气候变化领域集成服务门户(CCPortal): The Characteristics of Near-Equatorial North Pacific Low PV Water and Its Possible Influences on the Equatorial Subsurface Ocean

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DOI	10.1029/2020JC016282
	The Characteristics of Near-Equatorial North Pacific Low PV Water and Its Possible Influences on the Equatorial Subsurface Ocean
	Wang Z.; Wen Z.; Hu H.; Song Z.; Liu G.
发表日期	2020
ISSN	21699275
卷号	125 期号:9
英文摘要	Using SODA oceanic reanalysis data, the subduction rate and low potential vorticity (PV) water masses in the North Pacific are investigated from January 1870 to December 2008. A new low PV water mass with a large subduction rate is found near-equatorial North Pacific, which is named as the near-equatorial North Pacific low PV water mass (NELPVW), and it is the only one low PV water mass in North Pacific that appears an increasing trend under global warming. Among all the low PV water masses in North Pacific, only Eastern Subtropical Mode Water (EMW) and NELPVW can migrate to the equatorial Pacific and effect subsurface oceanic temperature (SOT) there. Further research shows that the subducted low PV water mass in EMW generation region can migrate to equatorial Pacific through two transport paths, which are called the Western-EMW path and the Central-EMW path. The analysis of Lagrange tracking shows that EMW can migrate and bring SOT anomaly to equatorial Pacific along these paths in 7 years and lead to the almost precisely opposite distributions of equatorial Pacific SOT anomaly between the strong and weak EMW subduction years, while it takes the newly discovered NELPVW less than 3 years to reach the equatorial Pacific along the Western-NELPVW path or the Eastern-NELPVW path after subduction. The distributions of equatorial Pacific SOT anomaly in the strong and weak NELPVW subduction years are approximately reverse too. The actual distribution of the equatorial Pacific SOT is affected by these two low PV water masses at the same time. ©2020. The Authors.
英文关键词	EMW; equatorial subsurface oceanic temperature; NELPVW; subduction rate; water mass transport
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186707
作者单位	CMA-NJU Joint Laboratory for Climate Prediction Studies, Instituted for Climate and Global Change Research, School of Atmospheric Science, Nanjing University, Nanjing, China; First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China; KLME and CIC-FEMD, Nanjing University of Information Science and Technology, Nanjing, China; Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, NS, Canada
推荐引用方式 GB/T 7714	Wang Z.,Wen Z.,Hu H.,et al. The Characteristics of Near-Equatorial North Pacific Low PV Water and Its Possible Influences on the Equatorial Subsurface Ocean[J],2020,125(9).
APA	Wang Z.,Wen Z.,Hu H.,Song Z.,&Liu G..(2020).The Characteristics of Near-Equatorial North Pacific Low PV Water and Its Possible Influences on the Equatorial Subsurface Ocean.Journal of Geophysical Research: Oceans,125(9).
MLA	Wang Z.,et al."The Characteristics of Near-Equatorial North Pacific Low PV Water and Its Possible Influences on the Equatorial Subsurface Ocean".Journal of Geophysical Research: Oceans 125.9(2020).