Frontogenesis and Frontolysis of a Cold Filament Driven by the Cross-Filament Wind and Wave Fields Simulated by a Large Eddy Simulation  

作　　者：Guojing LI Dongxiao WANG Changming DONG Jiayi PAN Yeqiang SHU Zhenqiu ZHANG 

机构地区：[1]State Key Laboratory of Tropical Oceanography,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China [2]Shool of Marine Sciences,Nanjing University of Information Science and Technology,Nanjing 210044,China [3]School of Geography and Environment,Jiangxi Normal University,Nanchang 330022,China [4]Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519080,China

出　　处：《Advances in Atmospheric Sciences》2024年第3期509-528,共20页大气科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 92158204, 41506001 and 42076019);a Project supported by the Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) (Grant No. 311021005)。

摘　　要：The variations of the frontogenetic trend of a cold filament induced by the cross-filament wind and wave fields are studied by a non-hydrostatic large eddy simulation. Five cases with different strengths of wind and wave fields are studied.The results show that the intense wind and wave fields further break the symmetries of submesoscale flow fields and suppress the levels of filament frontogenesis. The changes of secondary circulation directions—that is, the conversion between the convergence and divergence of the surface cross-filament currents with the downwelling and upwelling jets in the filament center—are associated with the inertial oscillation. The filament frontogenesis and frontolysis caused by the changes of secondary circulation directions may periodically sharpen and smooth the gradient of submesoscale flow fields.The lifecycle of the cold filament may include multiple stages of filament frontogenesis and frontolysis.

关 键 词：cold filament FRONTOGENESIS FRONTOLYSIS large eddy simulation 

分 类 号：P441[天文地球—大气科学及气象学]