An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic
It is known that there is a distinct intraseasonal variation in wintertime atmospheric responses to El Niño over the North Atlantic, namely a positive North Atlantic Oscillation (NAO)-like response during early winter (November to December) and a negative NAO-like response during late win...
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ftdoajarticles:oai:doaj.org/article:b9bc98c813b24fe48e2439912c1938ab 2023-05-15T17:25:35+02:00 An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic Mi-Kyung Sung Yoo-Geun Ham Jong-Seong Kug Soon-Il An 2013-03-01T00:00:00Z https://doi.org/10.3402/tellusa.v65i0.19863 https://doaj.org/article/b9bc98c813b24fe48e2439912c1938ab EN eng Stockholm University Press http://www.tellusa.net/index.php/tellusa/article/view/19863/pdf_1 https://doaj.org/toc/0280-6495 https://doaj.org/toc/1600-0870 doi:10.3402/tellusa.v65i0.19863 0280-6495 1600-0870 https://doaj.org/article/b9bc98c813b24fe48e2439912c1938ab Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 65, Iss 0, Pp 1-13 (2013) ENSO teleconnection NAO tropical North Atlantic SST Oceanography GC1-1581 Meteorology. Climatology QC851-999 article 2013 ftdoajarticles https://doi.org/10.3402/tellusa.v65i0.19863 2022-12-30T23:53:11Z It is known that there is a distinct intraseasonal variation in wintertime atmospheric responses to El Niño over the North Atlantic, namely a positive North Atlantic Oscillation (NAO)-like response during early winter (November to December) and a negative NAO-like response during late winter (January to March). In this article, we suggest that the tropical North Atlantic (TNAL) sea surface temperatures (SSTs) significantly alter the North Atlantic atmospheric response to El Niño: the warm TNAL SST condition intensifies the negative NAO-like response and vice versa. During late El Niño winters, the TNAL SST tends to increase due to the atmospheric bridge between the tropical Pacific and the Atlantic oceans. The warm tendency in the TNAL SST can intensify the height contrast in the El Niño teleconnection between early and late winter. During early winter (when the response of the TNAL SST to El Niño has not been established yet), atmospheric circulation over the North Atlantic varies widely under various TNAL conditions. Consequently, the average influence of El Niño over the North Atlantic region becomes weaker in the early winter. By contrast, the overall warming over the TNAL region during the late El Niño winter is conducive to the formation of a negative NAO pattern. As a result, the climatic impact becomes stronger during the late winter. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Pacific Tellus A: Dynamic Meteorology and Oceanography 65 1 19863 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ENSO teleconnection NAO tropical North Atlantic SST Oceanography GC1-1581 Meteorology. Climatology QC851-999 |
spellingShingle |
ENSO teleconnection NAO tropical North Atlantic SST Oceanography GC1-1581 Meteorology. Climatology QC851-999 Mi-Kyung Sung Yoo-Geun Ham Jong-Seong Kug Soon-Il An An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic |
topic_facet |
ENSO teleconnection NAO tropical North Atlantic SST Oceanography GC1-1581 Meteorology. Climatology QC851-999 |
description |
It is known that there is a distinct intraseasonal variation in wintertime atmospheric responses to El Niño over the North Atlantic, namely a positive North Atlantic Oscillation (NAO)-like response during early winter (November to December) and a negative NAO-like response during late winter (January to March). In this article, we suggest that the tropical North Atlantic (TNAL) sea surface temperatures (SSTs) significantly alter the North Atlantic atmospheric response to El Niño: the warm TNAL SST condition intensifies the negative NAO-like response and vice versa. During late El Niño winters, the TNAL SST tends to increase due to the atmospheric bridge between the tropical Pacific and the Atlantic oceans. The warm tendency in the TNAL SST can intensify the height contrast in the El Niño teleconnection between early and late winter. During early winter (when the response of the TNAL SST to El Niño has not been established yet), atmospheric circulation over the North Atlantic varies widely under various TNAL conditions. Consequently, the average influence of El Niño over the North Atlantic region becomes weaker in the early winter. By contrast, the overall warming over the TNAL region during the late El Niño winter is conducive to the formation of a negative NAO pattern. As a result, the climatic impact becomes stronger during the late winter. |
format |
Article in Journal/Newspaper |
author |
Mi-Kyung Sung Yoo-Geun Ham Jong-Seong Kug Soon-Il An |
author_facet |
Mi-Kyung Sung Yoo-Geun Ham Jong-Seong Kug Soon-Il An |
author_sort |
Mi-Kyung Sung |
title |
An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic |
title_short |
An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic |
title_full |
An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic |
title_fullStr |
An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic |
title_full_unstemmed |
An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic |
title_sort |
alterative effect by the tropical north atlantic sst in intraseasonally varying el niño teleconnection over the north atlantic |
publisher |
Stockholm University Press |
publishDate |
2013 |
url |
https://doi.org/10.3402/tellusa.v65i0.19863 https://doaj.org/article/b9bc98c813b24fe48e2439912c1938ab |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 65, Iss 0, Pp 1-13 (2013) |
op_relation |
http://www.tellusa.net/index.php/tellusa/article/view/19863/pdf_1 https://doaj.org/toc/0280-6495 https://doaj.org/toc/1600-0870 doi:10.3402/tellusa.v65i0.19863 0280-6495 1600-0870 https://doaj.org/article/b9bc98c813b24fe48e2439912c1938ab |
op_doi |
https://doi.org/10.3402/tellusa.v65i0.19863 |
container_title |
Tellus A: Dynamic Meteorology and Oceanography |
container_volume |
65 |
container_issue |
1 |
container_start_page |
19863 |
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1766117053141352448 |