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Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs
Xie Qiang1,3; Xiao JinGen1,2; Wang DongXiao1; Yu YongQiang4
2013-11-01
Source PublicationCHINESE SCIENCE BULLETIN
Volume58Issue:32Pages:4000-4011
AbstractThis 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.
SubtypeArticle
KeywordQuasi-global Ocean Model Deep-layer And Bottom Scs Circulations Model Evaluation
WOS HeadingsScience & Technology
DOI10.1007/s11434-013-5791-5
Indexed BySCI
Language英语
WOS KeywordWORLD OCEAN ; THERMOHALINE CIRCULATION ; VERTICAL DIFFUSIVITIES ; GENERAL-CIRCULATION ; ABYSSAL CIRCULATION ; PARAMETERIZATION ; DISSIPATION ; TOPOGRAPHY ; TURBULENCE ; MOMENTUM
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000326827900016
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/735
Collection深海科学研究部_海洋环流观测与数值模拟研究室
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Sci & Geophys Fluid Dynam, Beijing 100029, Peoples R China
First Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Recommended Citation
GB/T 7714
Xie Qiang,Xiao JinGen,Wang DongXiao,et al. Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs[J]. CHINESE SCIENCE BULLETIN,2013,58(32):4000-4011.
APA Xie Qiang,Xiao JinGen,Wang DongXiao,&Yu YongQiang.(2013).Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs.CHINESE SCIENCE BULLETIN,58(32),4000-4011.
MLA Xie Qiang,et al."Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs".CHINESE SCIENCE BULLETIN 58.32(2013):4000-4011.
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