Interannual Salinity Variability in the Tropical Pacific in CMIP5 Simulations

doi:10.1007/s00376-018-7309-1

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Interannual Salinity Variability in the Tropical Pacific in CMIP5 Simulations
	Zhi, Hai 1; Zhang, Rong-Hua2,3,4 ; Lin, Pengfei 4,5; Yu, Peng 6
刊名	ADVANCES IN ATMOSPHERIC SCIENCES
	2019-04-01
卷号	36 期号:4 页码:378-396
关键词	mixed-layer salinity salt budget interannual variability tropical Pacific model simulation
ISSN号	0256-1530
DOI	10.1007/s00376-018-7309-1
通讯作者	Zhang, Rong-Hua(rzhang@qdio.ac.cn)
英文摘要	Salinity variability and its causes in the tropical Pacific are analyzed using observations, reanalysis products and model simulations. The mixed-layer salinity (MLS) budget analyses from observations and reanalysis products indicate that its interannual evolution is closely related to ENSO and is predominantly governed by surface forcing and surface advection in the western-central equatorial Pacific. It is found that the observed MLS tendency leads Nino3.4 by about 12 months due to the effect of negative freshwater flux (evaporation minus precipitation). These observation-based analyses are used to evaluate the corresponding simulation using GFDL-ESM2M. It is evident that the model can simulate the spatiotemporal variations of MLS with some discrepancies compared to observations. In the warm pool of the equatorial Pacific the MLS tendency in the model is sensitive to ocean dynamics, however model biases cause the tendency to be underestimated. In particular, the freshwater flux is overestimated while the ocean surface zonal current and vertical velocity at the base of the mixed layer are underestimated. Due to model biases in representing the related physics, the effects of surface forcing on the simulated MLS budget are overestimated and those of subsurface and surface advection are relatively weak. Due to weaker surface advection and subsurface forcing than observed, the simulated compensations for surface forcing are suppressed, and the simulated MLS tendency that leads Nino3.4 by 8-10 months, which is shorter than the observed lead time. These results are useful for the interpretation of observational analyses and other model simulations in the tropical Pacific.
资助项目	National Natural Science Foundation of China[41690122] ; National Natural Science Foundation of China[41690120] ; National Natural Science Foundation of China[41475101] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1406401] ; NSFC Innovative Group Grant[41421005] ; Taishan Scholarship
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000457361700004
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/160888]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Zhang, Rong-Hua
作者单位	1.Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing 210044, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao 266237, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China 6.Univ Maryland, Cooperat Inst Climate & Satellites, College Pk, MD 20740 USA
推荐引用方式 GB/T 7714	Zhi, Hai,Zhang, Rong-Hua,Lin, Pengfei,et al. Interannual Salinity Variability in the Tropical Pacific in CMIP5 Simulations[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2019,36(4):378-396.
APA	Zhi, Hai,Zhang, Rong-Hua,Lin, Pengfei,&Yu, Peng.(2019).Interannual Salinity Variability in the Tropical Pacific in CMIP5 Simulations.ADVANCES IN ATMOSPHERIC SCIENCES,36(4),378-396.
MLA	Zhi, Hai,et al."Interannual Salinity Variability in the Tropical Pacific in CMIP5 Simulations".ADVANCES IN ATMOSPHERIC SCIENCES 36.4(2019):378-396.