Quantitative Analysis of the Feedback Induced by the Freshwater Flux in the Tropical Pacific Using CMIP5

IOCAS-IR

	Quantitative Analysis of the Feedback Induced by the Freshwater Flux in the Tropical Pacific Using CMIP5
	ZHI Hai ; ZHANG Rong-Hua; LIN Pengfei ; WANG Lanning
发表期刊	Advances in Atmospheric Sciences
ISSN	0256-1530
	2015-10-10
出版年	2015
卷号	v.32 期号:10 页码:25-37
文献类型	CNKI期刊论文
摘要	Freshwater flux(FWF) directly affects sea surface salinity(SSS) and hence modulates sea surface temperature(SST) in the tropical Pacific. This paper quantifies a positive correlation between FWF and SST using observations and simulations of the fifth phase of the Coupled Model Intercomparison Project(CMIP5) to analyze the interannual variability in the tropical Pacific. Comparisons among the displacements of FWF,SSS and SST interannual variabilities illustrate that a large FWF variability is located in the west-central equatorial Pacific,covarying with a large SSS variability,whereas a large SST variability is located in the eastern equatorial Pacific. Most CMIP5 models can reproduce the fact that FWF leads to positive feedback to SST through an SSS anomaly as observed. However,the difference in each model's performance results from different simulation capabilities of the CMIP5 models in the magnitudes and positions of the interannual variabilities,including the mixed layer depth and the buoyancy flux in the equatorial Pacific. SSS anomalies simulated from the CMIP5 multi-model are sensitive to FWF interannual anomalies,which can lead to differences in feedback to interannual SST variabilities. The relationships among the FWF,SSS and SST interannual variabilities can be derived using linear quantitative measures from observations and the CMIP5 multi-model simulations. A 1 mm d-1FWF anomaly corresponds to an SSS anomaly of nearly0.12 psu in the western tropical Pacific and a 0.11?C SST anomaly in the eastern tropical Pacific.
关键词	feedback,freshwater flux,CMIP5,correlation
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A009;A010;
CNKI专题名称	气象学;海洋学;
分类号	P732;P731
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	supported by the National Natural Science Foundation of China (NSFC)(Grant Nos.41376039,41376019 and 41475101) ; the NSFC–Shandong Joint Fund for Marine Science Research Centers (Grant No.U1406401) ; the NSFC Innovative Group Grant (Project No.41421005) ; the Institute of Oceanology,Chinese Academy of Sciences (IOCAS) through the Chinese Academy of Sciences Strategic Priority Project [the Western Pacific Ocean System (WPOS)] ; supported by the Joint Center for Global Change Studies (Project No.105019) ; the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/189901
专题	中国科学院海洋研究所
作者单位	1.TheEarthSystemModelingCenterandCollegeofAtmosphericSciences,NanjingUniversityofInformationScienceandTechnology 2.KeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences 3.StateKeyLaboratoryofNumericalModelingforAtmosphericSciencesandGeophysicalFluidDynamics,InstituteofAtmosphericPhysics,ChineseAcademyofSciences 4.CollegeofGlobalChangeandEarthSystemScience,BeijingNormalUniversity
推荐引用方式 GB/T 7714	ZHI Hai,ZHANG Rong-Hua,LIN Pengfei,et al. Quantitative Analysis of the Feedback Induced by the Freshwater Flux in the Tropical Pacific Using CMIP5. 2015.