Salinity interdecadal variability in the western equatorial Pacific and its effects during 1950-2018

doi:10.1007/s00382-022-06417-8

IOCAS-IR > 海洋环流与波动重点实验室

	Salinity interdecadal variability in the western equatorial Pacific and its effects during 1950-2018
	Zhang, Rong-Hua1,2,3,4,5 ; Zhou, Guanghui 2,3,4; Zhi, Hai 6; Gao, Chuan2,3,4,5 ; Wang, Hongna 2,3,5; Feng, Licheng 7
	2022-08-01
发表期刊	CLIMATE DYNAMICS
ISSN	0930-7575
页码	23
通讯作者	Zhang, Rong-Hua([email protected])
摘要	Ocean reanalysis products are used to examine salinity variability and its relationships with temperature in the western equatorial Pacific during 1950-2018. An ensemble empirical mode decomposition (EEMD) method is adopted to separate salinity and temperature signals at different time scales; a focus is placed on interdecadal component in this study. Pronounced interdecadal variations in salinity are seen in the region, which exhibits persistent and transitional phases in association with temperature. A surface freshening is accompanied by a surface warming during the 1980s and 1990s, but saltening and cooling in the 2000s, with interdecadal shifts occurring around in the late 1970s, late 1990s, and during 2016-2018, respectively. Determined by anomaly signs of temperature and salinity, their combined effects can be density-compensated or density-uncompensated, correspondingly acting to produce density variability that is suppressed or enhanced, respectively. The temperature and salinity effects are phase- and depth-dependent. In the subsurface layers at 200 m, where salinity and temperature anomalies tend to be nearly of the same sign during interdecadal evolution, their effects are mostly density-compensated. The situation is more complicated in the surface layer, where variations in sea surface salinity (SSS) and sea surface temperature (SST) exhibit different signs during interdecadal evolution. SST and SSS tend to be of opposite sign during the persistent phases with their effects being density-uncompensated; but they can be of the same sign during the transitional periods and the corresponding changes in SST and SSS undergo density-compensated relationships. Examples are given for the relationships among these fields which exhibit phase differences in sign transitions in the late 1990s; salinity effects are seen to cause a delay in phase transition of density anomalies. Furthermore, the relative contributions to interdecadal variabilities of density and stratification are quantified. The consequences of interdecadal salinity variability are also discussed in terms of their effects on local SST.
关键词	The western equatorial Pacific Salinity interdecadal variability Compensated and uncompensated effects Relative contributions EEMD method
DOI	10.1007/s00382-022-06417-8
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[42030410]; Startup Foundation for Introducing Talent of NUIST; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[XDA19060102]; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[XDB42000000]; NSFC[42176032]; Strategic Priority Research Program of the CAS[XDB40000000]; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology(Qingdao)[2022QNLM010301-3]; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology(Qingdao)[2022QNLM010301-4]
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000834727500002
出版者	SPRINGER
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/337002/179861
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.Nanjing Univ Informat Sci & Technol, Sch Marine Sci, Nanjing 210044, Peoples R China 2.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 4.Univ Chinese Acad Sci, Beijing 10029, Peoples R China 5.Pilot Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao 266237, Peoples R China 6.Nanjing Univ Informat Sci & Technol, Sch Atmospher Sci, Nanjing 210044, Peoples R China 7.Minist Nat Resources, Natl Marine Environm Forecasting Ctr, Beijing 100081, Peoples R China
第一作者单位	海洋环流与波动重点实验室; 中国科学院海洋大科学研究中心
通讯作者单位	海洋环流与波动重点实验室; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Zhang, Rong-Hua,Zhou, Guanghui,Zhi, Hai,et al. Salinity interdecadal variability in the western equatorial Pacific and its effects during 1950-2018[J]. CLIMATE DYNAMICS,2022:23.
APA	Zhang, Rong-Hua,Zhou, Guanghui,Zhi, Hai,Gao, Chuan,Wang, Hongna,&Feng, Licheng.(2022).Salinity interdecadal variability in the western equatorial Pacific and its effects during 1950-2018.CLIMATE DYNAMICS,23.
MLA	Zhang, Rong-Hua,et al."Salinity interdecadal variability in the western equatorial Pacific and its effects during 1950-2018".CLIMATE DYNAMICS (2022):23.