Effects of Temperature and Salinity on Surface Currents in the Equatorial Pacific

doi:10.1029/2021JC018175

IOCAS-IR > 海洋环流与波动重点实验室

	Effects of Temperature and Salinity on Surface Currents in the Equatorial Pacific
	Chen, Lu 1,2; Zhang, Rong-Hua1,2,3,4,5 ; Gao, Chuan1,3,4
	2022-04-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	127 期号:4 页码:22
通讯作者	Zhang, Rong-Hua([email protected])
摘要	Surface currents in the equatorial Pacific play a key role in determining thermohaline structures in the upper ocean, thus acting to modulate the tropical Pacific mean state and interannual variability. In turn, the thermohaline structure and its variability can also affect surface currents by changing ocean density and pressure gradients. Currently, the thermohaline effects on the surface currents have not been well understood, especially for the salinity role. In this study, the thermohaline effects on surface currents in the equatorial Pacific are systematically evaluated based on an analytical scheme, which is used to calculate surface currents in producing the Ocean Surface Current Analysis Real-time (OSCAR) product. Several calculations are performed with the original OSCAR-based scheme and an improved scheme including the salinity effect. It is demonstrated that the thermohaline effects are generally dominated by the temperature role, but the salinity effect plays a non-negligible role near the dateline and in the far eastern Pacific. The thermohaline effects are quantified and highlighted on seasonal and interannual time scales. For annual mean surface currents, temperature and salinity effects work together to weaken zonal currents north of the equator, with their reduced amplitude by about half. Seasonally, the thermohaline effects are dominant in spring due to the weakened wind effect. Interannually, the salinity effect explains up to 25% of the total variance in the far eastern equatorial Pacific. This study highlights the substantial contributions of thermohaline anomalies to surface current variabilities, in which salinity can play an important contributing role.
关键词	the equatorial Pacific surface currents OSCAR product temperature and salinity effects
DOI	10.1029/2021JC018175
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[42030410]; National Natural Science Foundation of China (NSFC)[41690122(41690120)]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19060102]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB 40000000]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB 42000000]; NSFC[42176032]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000786284400001
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：4[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/337002/178787
专题	海洋环流与波动重点实验室
通讯作者	Zhang, Rong-Hua
作者单位	1.Chinese Acad Sci, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Ctr Ocean Megasci, Qingdao, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 5.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China
通讯作者单位	中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Chen, Lu,Zhang, Rong-Hua,Gao, Chuan. Effects of Temperature and Salinity on Surface Currents in the Equatorial Pacific[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2022,127(4):22.
APA	Chen, Lu,Zhang, Rong-Hua,&Gao, Chuan.(2022).Effects of Temperature and Salinity on Surface Currents in the Equatorial Pacific.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,127(4),22.
MLA	Chen, Lu,et al."Effects of Temperature and Salinity on Surface Currents in the Equatorial Pacific".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 127.4(2022):22.

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JGR Oceans - 2022 - （3933KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	浏览