Geographical inhomogeneity and temporal variability of mixing property and driving mechanism in the Arctic Ocean

作     者：Jia YOU Zhenhua XU Robin ROBERTSON Qun LI Baoshu YIN Jia YOU;Zhenhua XU;Robin ROBERTSON;Qun LI;Baoshu YIN

作者机构：CAS Key Laboratory of Ocean Circulation and WavesInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Center for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China College of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 100049China CAS Engineering Laboratory for Marine RanchingInstitute of OceanologyChinese Academy of SciencesQingdao 266071China China-Asean College of Marine ScienceXiamen University MalaysiaSepang 43900Malaysia MNR Key Laboratory for Polar SciencePolar Research Institute of ChinaShanghai 200120China 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2022年第40卷第3期

页      面：846-869页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0707[理学-海洋科学] 0706[理学-大气科学] 

基　　金：Supported by the National Key Research and Development Program of China(Nos.2019YFE0105700,2017YFA0604102) the Strategic Priority Research Program of Chinese Academy of Sciences(Nos.XDB42000000,XDA22050202) the National Natural Science Foundation of China(Nos.92058202,41676006,42176244) the Key Deployment Project of Centre for Ocean Mega-Research of Science,Chinese Academy of Sciences(No.COMS2020Q07) the CAS-CSIRO Jointly MHW Project(No.133244KYSB20190031) 

主　　题：mixing the Arctic Ocean near-inertial waves stratification heat flux 

摘      要：Upper ocean mixing plays a key role in the atmosphere-ocean heat transfer and sea ice extent and thickness via modulating the upper ocean temperatures in the Arctic *** of diffusivities in the Arctic that directly indicate the ocean mixing properties are ***,the spatiotemporal pattern and magnitude of diapycnal diffusivities and kinetic energy dissipation rates in the upper Arctic Ocean are important for atmosphere-ocean heat transfers and sea ice *** were first estimated from the Ice-Tethered Profilers dataset(2005–2019)using a strain-based fine-scale *** resultant mixing properties showed signifi cant geographical inhomogeneity and temporal *** diff usivities and dissipation rates in the Atlantic sector of the Arctic Ocean were stronger than those on the Pacific *** in the Atlantic sector increased significantly during the observation period;whereas in the Pacific sector,it weakened before 2011 and then *** impact factors include wind,sea ice,near inertial waves,and stratifi cation,while their relative contributions vary between the two sectors of the Arctic *** the Atlantic sector,turbulent mixing dominated,while in the Pacific sector,turbulent mixing was inhibited by strong stratification prior to 2011,and is able to overcome the stratifi cation gradually after *** vertical turbulent heat fl ux constantly increased in the Atlantic sector year by year,while it decreased in the Pacific sector post *** estimated heat flux variability induced by enhanced turbulent mixing is expected to continue to diminish sea ice in the near future.