Effects of interannual salinity variability on the dynamic height in the western equatorial Pacific as diagnosed by Argo  

作　　者：ZHENG Fei WANG Hui WAN Liying 

机构地区：[1]International Center for Climate and Environment Science (ICCES),Institute of Atmospheric Physics,Chinese Academy of Sciences [2]National Meteorological Center [3]Key Laboratory of Research on Marine Hazards Forecasting,National Marine Environmental Forecasting Center

出　　处：《Acta Oceanologica Sinica》2015年第5期22-28,共7页海洋学报（英文版）

基　　金：The National Program for Support of Top-notch Young Professionals;the National Basic Research Program(973 Program)of China under contract No.2012CB417404;the Chinese Academy Sciences'Project"Western Pacific Ocean System:Structure,Dynamics and Consequences"(WPOS)under contract No.XDA10010405;the National Natural Science Foundation of China under contract No.41176014

摘　　要：In this paper, interannual variations of the ocean dynamic height over the tropical Pacific are diagnosed using three-dimensional temperature and salinity fields from Argo profiles, with a focus on the effects of interannually varying salinity on the El Nino-Southern Oscillation （ENSO） evolutions. The diagnostic analyses clearly demonstrate a significant and large role that the salinity field plays in modulating the sea surface dynamic height （SSDH） in the western tropical Pacific. In particular, the contribution of the interannually varying salinity to the interannual variations in SSDH approximately equals to that of the interannually varying temperature. Over the western equatorial Pacific, the salinity variability was responsible for a 30% to 40% reduction in SSDH anomaly in opposition to the thermal build up in SSDH anomaly, providing an important contribution to modulating the seasonal-to-interannual evolution of the tropical Pacific Ocean and affecting the developing of ENSO events.In this paper, interannual variations of the ocean dynamic height over the tropical Pacific are diagnosed using three-dimensional temperature and salinity fields from Argo profiles, with a focus on the effects of interannually varying salinity on the El Nino-Southern Oscillation （ENSO） evolutions. The diagnostic analyses clearly demonstrate a significant and large role that the salinity field plays in modulating the sea surface dynamic height （SSDH） in the western tropical Pacific. In particular, the contribution of the interannually varying salinity to the interannual variations in SSDH approximately equals to that of the interannually varying temperature. Over the western equatorial Pacific, the salinity variability was responsible for a 30% to 40% reduction in SSDH anomaly in opposition to the thermal build up in SSDH anomaly, providing an important contribution to modulating the seasonal-to-interannual evolution of the tropical Pacific Ocean and affecting the developing of ENSO events.

关 键 词：salinity effect SSDH ENSO ARGO western tropical Pacific 

分 类 号：P731.12[天文地球—海洋科学]