Internal solitary wave generation by the tidal flows beneath ice keel in the Arctic Ocean  

作　　者：Peiwen ZHANG Qun LI Zhenhua XU Baoshu YIN 

机构地区：[1]CAS Key Laboratory of Ocean Circulation and Waves,Institute of Oceanology Chinese Academy of Sciences,Qingdao 266071,China [2]Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China [3]Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China [4]College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [5]MNR Key Laboratory for Polar Science,Polar Research Institute of China,Shanghai 200136,China [6]CAS Engineering Laboratory for Marine Ranching,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China

出　　处：《Journal of Oceanology and Limnology》2022年第3期831-845,共15页海洋湖沼学报（英文）

基　　金：Supported by the National Key Research and Development Program of China and National Natural Science Foundation of China(Nos.2019YFE0105700,2016YFC1402705,2017YFA0604102,92058202,91858103,42176244,2016YFC1401404);the Strategic Priority Research Program of Chinese Academy of Sciences(Nos.XDA22050202,XDB42000000);the CAS Key Research Program of Frontier Sciences and Key Deployment Project of Centre for Ocean Mega-Research of Science(Nos.QYZDB-SSW-DQC024,COMS2020Q07);the project jointly funded by the CAS and CSIRO(No.133244KYSB20190031)。

摘　　要：A series of non-hydrostatic,non-linear numerical simulations were carried out to investigate the generation and evolution of internal solitary waves(ISWs)through the interaction of a barotropic tidal current with an ice keel in the Arctic Ocean.During the interaction process,the internal surge was generated at first,and then the wave gradually steepened due to non-linearity during its propagation away from the ice keel.The internal surge eventually disintegrated into multi-modal and rank-ordered ISW packets with the largest having an amplitude of O(10)m.Sensitivity experiments demonstrated that the ISWs’amplitudes and energy were proportional to the varying ice keel depths and barotropic tidal fl ow amplitudes,but were insensitive to the changing ice keel widths.Typical ISWs can enhance the turbulent dissipation rate of O(10^(-6))W/kg along their propagation path.Further,heat entrainment induced by the wave-ice interaction can reach O(10)MJ/m per tidal cycle.This study reveals a particular ISW generation mechanism and process in the polar ice environment,which could be important in impacting the energy transfer and heat balance in the Arctic Ocean.

关 键 词：internal solitary wave(ISW) barotropic tidal flow ice keel the Arctic Ocean 

分 类 号：P731.2[天文地球—海洋科学]