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Effects of Salinity Variability on Recent El Nino Events
Zhi, Hai1; Zhang, Rong-Hua2,3; Lin, Pengfei4,5; Shi, Shiwei1
Source PublicationATMOSPHERE
Corresponding AuthorLin, Pengfei(
AbstractOcean salinity variability provides a new way to study the evolution of the the El Nino-Southern Oscillation (ENSO). Comparisons between the salinity variation and related processes responsible for sea surface temperature anomaly (SSTA) were extensively examined for the two strong El Nino (EN) events in 1997/1998 and 2015/2016, and a special EN event in 2014/2015. The results show that the development of EN is significantly correlated with a sea surface salinity anomaly (SSSA) in the tropical western-central Pacific. In the spring of 1997 and 2015 with strong EN events, the western-central equatorial Pacific exhibited significant negative SSSA that propagated eastward to the west of the dateline. The negative SSSA induced increased barrier layer thickness (BLT) which enhanced sea surface temperature (SST) warming in the tropical central Pacific. In contrast, although a negative SSSA occurred during April of the 2014/2015 weak EN event in the western-central equatorial Pacific, this SSSA was mainly confined to between 160 degrees E and 180 degrees E without significant eastward movement, resulting in a weakened BLT thickening process and a weak modulation effect on SST. We also confirm that the surface forcing associated with fresh water flux (FWF: evaporation (E) minus precipitation (P)) plays a prominent role in the surface salinity tendency in the tropical Pacific during EN events. Moreover, the negative FWF anomaly leads a strong negative SSSA by two months. Compared with the two strong ENs, the early negative FWF anomaly in the weak 2014/2015 EN did not present distinct development and eastward propagation and weakened rapidly in the summer of 2015. We demonstrate that change in salinity can modulate the ENSO, and the variation of SSSA and associated physical processes in the tropical western-central Pacific and could be used as an indicator for predicting the development of ENSO.
Keywordsea surface salinity anomaly interannual variability strong and weak El Nino equatorial Pacific
Indexed BySCI
Funding ProjectNational Key Research and Development Program on Monitoring, Early Warning and Prevention of Major Natural Disaster[2018YFC1506002] ; National Key Research and Development Program of China[2016YFC1401601] ; National Natural Science Foundation of China[41576026] ; National Natural Science Foundation of China[41690122] ; National Natural Science Foundation of China[41690120] ; National Natural Science Foundation of China[41475101] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1406401] ; NSFC Innovative Group Grant[41421005] ; Taishan Scholarship
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000482983500018
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLin, Pengfei
Affiliation1.Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing 10044, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Shandong, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao 266237, Shandong, Peoples R China
4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhi, Hai,Zhang, Rong-Hua,Lin, Pengfei,et al. Effects of Salinity Variability on Recent El Nino Events[J]. ATMOSPHERE,2019,10(8):20.
APA Zhi, Hai,Zhang, Rong-Hua,Lin, Pengfei,&Shi, Shiwei.(2019).Effects of Salinity Variability on Recent El Nino Events.ATMOSPHERE,10(8),20.
MLA Zhi, Hai,et al."Effects of Salinity Variability on Recent El Nino Events".ATMOSPHERE 10.8(2019):20.
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