气候变化领域集成服务门户(CCPortal): A Model Investigation of the Influences of the South-East Madagascar Current on the South-East Madagascar Bloom

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DOI	10.1029/2019JC015761
	A Model Investigation of the Influences of the South-East Madagascar Current on the South-East Madagascar Bloom
	Dilmahamod A.F.; Penven P.; Aguiar-González B.; Reason C.J.C.; Hermes J.C.
发表日期	2020
ISSN	21699275
卷号	125 期号:6
英文摘要	The South-East Madagascar Bloom, one of the most compelling biogeochemical features of the Indian Ocean, occurs sporadically during austral summer in the oligotrophic waters south-east of Madagascar, where it can cover up to 1% of the global ocean surface area. Its spatial extension and its timing are highly variable. A high-resolution biophysical model is used to investigate a previous hypothesis that the onset of a particular circulation of the South-East Madagascar Current advects fresher and nutrient-rich waters eastward, feeding the bloom. The model is able to reproduce an intermittent phytoplankton bloom with large spatial variability but in the subsurface layers, as well as the presence of an irregular retroflection of the South-East Madagascar Current. The simulated bloom occurs within a shallow stratified mixed layer, with fresher waters at the surface, parallel to the water mass in an observed bloom. The model results suggest, from a nutrient flux analysis, that horizontal advection of low-salinity nutrient-rich Madagascan coastal waters can indeed trigger a phytoplankton bloom. The coupled model is also able to resolve a bloom that is atmospherically forced by cyclonic activity. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Biogeochemical Modeling; Phytoplankton Bloom; South-East Madagascar Bloom; South-East Madagascar Current; South-West Indian Ocean
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/186848
作者单位	Department of Oceanography, University of Cape Town, Cape Town, South Africa; Université de Bretagne Occidentale, CNRS, IRD,Ifremer, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Brest, France; Egagasini Node, South African Environmental Observation Network, Cape Town, South Africa; Now at GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Now at Department of Oceanography, Dalhousie University, Halifax, NS, Canada; Departamento de Fisica, Facultad de Ciencias del Mar, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain; Ocean Sciences Department, Nelson Mandela University (NMU)Port Elizabeth, South Africa
推荐引用方式 GB/T 7714	Dilmahamod A.F.,Penven P.,Aguiar-González B.,et al. A Model Investigation of the Influences of the South-East Madagascar Current on the South-East Madagascar Bloom[J],2020,125(6).
APA	Dilmahamod A.F.,Penven P.,Aguiar-González B.,Reason C.J.C.,&Hermes J.C..(2020).A Model Investigation of the Influences of the South-East Madagascar Current on the South-East Madagascar Bloom.Journal of Geophysical Research: Oceans,125(6).
MLA	Dilmahamod A.F.,et al."A Model Investigation of the Influences of the South-East Madagascar Current on the South-East Madagascar Bloom".Journal of Geophysical Research: Oceans 125.6(2020).