Role of wind forcing and eddy activity in the intraseasonal variability of the barrier layer in the South China Sea
Liang, ZL; Xie, Q; Zeng, LL; Wang, DX; zenglili@scsio.ac.cn
2018
发表期刊OCEAN DYNAMICS
卷号68期号:3页码:363-375
摘要In addition to widely discussed seasonal variability, the barrier layer (BL) of the South China Sea (SCS) also exhibits significant intraseasonal variability (ISV) and plays an important role in the upper heat and salt balances. The characteristics and mechanisms of spatiotemporal variations in the BL are investigated using an eddy-resolving ocean model OFES (OGCM For the Earth Simulator) ouput and related atmospheric and oceanic processes. The active intraseasonal BL variability in the SCS occurs mainly during the late summer/autumn and winter and exhibits remarkable differences between these two periods. The BL ISV in late summer/autumn occurs in the southern basin, while in winter, it is limited to the northwestern basin. To further discuss the evolution and driving thermodynamic mechanisms, we quantify the processes that control the variability of intraseasonal BL. Different mechanisms for the intraseasonal BL variability for these two active periods are investigated based on the case study and composite analysis. During late summer/autumn, the active BL in the southern basin is generated by advected and local freshwater, and then decays rapidly with the enhanced wind. In winter, anticyclonic eddy activity is associated with the evolution of the BL by affecting the thermocline and halocline variations, while wind stress and wind stress curl have no obvious influence on BL.
部门归属[Liang, Zhanlin; Xie, Qiang; Zeng, Lili; Wang, Dongxiao] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog LTO, Guangzhou, Guangdong, Peoples R China; [Liang, Zhanlin] Univ Chinese Acad Sci, Beijing, Peoples R China; [Xie, Qiang] Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China; [Xie, Qiang] Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Peoples R China
关键词South China Sea Intraseasonal Variability Barrier Layer Wind Stress Eddy Kinetic Energy
学科领域Oceanography
资助项目LTO
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/17093
专题热带海洋环境国家重点实验室(LTO)
通讯作者zenglili@scsio.ac.cn
推荐引用方式
GB/T 7714
Liang, ZL,Xie, Q,Zeng, LL,et al. Role of wind forcing and eddy activity in the intraseasonal variability of the barrier layer in the South China Sea[J]. OCEAN DYNAMICS,2018,68(3):363-375.
APA Liang, ZL,Xie, Q,Zeng, LL,Wang, DX,&zenglili@scsio.ac.cn.(2018).Role of wind forcing and eddy activity in the intraseasonal variability of the barrier layer in the South China Sea.OCEAN DYNAMICS,68(3),363-375.
MLA Liang, ZL,et al."Role of wind forcing and eddy activity in the intraseasonal variability of the barrier layer in the South China Sea".OCEAN DYNAMICS 68.3(2018):363-375.
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