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

doi:10.1175/JCLI-D-18-0430.1

	Freshwater Flux and Ocean Chlorophyll Produce Nonlinear Feedbacks in the Tropical Pacific
	Zhang, Rong-Hua 1,2,3,4; Tian, Feng 1,3; Busalacchi, Antonio J.5; Wang, Xiujun 6,7
通讯作者	Zhang, Rong-Hua(rzhang@qdio.ac.cn)
	2019-04-01
发表期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
卷号	32 期号:7 页码:2037-2055
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.
关键词	Pacific Ocean Atmosphere-ocean interaction ENSO Freshwater Coupled models Ecological models
DOI	10.1175/JCLI-D-18-0430.1
关键词[WOS]	HYBRID COUPLED MODEL ; NINO-SOUTHERN OSCILLATION ; EL-NINO ; PENETRATIVE RADIATION ; GENERAL-CIRCULATION ; COLOR DATA ; CLIMATE ; ENSO ; BIOLOGY ; VARIABILITY
收录类别	SCI ; SCI
语种	英语
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研究方向	Meteorology & Atmospheric Sciences
项目资助者	National Natural Science Foundation of China ; NSFC-Shandong Joint Fund forMarine Science Research Centers ; Taishan Scholarship
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000461788600001
出版者	AMER METEOROLOGICAL SOC
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/14192
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.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao, Peoples R China 5.UCAR, Boulder, CO USA 6.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing, Peoples R China 7.Joint Ctr Global Change Studies, Beijing, 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.