Effects on Ocean Biology Induced by El Nino-Accompanied Positive Freshwater Flux Anomalies in the Tropical Pacific

doi:10.1029/2019JC015790

IOCAS-IR > 海洋环流与波动重点实验室

	Effects on Ocean Biology Induced by El Nino-Accompanied Positive Freshwater Flux Anomalies in the Tropical Pacific
	Tian, Feng 1,2,3,4; Zhang, Rong-Hua1,2,3,4 ; Wang, Xiujun 5,6
	2020
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	125 期号:1 页码:23
通讯作者	Zhang, Rong-Hua(rzhang@qdio.ac.cn)
摘要	The El Nino and Southern Oscillation (ENSO) can induce large perturbations in freshwater flux (FWF, defined as precipitation minus evaporation) and ocean ecosystem in the tropical Pacific. However, how El Nino-induced FWF can affect the tropical Pacific ecosystem (e.g., chlorophyll) is still unknown. Here, a series of ocean-only experiments are performed using a coupled ocean-physical biogeochemistry model forced by prescribed climatological wind stress. Interannual FWF anomalies observed during the 1997-1998 El Nino event are imposed onto the ocean model in the tropical Pacific, and the related positive FWF anomalies are specified to be varying in its intensity, and the corresponding sensitivity experiments are performed to examine the ocean ecosystem response. In general, chlorophyll increases with the intensities of the El Nino-induced positive FWF anomalies at a certain strength but decreases when the positive FWF forcing is underrepresented (e.g., specified to be its half intensity). Additionally, chlorophyll in the eastern tropical Pacific keeps almost steady during the increasing stage of the El Nino-induced interannual FWF forcing and then rapidly increases after the peak stage of the FWF forcing. The phytoplankton budget and diagnostic analyses are conducted to understand the behavior of chlorophyll in response to varying intensities of FWF forcing. Chlorophyll response to varying intensities of FWF forcing depends on the iron concentration in the mixed layer, suggesting that the ocean ecosystem response may be shifted from one regime to another when FWF forcing reaches a certain intensity. These results offer insights into biophysical interactions and chlorophyll-induced feedback effects on ENSO.
DOI	10.1029/2019JC015790
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFC1404102 (2017YFC1404100)] ; National Natural Science Foundation of China (NFSC)[41690122 (41690120)] ; National Natural Science Foundation of China (NFSC)[41490644 (41490640)] ; National Natural Science Foundation of China (NFSC)[41421005] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19060102] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40000000] ; Taishan Scholarship ; China Postdoctoral Science Foundation[2019M662453]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000530025100029
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/167522
专题	海洋环流与波动重点实验室
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.Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 5.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing, Peoples R China 6.Beijing Normal Univ, Joint Ctr Global Change Studies, Beijing, Peoples R China
第一作者单位	海洋环流与波动重点实验室
通讯作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Tian, Feng,Zhang, Rong-Hua,Wang, Xiujun. Effects on Ocean Biology Induced by El Nino-Accompanied Positive Freshwater Flux Anomalies in the Tropical Pacific[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2020,125(1):23.
APA	Tian, Feng,Zhang, Rong-Hua,&Wang, Xiujun.(2020).Effects on Ocean Biology Induced by El Nino-Accompanied Positive Freshwater Flux Anomalies in the Tropical Pacific.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,125(1),23.
MLA	Tian, Feng,et al."Effects on Ocean Biology Induced by El Nino-Accompanied Positive Freshwater Flux Anomalies in the Tropical Pacific".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 125.1(2020):23.

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