Interannual variability of the spring Wyrtki Jet

作者：Kangping DENG,Xuhua CHENG,Tao FENG,Tian MA,Wei DUAN,Jiajia CHEN

摘要：Features of the interannual variability of the spring Wyrtki Jet in the tropical Indian Ocean are revealed using observation data and model output.The results show that the jet has signifi cant interannual variation,which has a signifi cant correlation with winter El Niño Modoki index(R=0.62).During spring after an El Niño(La Niña)Modoki event,the Wyrtki Jet has a positive(negative)anomaly,forced by a westerly(easterly)wind anomaly.The result of a linear-continuously stratifi ed model shows that the fi rst two baroclinic modes explain most of the interannual variability of the spring Wyrtki Jet(~70%)and the third to fi fth modes together account for approximately 30%.Surface wind anomalies in the tropical Indian Ocean are related to the Walker circulation anomaly associated with El Niño/La Niña Modoki.The interannual variability of the spring Wyrtki Jet has an evident impact on sea surface salinity transport before the onset phase of the summer monsoon in the Indian Ocean.

发文机构：Hohai University Southern Marine Science and Engineering Guangdong Laboratory（Zhuhai） Key Laboratory of Coastal Disaster and Defense（Hohai University）

关键词：EquatorialIndianOceanWyrtkiJetinterannualvariabilityElNiño/LaNiñaModoki

分类号： P73[天文地球—海洋科学]