Propagation of the subsurface freshening water and its major source in the northwestern Pacific

doi:10.1002/2017JC013033

	Propagation of the subsurface freshening water and its major source in the northwestern Pacific
	Yan, Youfang 1; Xu, Dazhi 2; Yu, Kai 3; Qi, Yiquan 1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2017-08
卷号	122 期号:8 页码:6857-6871
ISSN号	2169-9275
DOI	10.1002/2017JC013033
英文摘要	Previous studies of the exchanges of the subtropical-tropical salinity in the North Pacific are still not conclusive. Some studies suggest that surface salinity anomalies formed in the northeastern subtropics can subduct and penetrate to the subsurface of the northwestern Pacific, whereas others demonstrate that subsurface salinity anomalies in the northwestern Pacific cannot be traced back to those of the eastern subtropics. This study examined the variability of subsurface salinity in the northwestern Pacific, with focus on its propagation characteristic and forcing mechanism in its outcrop region. It is found that salinity anomalies on 24.5-25.4 kg m(-3) isopycnals exhibited a pronounced freshening trend in the northwestern Pacific during 2003-2012. This freshening can be traced back to the surface salinity anomalies in the outcrop zone of the northwestern subtropical gyre, rather than that of northeastern subtropics. The representative transit time from its outcrop region to the eastern Luzon Strait is about 1-3 years. The surface salinity anomalies in the outcrop zone are mainly controlled by air-sea freshwater flux change, although the contribution of horizontal advection is also important, in particular for year-to-year variation. Compared to the air-sea freshwater flux and horizontal advection, the contribution of mixed-layer depth to the surface salinity anomalies is smaller and can be neglected in the outcrop zone of the northwestern Pacific.
资助项目	Marine Science and Technology Foundation of South China Sea Branch, State Oceanic Administration[1447]
WOS研究方向	Oceanography
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000410790600046
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3126]
专题	自然资源部第一海洋研究所
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China; 2.State Ocean Adm, South China Sea Marine Predict Ctr, Qingdao, Peoples R China; 3.Nanjing Univ Informat Sci & Technol, Marine Sci Coll, Ocean Modeling & Observat Lab, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Yan, Youfang,Xu, Dazhi,Yu, Kai,et al. Propagation of the subsurface freshening water and its major source in the northwestern Pacific[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2017,122(8):6857-6871.
APA	Yan, Youfang,Xu, Dazhi,Yu, Kai,&Qi, Yiquan.(2017).Propagation of the subsurface freshening water and its major source in the northwestern Pacific.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,122(8),6857-6871.
MLA	Yan, Youfang,et al."Propagation of the subsurface freshening water and its major source in the northwestern Pacific".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 122.8(2017):6857-6871.