دورية أكاديمية
An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic
| العنوان: | An alterative effect by the tropical North Atlantic SST in intraseasonally varying El Niño teleconnection over the North Atlantic |
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| المؤلفون: | Mi-Kyung Sung, Yoo-Geun Ham, Jong-Seong Kug, Soon-Il An |
| المصدر: | Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 65, Iss 0, Pp 1-13 (2013) |
| بيانات النشر: | Stockholm University Press, 2013. |
| سنة النشر: | 2013 |
| المجموعة: | LCC:Oceanography LCC:Meteorology. Climatology |
| مصطلحات موضوعية: | ENSO teleconnection, NAO, tropical North Atlantic SST, Oceanography, GC1-1581, Meteorology. Climatology, QC851-999 |
| الوصف: | 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. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0280-6495 1600-0870 |
| 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 |
| URL الوصول: | https://doaj.org/article/b9bc98c813b24fe48e2439912c1938ab |
| رقم الأكسشن: | edsdoj.b9bc98c813b24fe48e2439912c1938ab |
| قاعدة البيانات: | Directory of Open Access Journals |
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Full Text Finder | تدمد: | 02806495 16000870 |
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| DOI: | 10.3402/tellusa.v65i0.19863 |