change Institute Orono (CCI) University of Maine 2006-01-09 https://hal.science/hal-00296907 https://hal.science/hal-00296907/document https://hal.science/hal-00296907/file/adgeo-6-83-2006.pdf en eng HAL CCSD European Geosciences Union hal-00296907 https://hal.science/hal-00296907 https://hal.science/hal-00296907/document https://hal.science/hal-00296907/file/adgeo-6-83-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7340 EISSN: 1680-7359 Advances in Geosciences https://hal.science/hal-00296907 Advances in Geosciences, 2006, 6, pp.83-86 [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2006 ftccsdartic 2023-10-21T23:16:22Z International audience 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. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ross Sea Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Ross Sea Amundsen Sea |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences 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 |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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. |
author2 |
Institute of Geological and Nuclear Sciences (IGNS) Antarctic Research Centre Victoria University Melbourne Climate Change Institute Orono (CCI) University of Maine |
format |
Article in Journal/Newspaper |
author |
Bertler, N. A. N. Naish, T. R. Mayewski, P. A. Barrett, P. J. |
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 |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00296907 https://hal.science/hal-00296907/document https://hal.science/hal-00296907/file/adgeo-6-83-2006.pdf |
geographic |
Antarctic Ross Sea Amundsen Sea |
geographic_facet |
Antarctic Ross Sea Amundsen Sea |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ross Sea |
op_source |
ISSN: 1680-7340 EISSN: 1680-7359 Advances in Geosciences https://hal.science/hal-00296907 Advances in Geosciences, 2006, 6, pp.83-86 |
op_relation |
hal-00296907 https://hal.science/hal-00296907 https://hal.science/hal-00296907/document https://hal.science/hal-00296907/file/adgeo-6-83-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782328920324964352 |