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学科主题: Multidisciplinary Sciences
题名: Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs
作者: [Xie Qiang ; Xiao JinGen ; Wang DongXiao] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Xiao JinGen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China ; [Xie Qiang] Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China ; [Yu YongQiang] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Sci & Geophys Fluid Dynam, Beijing 100029, Peoples R China
通讯作者: dxwang@scsio.ac.cn
关键词: quasi-global ocean model ; deep-layer and bottom SCS circulations ; model evaluation
刊名: CHINESE SCIENCE BULLETIN
发表日期: 2013
卷: 58, 期:32, 页:4000-4011
部门归属: LTO
资助者: This work was supported by the National Basic Research Program of China (41276024 and 41276024), the Knowledge Innovation Engineering Frontier Project of Sanya Institute of Deep Sea Science and Engineering (SIDSSE-201205), and Sanya and Chinese Academy of Sciences Cooperation Project (2012YD01).
摘要: This study is a preliminary analysis of the South China Sea (SCS) deep circulations using eight quasi-global high-resolution ocean model outputs. The goal is to assess models' ability to simulate these deep circulations. The analysis reveals that models' deep temperatures are colder than the observations in the World Ocean Atlas, while most models' deep salinity values are higher than the observations, indicating models' deep water is generally colder and saltier than the reality. Moreover, there are long-term trends in both temperature and salinity simulations. The Luzon Strait transport below 1500 m is 0.36 Sv when averaged for all models, smaller compared with the observation, which is about 2.5 Sv. Four assimilated models and one unassimilated (OCCAM) display that the Luzon deep-layer overflow reaches its minimum in spring and its maximum in winter. The vertically integrated streamfunctions below 2400 m from these models show a deep cyclonic circulation in the SCS on a large scale, but the pattern is different from the diagnostic streamfunction from the U.S Navy Generalized Digital Environment Model (GDEM-Version 3.0, GDEMv3). The meridional overturning structure above 1000 m is similar in all models, but the spatial distribution and intensity below 1500 m are quite different from model to model. Moreover, the meridional overturning below 2400 m in these models is weaker than that of the GDEMv3, which indicates a deep vertical mixing process in these models is biased weak. Based on the above evaluation, this paper discusses the impacts of T/S initial value, topography, and mixing scheme on the SCS deep circulations, which may provide a reference for future model improvement.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000326827900016
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10871
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[Xie Qiang; Xiao JinGen; Wang DongXiao] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Xiao JinGen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Xie Qiang] Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China; [Yu YongQiang] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Sci & Geophys Fluid Dynam, Beijing 100029, Peoples R China.Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs,CHINESE SCIENCE BULLETIN,2013,58(32):4000-4011
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