{"title":"Intensification of Decadal Variability in Sea Surface Salinity in the Western Tropical Pacific","authors":"Yue Wu, Guanghui Zhou, Shijian Hu","doi":"10.1029/2024GL113453","DOIUrl":null,"url":null,"abstract":"<p>The decadal variability of sea surface salinity (SSS) is crucial for the global water cycle and the climate system. Previous studies have indicated that the SSS in the western tropical Pacific (WTP) Ocean exhibits significant decadal variability, which plays an important role in shaping tropical climate. Here we find that the amplitude of SSS decadal variability in the WTP has been intensified significantly since the early 1950s. A comprehensive analysis of the salinity budget indicates that the amplifying of SSS decadal variability in the WTP is primarily attributed to changes in both the freshwater flux and ocean dynamics. During the past decades, surface currents in the WTP get stronger and result in enhanced salinity advection. In addition, the amplitude of decadal variability of freshwater flux is increased as well due to anomalous atmospheric circulation associated with the Victoria mode.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 5","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL113453","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geophysical Research Letters","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1029/2024GL113453","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The decadal variability of sea surface salinity (SSS) is crucial for the global water cycle and the climate system. Previous studies have indicated that the SSS in the western tropical Pacific (WTP) Ocean exhibits significant decadal variability, which plays an important role in shaping tropical climate. Here we find that the amplitude of SSS decadal variability in the WTP has been intensified significantly since the early 1950s. A comprehensive analysis of the salinity budget indicates that the amplifying of SSS decadal variability in the WTP is primarily attributed to changes in both the freshwater flux and ocean dynamics. During the past decades, surface currents in the WTP get stronger and result in enhanced salinity advection. In addition, the amplitude of decadal variability of freshwater flux is increased as well due to anomalous atmospheric circulation associated with the Victoria mode.
期刊介绍：
Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.
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