Seasonal variability of the wind-generated near-inertial energy flux in the South China Sea  

作　　者：Baonan Sun Zhan Lian Yeli Yuan Haiyang Xu 

机构地区：[1]College of Oceanic and Atmospheric Sciences,Ocean University of China [2]Key Laboratory of Marine Science and Numerical Modeling,First Institute of Oceanography,Ministry of Natural Resources [3]Laboratory for Regional Oceanography and Numerical Modeling,Pilot National Laboratory for Marine Science and Technology (Qingdao)

出　　处：《Acta Oceanologica Sinica》2019年第4期136-145,共10页海洋学报（英文版）

基　　金：The National Natural Science Foundation of China under contract No.40976016;the Basic Scientific Fund for the National Public Research Institutes of China under contract No.GY0217Q06;the National Science and Technology Major Project of the Ministry of Science and Technology of China under contract No.2018YFF01014100;the Natural Science Foundation of Shandong Province,China under contract No.ZR2015PD009

摘　　要：After validated by the in-situ observation, the slab model is used to study the wind-generated near-inertial energy flux(NIEF) in the South China Sea(SCS) based on satellite-observed wind data, and its dependence on calculation methods and threshold criteria of the mixed layer depth(MLD) is investigated. Results illustrate that the total amount of NIEF in the SCS could be doubled if different threshold criteria of MLD are adopted. The NIEF calculated by the iteration and spectral solutions can lead to a discrepancy of 2.5 GW(1 GW=1×109 W). Results also indicate that the NIEF exhibits spatial and temporal variations, which are significant in the boreal autumn,and in the southern part of the SCS. Typhoons are an important generator of NIEF in the SCS, which could account for approximately 30% of the annual mean NIEF. In addition, deepening of the MLD due to strong winds could lead to a decrease of NIEF by approximately by 10%. We re-estimate the annual mean NIEF in the SCS,which is(10±4) GW and much larger than those reported in previous studies.After validated by the in-situ observation, the slab model is used to study the wind-generated near-inertial energy flux(NIEF) in the South China Sea(SCS) based on satellite-observed wind data, and its dependence on calculation methods and threshold criteria of the mixed layer depth(MLD) is investigated. Results illustrate that the total amount of NIEF in the SCS could be doubled if different threshold criteria of MLD are adopted. The NIEF calculated by the iteration and spectral solutions can lead to a discrepancy of 2.5 GW(1 GW=1×109 W). Results also indicate that the NIEF exhibits spatial and temporal variations, which are significant in the boreal autumn,and in the southern part of the SCS. Typhoons are an important generator of NIEF in the SCS, which could account for approximately 30% of the annual mean NIEF. In addition, deepening of the MLD due to strong winds could lead to a decrease of NIEF by approximately by 10%. We re-estimate the annual mean NIEF in the SCS,which is(10±4) GW and much larger than those reported in previous studies.

关 键 词：near-inertial energy FLUX mixed layer DEPTH SOUTH China Sea TYPHOON 

分 类 号：P[天文地球]