Study of coexisting upstream solitary wave packet and downstream wakes induced by Diaoyu Dao and its affiliated islands detected by satellite sun glitter  

作　　者：Lina Cai Xiaoqi Jiang Xiaojun Yan Yan Bai Jianqiang Liu Menghan Yu Rong Tang Jingjing Jiang 

机构地区：[1]Marine Science and Technology College,Zhejiang Ocean University,Zhoushan 316004,China [2]State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China [3]Key Laboratory of Space Ocean Remote Sensing and Application of Ministry of Natural Resources,National Satellite Ocean Application Service,Beijing 100081,China

出　　处：《Acta Oceanologica Sinica》2023年第4期1-15,共15页海洋学报（英文版）

基　　金：The Science Foundation of Donghai Laboratory under contract No.DH-2022KF01010;the Zhejiang Key Science and Technology Project under contract No.2020C02004;the Basic Public Welfare Research Program of Zhejiang Province under contract No.LGF21D010004;the Research on Group Ideological and Political Subject Teaching Model of Ocean Remote Sensing under contract No.132.

摘　　要：Taking the advantage of sun glitter(SG)observed from high-resolution satellites Gaofen-1(GF-1)and Gaofen-6(GF-6),a new method named Shield and Vortex 1-2(SAV1-2)for extracting spatial texture information from sun glitter was established.Sea surface texture detail information around Diaoyu Dao and its affiliated islands was extracted using SAV1-2.Meanwhile,the dynamic characteristics of the water environment were analyzed by combining the water color,temperature and dynamic data.The results show the following information.(1)Stable westward shield effect and eastward Karman vortex streets,extracted from SG,appear upstream(westward)and downstream(eastward)of the Diaoyu Dao and its affiliated islands respectively.(2)The dominant direction of the Kuroshio Current in the Diaoyu Dao and its affiliated islands area is east,the Diaoyu Dao and its affiliated islands interacting with Kuroshio,inducing western shield and eastern shelter and wake.Furthermore,wave intervals of the shield in front of the island range from hundreds to thousands of metres,and extend wider than the island itself.(3)Combining with high-resolution sea surface temperature(SST)and chlorophyll a(Chl a)concentration,the directional changes of water color elements are mutually supported and proved with the stable shield(wave packet)effect in the west and vortex street effect in the east.The change of SST upstream of the island(western shield area)is not significant,the temperature in the downstream shelter area decreases slightly,and the SST in the downstream wake area shows a general trend of obvious decrease.The wake area is dominated by Karman vortex streets in shape,supplementing by vortices.The concentration of Chl a in the west shield of island is as low as that in downstream shelter area,while it increases significantly in the downstream wake area with shape in eddy or ribbon.(4)The SAV methods of extracting sea surface texture detail using SG can be widely used in different sea areas and water quality.This paper can provide reference for the prot

关 键 词：sun glitter westward shield Diaoyu Dao and its affiliated islands GF-1/6 

分 类 号：P715.6[天文地球—海洋科学]