Freshwater Flux and Ocean Chlorophyll Produce Nonlinear Feedbacks in the Tropical Pacific

doi:10.1175/JCLI-D-18-0430.1

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	Freshwater Flux and Ocean Chlorophyll Produce Nonlinear Feedbacks in the Tropical Pacific
	Zhang, Rong-Hua 1,5,6,7; Tian, Feng 1,6; Busalacchi, Antonio J.4; Wang, Xiujun 2,3
刊名	JOURNAL OF CLIMATE
	2019-04-01
卷号	32 期号:7 页码:2037-2055
关键词	Pacific Ocean Atmosphere-ocean interaction ENSO Freshwater Coupled models Ecological models
ISSN号	0894-8755
DOI	10.1175/JCLI-D-18-0430.1
通讯作者	Zhang, Rong-Hua(rzhang@qdio.ac.cn)
英文摘要	Various forcing and feedback processes coexist in the tropical Pacific, which can modulate El Nino-Southern Oscillation (ENSO). In particular, large covariabilities in chlorophyll (Chl) and freshwater flux (FWF) at the sea surface are observed during ENSO cycles, acting to execute feedbacks on ENSO through the related ocean-biology-induced heating (OBH) and FWF forcing, respectively. At present, the related effects and underlying mechanism are strongly model dependent and are still not well understood. Here, a new hybrid coupled model (HCM), developed to represent interactions between the atmosphere and ocean physics-biology (AOPB) in the tropical Pacific, is used to examine the extent to which ENSO can be modulated by interannually covarying anomalies of FWF and Chl. HCM AOPB-based sensitivity experiments indicate that individually the FWF forcing tends to amplify ENSO via its influence on the stratification and vertical mixing in the upper ocean, whereas the OBH feedback tends to damp it. While the FWF- and OBH-related individual effects tend to counteract each other, their combined effects give rise to unexpected situations. For example, an increase in the FWF forcing intensity actually acts to decrease the ENSO amplitude when the OBH feedback effects coexist at a certain intensity. The nonlinear modulation of the ENSO amplitude can happen when the FWF-related amplifying effects on ENSO are compensated for by OBH-related damping effects. The results offer insight into modulating effects on ENSO, which are evident in nature and different climate models.
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] ; National Natural Science Foundation of China[41490644] ; National Natural Science Foundation of China[41490640] ; NSFC-Shandong Joint Fund forMarine Science Research Centers[U1406402] ; Taishan Scholarship
WOS关键词	HYBRID COUPLED MODEL ; NINO-SOUTHERN OSCILLATION ; EL-NINO ; PENETRATIVE RADIATION ; GENERAL-CIRCULATION ; COLOR DATA ; CLIMATE ; ENSO ; BIOLOGY ; VARIABILITY
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000461788600001
资助机构	National Natural Science Foundation of China ; NSFC-Shandong Joint Fund forMarine Science Research Centers ; Taishan Scholarship
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/14191]
专题	第四纪科学与全球变化卓越创新中心
通讯作者	Zhang, Rong-Hua
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Joint Ctr Global Change Studies, Beijing, Peoples R China 3.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing, Peoples R China 4.UCAR, Boulder, CO USA 5.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao, Peoples R China 6.Univ Chinese Acad Sci, Beijing, Peoples R China 7.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Rong-Hua,Tian, Feng,Busalacchi, Antonio J.,et al. Freshwater Flux and Ocean Chlorophyll Produce Nonlinear Feedbacks in the Tropical Pacific[J]. JOURNAL OF CLIMATE,2019,32(7):2037-2055.
APA	Zhang, Rong-Hua,Tian, Feng,Busalacchi, Antonio J.,&Wang, Xiujun.(2019).Freshwater Flux and Ocean Chlorophyll Produce Nonlinear Feedbacks in the Tropical Pacific.JOURNAL OF CLIMATE,32(7),2037-2055.
MLA	Zhang, Rong-Hua,et al."Freshwater Flux and Ocean Chlorophyll Produce Nonlinear Feedbacks in the Tropical Pacific".JOURNAL OF CLIMATE 32.7(2019):2037-2055.