SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Wintertime Phytoplankton Blooms in the Western Equatorial Indian Ocean Associated With the Madden-Julian Oscillation
Liao, XM; Du, Y; Zhan, HG; Wang, TY; Feng, M; duyan@scsio.ac.cn
2018
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
Volume122Issue:12Pages:9855-9869
AbstractThis study investigated boreal wintertime phytoplankton blooms in the western equatorial Indian Ocean (WEIO) and the underlying physical mechanisms. The Sea viewing Wide field of View sensor (SeaWiFS) chlorophyll-a (Chla) concentrations show that phytoplankton blooms occur in the WEIO during December-March. The development of these blooms is not only a seasonal process but also consists of 2-3 intraseasonal events induced by the Madden-Julian Oscillation (MJO). During a typical intraseasonal event, enhanced cross-equatorial wind induces strong upwelling and ocean mixing, thus increasing the supply of nutrients to the surface in equatorial regions. Argo profiles clearly show various responses to the intraseasonal wind bursts, including shoaling of the thermocline and deepening of the mixed layer. Further analysis reveals that the former is the dominant mechanism for the blooms along the equator, while the latter controls the high Chla concentrations off the coast of Somalia. Surface ocean circulations not only account for the blooms south of the equator but also modulate the thermocline depth in the WEIO. The shallower thermocline during the early period of the northeast monsoon season provides favorable conditions for a stronger Chla response to intraseasonal forcing.
Department[Liao, Xiaomei; Du, Yan; Zhan, Haigang; Wang, Tianyu] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China; [Liao, Xiaomei] Shenzhen Univ, Key Lab Geoenvironm Monitoring Coastal Zone, Natl Adm Surveying Mapping & Geoinformat, Shenzhen, Peoples R China; [Liao, Xiaomei] Shenzhen Univ, Shenzhen Key Lab Spatial Temporal Smart Sensing &, Shenzhen, Peoples R China; [Liao, Xiaomei] Shenzhen Univ, Coll Life Sci & Oceanog, Shenzhen, Peoples R China; [Liao, Xiaomei; Du, Yan; Wang, Tianyu] Univ Chinese Acad Sci, Beijing, Peoples R China; [Zhan, Haigang] Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Key Lab Ocean Remote Sensing, Guangzhou, Guangdong, Peoples R China; [Feng, Ming] CSIRO Oceans & Atmosphere, IOMRC, Crawley, WA, Australia
KeywordPhytoplankton Bloom Western Equatorial Indian Ocean Upwelling Ocean Mixing Madden-julian Oscillation
Subject AreaOceanography
Funding ProjectLTO
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17114
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorduyan@scsio.ac.cn
Recommended Citation
GB/T 7714
Liao, XM,Du, Y,Zhan, HG,et al. Wintertime Phytoplankton Blooms in the Western Equatorial Indian Ocean Associated With the Madden-Julian Oscillation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2018,122(12):9855-9869.
APA Liao, XM,Du, Y,Zhan, HG,Wang, TY,Feng, M,&duyan@scsio.ac.cn.(2018).Wintertime Phytoplankton Blooms in the Western Equatorial Indian Ocean Associated With the Madden-Julian Oscillation.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,122(12),9855-9869.
MLA Liao, XM,et al."Wintertime Phytoplankton Blooms in the Western Equatorial Indian Ocean Associated With the Madden-Julian Oscillation".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 122.12(2018):9855-9869.
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