气候变化领域集成服务门户(CCPortal): Observed Triple Mode of Salinity Variability in the Thermocline of Tropical Pacific Ocean

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DOI	10.1029/2020JC016210
	Observed Triple Mode of Salinity Variability in the Thermocline of Tropical Pacific Ocean
	Hu S.; Sprintall J.; Guan C.; Hu D.; Wang F.; Lu X.; Li S.
发表日期	2020
ISSN	21699275
卷号	125 期号:9
英文摘要	A well-defined Triple MOde of Salinity (TMOS) variability in the tropical Pacific thermocline layer (24–25.5 σθ isopycnal surfaces) is revealed from the Argo observations during 2004–2018. Thermocline salinity in the tropical northern and southwestern Pacific Ocean varies out of phase on interannual to near-decadal time scales with that in the tropical southeastern Pacific Ocean. The TMOS is attributed to anomalous advection of mean salinity as well as advection of anomalous salinity by the mean oceanic current on isopycnal surfaces. While the TMOS pattern is quite different from the thermal patterns associated with the El Niño-Southern Oscillation (ENSO) or the Pacific Decadal Oscillation (PDO), it is significantly associated with the ENSO and PDO indices with a time lag of 10 months. Isopycnal propagation of salinity anomalies and anomalous freshwater input in the outcropping region, also both associated with ENSO and PDO, are important in the formation of TMOS. The propagation speed of isopycnal salinity anomalies is close to documented phase speeds of baroclinic Rossby waves and velocities of zonal currents. The TMOS acts to shape the basin-scale Pacific water masses and potentially plays an important role in climate. © 2020 The Authors.
英文关键词	ENSO; isopycnal; ocean currents; PDO; salinity; TMOS
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/186694
作者单位	CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China; Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China; College of Marine Science, University of Chinese Academy of Sciences, Qingdao, China; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Institute of Oceanographic Instrumentation, Shandong Academy of Sciences, Qingdao, China
推荐引用方式 GB/T 7714	Hu S.,Sprintall J.,Guan C.,et al. Observed Triple Mode of Salinity Variability in the Thermocline of Tropical Pacific Ocean[J],2020,125(9).
APA	Hu S..,Sprintall J..,Guan C..,Hu D..,Wang F..,...&Li S..(2020).Observed Triple Mode of Salinity Variability in the Thermocline of Tropical Pacific Ocean.Journal of Geophysical Research: Oceans,125(9).
MLA	Hu S.,et al."Observed Triple Mode of Salinity Variability in the Thermocline of Tropical Pacific Ocean".Journal of Geophysical Research: Oceans 125.9(2020).