Atmospheric response to zonally averaged sea surface temperatures in the North Atlantic - a model study
A less dynamically active ocean will most likely lead to a more zonal sea surface temperature (SST) distribution. In order to identify if, and how such an effect affects the atmospheric variability, idealized experiments with an Atmospheric General Circulation Model (AGCM) of intermediate complexity...
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The University of Bergen
2008
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Online Access: | https://hdl.handle.net/1956/21215 |
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ftunivbergen:oai:bora.uib.no:1956/21215 2023-05-15T17:28:32+02:00 Atmospheric response to zonally averaged sea surface temperatures in the North Atlantic - a model study Fagerli, Stig-Arild 2008-05-29 6868750 bytes application/pdf https://hdl.handle.net/1956/21215 eng eng The University of Bergen https://hdl.handle.net/1956/21215 Copyright the Author. All rights reserved Climate dynamics Air-sea interaction Meteorology ocean circulation atmospheric general circulation large scale air-sea interactions NAO EAP 759906 Master thesis 2008 ftunivbergen 2023-03-14T17:42:37Z A less dynamically active ocean will most likely lead to a more zonal sea surface temperature (SST) distribution. In order to identify if, and how such an effect affects the atmospheric variability, idealized experiments with an Atmospheric General Circulation Model (AGCM) of intermediate complexity have been conducted. For two different seasons, the atmospheric response to a removal of the longitudinal dependence of the SSTs in the North Atlantic are investigated. The results reveal a response projecting largely on the model's positive 1st mode of intrinsic atmospheric variability characterized by the North Atlantic Oscillation (NAO). In winter, the response is more in accordance with the variability pattern referred to as the East-Atlantic Pattern (EAP). Generally it is found that the tropical part of the ocean circulation is the most important for creating changes in atmospheric circulation, both at lower and higher latitudes. In general, the local interannual atmospheric variability is decreased in most regions, but several areas also experience increased variability. We identify a tendency of the response amplitudes to increase with longer timescales. Master i Geofysikk - Meteorologi MAMN-GFMET GEOFMET Master Thesis North Atlantic North Atlantic oscillation University of Bergen: Bergen Open Research Archive (BORA-UiB) |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Climate dynamics Air-sea interaction Meteorology ocean circulation atmospheric general circulation large scale air-sea interactions NAO EAP 759906 |
spellingShingle |
Climate dynamics Air-sea interaction Meteorology ocean circulation atmospheric general circulation large scale air-sea interactions NAO EAP 759906 Fagerli, Stig-Arild Atmospheric response to zonally averaged sea surface temperatures in the North Atlantic - a model study |
topic_facet |
Climate dynamics Air-sea interaction Meteorology ocean circulation atmospheric general circulation large scale air-sea interactions NAO EAP 759906 |
description |
A less dynamically active ocean will most likely lead to a more zonal sea surface temperature (SST) distribution. In order to identify if, and how such an effect affects the atmospheric variability, idealized experiments with an Atmospheric General Circulation Model (AGCM) of intermediate complexity have been conducted. For two different seasons, the atmospheric response to a removal of the longitudinal dependence of the SSTs in the North Atlantic are investigated. The results reveal a response projecting largely on the model's positive 1st mode of intrinsic atmospheric variability characterized by the North Atlantic Oscillation (NAO). In winter, the response is more in accordance with the variability pattern referred to as the East-Atlantic Pattern (EAP). Generally it is found that the tropical part of the ocean circulation is the most important for creating changes in atmospheric circulation, both at lower and higher latitudes. In general, the local interannual atmospheric variability is decreased in most regions, but several areas also experience increased variability. We identify a tendency of the response amplitudes to increase with longer timescales. Master i Geofysikk - Meteorologi MAMN-GFMET GEOFMET |
format |
Master Thesis |
author |
Fagerli, Stig-Arild |
author_facet |
Fagerli, Stig-Arild |
author_sort |
Fagerli, Stig-Arild |
title |
Atmospheric response to zonally averaged sea surface temperatures in the North Atlantic - a model study |
title_short |
Atmospheric response to zonally averaged sea surface temperatures in the North Atlantic - a model study |
title_full |
Atmospheric response to zonally averaged sea surface temperatures in the North Atlantic - a model study |
title_fullStr |
Atmospheric response to zonally averaged sea surface temperatures in the North Atlantic - a model study |
title_full_unstemmed |
Atmospheric response to zonally averaged sea surface temperatures in the North Atlantic - a model study |
title_sort |
atmospheric response to zonally averaged sea surface temperatures in the north atlantic - a model study |
publisher |
The University of Bergen |
publishDate |
2008 |
url |
https://hdl.handle.net/1956/21215 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://hdl.handle.net/1956/21215 |
op_rights |
Copyright the Author. All rights reserved |
_version_ |
1766121262710521856 |