Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0098.1 |
Impact of the Atlantic Meridional Mode on Gulf Stream North Wall Position | |
Hameed, Sultan; Wolfe, Christopher L. P.; Chi, Lequan | |
2018-11-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:21页码:8875-8894 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The path of the Gulf Stream as it leaves the continental shelf near Cape Hatteras is marked by a sharp gradient in ocean temperature known as the North Wall. Previous work in the literature has considered processes related to the North Atlantic Oscillation (NAO) in triggering latitudinal displacements of the North Wall position. This paper presents evidence that the Atlantic meridional mode (AMM) also impacts interannual variations of the North Wall position. The AMM signal from the tropics propagates to the Gulf Stream near the 200-m depth, and there are two time scales for this interaction. Anomalous Ekman suction induced by AMM cools the tropical Atlantic. The cold water in the Caribbean Sea is entrained into the currents feeding the Gulf Stream, and this cooling signal reaches the North Wall within a year. A second mechanism involves cold anomalies in the western tropical Atlantic, which initially propagate westward as baroclinic planetary waves, reaching the Gulf Stream and resulting in a southward shift in the North Wall position after a delay of about one year. In an analysis for the period 1961-2015, AMM's signal dominates North Wall fluctuations in the upper 300 m, while NAO is the major influence below similar to 500 m; the influence of both the teleconnections is seen between 300 and 500 m. The relationship between the Atlantic meridional overturning circulation (AMOC) and the North Wall is investigated for the 2005-15 period and found to be statistically significant only at the sea surface in one of the three North Wall indices used. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450855400004 |
WOS关键词 | BOUNDARY CURRENT SYSTEM ; OVERTURNING CIRCULATION ; ICELANDIC LOW ; OCEAN MODEL ; PART I ; VARIABILITY ; OSCILLATION ; TRANSPORT ; ZOOPLANKTON ; CLIMATE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19350 |
专题 | 气候变化 |
作者单位 | SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA |
推荐引用方式 GB/T 7714 | Hameed, Sultan,Wolfe, Christopher L. P.,Chi, Lequan. Impact of the Atlantic Meridional Mode on Gulf Stream North Wall Position[J]. JOURNAL OF CLIMATE,2018,31(21):8875-8894. |
APA | Hameed, Sultan,Wolfe, Christopher L. P.,&Chi, Lequan.(2018).Impact of the Atlantic Meridional Mode on Gulf Stream North Wall Position.JOURNAL OF CLIMATE,31(21),8875-8894. |
MLA | Hameed, Sultan,et al."Impact of the Atlantic Meridional Mode on Gulf Stream North Wall Position".JOURNAL OF CLIMATE 31.21(2018):8875-8894. |
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