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Simulation of salinity variability and the related freshwater flux forcing in the tropical Pacific: An evaluation using the Beijing normal university earth system model (BNU-ESM)
Zhi Hai1,2; Zhang Rong-Hua3; Lin Pengfei4; Wang Lanning5
2015-11-01
发表期刊ADVANCES IN ATMOSPHERIC SCIENCES
卷号32期号:11页码:1551-1564
文章类型Article
摘要The climatology and interannual variability of sea surface salinity (SSS) and freshwater flux (FWF) in the equatorial Pacific are analyzed and evaluated using simulations from the Beijing Normal University Earth System Model (BNU-ESM). The simulated annual climatology and interannual variations of SSS, FWF, mixed layer depth (MLD), and buoyancy flux agree with those observed in the equatorial Pacific. The relationships among the interannual anomaly fields simulated by BNU-ESM are analyzed to illustrate the climate feedbacks induced by FWF in the tropical Pacific. The largest interannual variations of SSS and FWF are located in the western-central equatorial Pacific. A positive FWF feedback effect on sea surface temperature (SST) in the equatorial Pacific is identified. As a response to El Nio-Southern Oscillation (ENSO), the interannual variation of FWF induces ocean processes which, in turn, enhance ENSO. During El Nio, a positive FWF anomaly in the western-central Pacific (an indication of increased precipitation rates) acts to enhance a negative salinity anomaly and a negative surface ocean density anomaly, leading to stable stratification in the upper ocean. Hence, the vertical mixing and entrainment of subsurface water into the mixed layer are reduced, and the associated El Nio is enhanced. Related to this positive feedback, the simulated FWF bias is clearly reflected in SSS and SST simulations, with a positive FWF perturbation into the ocean corresponding to a low SSS and a small surface ocean density in the western-central equatorial Pacific warm pool.
关键词Freshwater Flux Salinity Feedback Tropical Pacific Bnu-esm
DOI10.1007/s00376-015-4240-6
收录类别SCI
语种英语
WOS记录号WOS:000360861400010
引用统计
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/50423
专题海洋环流与波动重点实验室
作者单位1.Nanjing Univ Informat Sci & Technol, Earth Syst Modeling Ctr, Nanjing 210044, Jiangsu, Peoples R China
2.Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing 210044, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China
5.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing 100875, Peoples R China
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Zhi Hai,Zhang Rong-Hua,Lin Pengfei,et al. Simulation of salinity variability and the related freshwater flux forcing in the tropical Pacific: An evaluation using the Beijing normal university earth system model (BNU-ESM)[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2015,32(11):1551-1564.
APA Zhi Hai,Zhang Rong-Hua,Lin Pengfei,&Wang Lanning.(2015).Simulation of salinity variability and the related freshwater flux forcing in the tropical Pacific: An evaluation using the Beijing normal university earth system model (BNU-ESM).ADVANCES IN ATMOSPHERIC SCIENCES,32(11),1551-1564.
MLA Zhi Hai,et al."Simulation of salinity variability and the related freshwater flux forcing in the tropical Pacific: An evaluation using the Beijing normal university earth system model (BNU-ESM)".ADVANCES IN ATMOSPHERIC SCIENCES 32.11(2015):1551-1564.
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