气候变化领域集成服务门户(CCPortal): Extreme Phytoplankton Blooms in the Southern Tropical Indian Ocean in 2011

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DOI	10.1029/2019JC015649
	Extreme Phytoplankton Blooms in the Southern Tropical Indian Ocean in 2011
	Liao X.; Du Y.; Wang T.; He Q.; Zhan H.; Hu S.; Wu G.
发表日期	2020
ISSN	21699275
卷号	125 期号:4
英文摘要	This study investigates extreme phytoplankton blooms in the southern tropical Indian Ocean (TIO) in January–April 2011 using the extended ocean color products and in situ data. The amplitude of the blooms was approximately 4 times higher than the climatological value and 2 times higher than that in 1998–1999. The anomalous enhancement of surface chlorophyll-a concentration (Chla) was associated with the strong upwelling Rossby waves that forced by the extraordinary strong wind stress curl in the southeastern TIO during 2010–2011 La Niña, which was much stronger than that of 1998–1999 La Niña. The Rossby waves uplifted the thermocline, which was shoaled by more than 70 m relative to the climatology. The results of the nonlinear 1.5-layer reduced-gravity model further suggest that the thermocline variations are mainly due to the wind stress curl over the interior TIO. In the vertical direction, the Argo data show a distinct upward and westward propagation of subsurface cooling, indicating that the upwelling of cold nutrient-rich waters leads to the abnormally high Chla. The strong upwelling processes are also well captured by the Moored Array for African-Asian-Australian Monsoon Analysis and Prediction observations at 8°S, 80.5°E. Based on the climatological in situ nitrate data, the Rossby wave-induced nitrate supply and potential new production at the mooring site are estimated. The potential f ratio ranges from 50% to 87% when the water brought to the surface is assumed to have originated from 60 to 200 m, thus indicating the dominant role of nutrient supply by the upwelling processes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	La Niña; phytoplankton bloom; Rossby wave; southern tropical Indian Ocean; upwelling
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186930
作者单位	MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area and Guangdong Key Laboratory of Urban Informatics and Shenzhen Key Laboratory of Spatial Smart Sensing and Services, Shenzhen University, Shenzhen, China; College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China; State Key Laboratory of Tropical Oceanography (LTO), South China Sea Institute of Oceanology (SCSIO), Chinese Academy of Sciences (CAS), Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
推荐引用方式 GB/T 7714	Liao X.,Du Y.,Wang T.,et al. Extreme Phytoplankton Blooms in the Southern Tropical Indian Ocean in 2011[J],2020,125(4).
APA	Liao X..,Du Y..,Wang T..,He Q..,Zhan H..,...&Wu G..(2020).Extreme Phytoplankton Blooms in the Southern Tropical Indian Ocean in 2011.Journal of Geophysical Research: Oceans,125(4).
MLA	Liao X.,et al."Extreme Phytoplankton Blooms in the Southern Tropical Indian Ocean in 2011".Journal of Geophysical Research: Oceans 125.4(2020).