Subthermocline eddies carrying the Indonesian Throughflow water observed in the southeastern tropical Indian Ocean

作     者：Guangbing Yang Quanan Zheng Xuejun Xiong Guangbing Yang;Quanan Zheng;Xuejun Xiong

作者机构：First Institute of Oceanographyand Key Laboratory of Marine Science and Numerical ModelingMinistry of Natural ResourcesQingdao 266061China Laboratory for Regional Oceanography and Numerical ModelingPilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Shandong Key Laboratory of Marine Science and Numerical ModelingQingdao 266061China Department of Atmospheric and Oceanic ScienceUniversity of MarylandCollege Park 20742USA 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2023年第42卷第5期

页      面：1-13页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 

基　　金：The Shandong Provincial Natural Science Foundation under contract No.ZR2022MD080 the Basic Scientific Fund for National Public Research Institutes of China under contract No.2017Q01 the National Natural Science Foundation of China(NSFC)under contract Nos 41706038,41576027,41376038,and 40406009 the NSFC-Shandong Joint Fund for Marine Science Research Centers under contract Nos U1406405 and U1606405 the International Cooperation Project of Indo-Pacific Ocean Environment Variation and Air-Sea Interaction under contract No.GASI-03-IPOVAI-05 the National Programme on Global Change and Air-Sea Interaction under contract Nos GASI-03-01-01-02 and GASI-IPOVAI-01-05 the Public Science and Technology Research Funds Projects of Ocean under contract No.2009050240 the National Key Scientific Instrument and Equipment Development Projects under contract No.2012YQ12003908 the National Science and Technology Major Project under contract No.2016ZX05057015 

主　　题：subthermocline eddy southeastern tropical Indian Ocean Indonesian Throughflow submesoscale coherent vortex 

摘      要：We observed a subthermocline eddy(STE)with a cold and fresh core during an observation cruise along a transect of 10°S in the southeastern tropical Indian Ocean(SETIO)in December *** vertical scale,speed radius,and maximum swirl velocity of the STE were about 200 m,55 km,and 0.5 m/s,*** mean Rossby number and Burger number of the STE were then estimated to be about−0.7 and 2.4,indicating the STE was a submesoscale coherent *** STE core water had characteristics of the Indonesian Throughflow(ITF)water and was distinct from that of surrounding *** examining Argo float data,another STE was well captured by five successive profiles of the same Argo *** STEs showed significant temperature and salinity anomalies at theσ0=26.0-26.5 kg/m3 *** the assumption that the low-salinity ITF water parcels could be carried only by surface eddies and the STEs,the Argo profiles,which detected low-salinity ITF water and were located outside a surface eddy,were believed to be inside an STE and were used to analyze the distribution,origin,and generation mechanism of the *** results suggested that the STEs carrying ITF water may be generated under topography-current interaction at the eastern coastal waters or under front-induced subduction in the area away from coastal *** STEs may be widely distributed in the SETIO and may play a role in ITF water parcel transport.