IOCAS-IR  > 海洋环流与波动重点实验室
Freshwater Flux and Ocean Chlorophyll Produce Nonlinear Feedbacks in the Tropical Pacific
Zhang, Rong-Hua1,2,3,4; Tian, Feng1,3; Busalacchi, Antonio J.5; Wang, Xiujun6,7
2019-04-01
Source PublicationJOURNAL OF CLIMATE
ISSN0894-8755
Volume32Issue:7Pages:2037-2055
Corresponding AuthorZhang, Rong-Hua(rzhang@qdio.ac.cn)
AbstractVarious 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.
KeywordPacific Ocean Atmosphere-ocean interaction ENSO Freshwater Coupled models Ecological models
DOI10.1175/JCLI-D-18-0430.1
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000461788600001
PublisherAMER METEOROLOGICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/154914
Collection海洋环流与波动重点实验室
Corresponding AuthorZhang, Rong-Hua
Affiliation1.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
First Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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.
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