Strengthening and Lengthening of the Hawaiian Lee Countercurrent Driven by the Pacific Trade Wind Acceleration

doi:10.1029/2020JC016058

IOCAS-IR > 海洋环流与波动重点实验室

	Strengthening and Lengthening of the Hawaiian Lee Countercurrent Driven by the Pacific Trade Wind Acceleration
	Nan, Feng 1,2,3,4; Xue, Huijie 2; Yu, Fei 1,3,4,5; Wang, Ran6
	2020-07-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	125 期号:7 页码:13
通讯作者	Xue, Huijie(hxue@maine.edu)
摘要	The Hawaiian Lee Countercurrent (HLCC) is a zonal eastward flowing current driven by the orographic wind stress curl (WSC) dipole on the leeside of the Hawaiian Islands, which plays an important role in the regional air-sea interactions. During the late 1990s and early 2010s, the Pacific trade winds exhibited an unprecedented acceleration with respect to the past century, thus implying a strengthening of the HLCC. Based on satellite observations, we found that the mean velocity and length of the HLCC increased by 53% and 97%, respectively, during the period of the Pacific trade wind acceleration (1999-2014) in comparison to the mean values during the weakened years (1993-1998 and 2015-2018). Correspondingly, the mean heat transport by the HLCC across the International Date Line during the strengthened years increased by 80% in comparison to that before 1999 and after 2014. The sea level anomaly (SLA) variation to the south of the HLCC was found to be the main factor controlling the changes in the HLCC. Local (i.e., near the Hawaiian Islands) and remote WSC both contributed to the SLA variation by exciting westward propagating oceanic Rossby waves, although the former was dominant. Our results also indicate that the dramatically changing HLCC plays an important role in eddy generation along the HLCC path.
关键词	Hawaiian Lee Countercurrent strengthening Pacific trade wind acceleration sea level anomaly Rossby waves
DOI	10.1029/2020JC016058
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41676005] ; Global Climate Changes and Air-sea Interaction Program[GASI-IPOVAI-01-06] ; CAS Huiquan Scholar ; CAS Youth Innovation Promotion Association ; NSFC Innovative Group Grant[41421005]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000560011100023
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/168160
专题	海洋环流与波动重点实验室
通讯作者	Xue, Huijie
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Wave Studies, Qingdao, Peoples R China 2.Univ Maine, Sch Marine Sci, Orono, ME 04469 USA 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 5.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China 6.Hohai Univ, Coll Oceanog, Nanjing, Peoples R China
第一作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Nan, Feng,Xue, Huijie,Yu, Fei,et al. Strengthening and Lengthening of the Hawaiian Lee Countercurrent Driven by the Pacific Trade Wind Acceleration[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2020,125(7):13.
APA	Nan, Feng,Xue, Huijie,Yu, Fei,&Wang, Ran.(2020).Strengthening and Lengthening of the Hawaiian Lee Countercurrent Driven by the Pacific Trade Wind Acceleration.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,125(7),13.
MLA	Nan, Feng,et al."Strengthening and Lengthening of the Hawaiian Lee Countercurrent Driven by the Pacific Trade Wind Acceleration".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 125.7(2020):13.

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Strengthening and Le（7189KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	浏览