Variations in Dissolved Oxygen Induced by a Tropical Storm Within an Anticyclone in the Northern South China Sea  

作　　者：YI Zhenhui WANG Dongxiao QIU Chunhua MAO Huabin YU Jiancheng LIAN Shumin 

机构地区：[1]School of Marine Sciences,Sun Yat-sen University,Guangzhou 510275,China [2]Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519020,China [3]State Key Laboratory of Tropical Oceanography,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China [4]State Key Laboratory of Robotics,Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China [5]Pearl River Estuary Marine Ecosystem Research Station,Ministry of Education,Zhuhai 519020,China [6]Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering,Zhuhai 519020,China

出　　处：《Journal of Ocean University of China》2022年第5期1084-1098,共15页中国海洋大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.41976002);the National Key R&D Plan of China(Nos.2017YFC0305904,2016YFC0301201).

摘　　要：Tropical storms(TSs)can induce sea surface cooling,freshening,and phytoplankton blooms.The dissolved oxygen(DO)concentration response to TSs within an anticyclone is still unclear due to the rarity of in situ observations.In this study,we investi-gate the variations in DO concentration attributed to TS‘Haitang’within an anticyclonic eddy in the northern South China Sea based on Chinese underwater glider data.DO concentrations have a higher value at the edge of eddy than at the core.Influenced by TS,DO concentrations decrease remarkably in the subsurface layer in all three regions(inside,edge,and outside of the anticyclonic eddy).The mean DO concentrations decrease more at the edge of the anticyclone than those inside the anticyclone.The recovery time of DO concentration after TS is around one week at the edge of the anticyclone and is>10 days within the eddy.Our observations show that the DO concentrations decrease above the subsurface chlorophyll a maxima layer.Quantitative analysis shows that variations in DO concentration are dominated by horizontal advection and vertical advection terms in the subsurface layer.

关 键 词：dissolved oxygen Chinese underwater glider anticyclonic eddy tropical storm physical process 

分 类 号：P73[天文地球—海洋科学]