气候变化领域集成服务门户(CCPortal): Biophysical Interactions in Driving the Summer Monsoon Chlorophyll Bloom Off the Somalia Coast

CCPortal

DOI	10.1029/2019JC015549
	Biophysical Interactions in Driving the Summer Monsoon Chlorophyll Bloom Off the Somalia Coast
	Lakshmi R.S.; Chatterjee A.; Prakash S.; Mathew T.
发表日期	2020
ISSN	21699275
卷号	125 期号:3
英文摘要	The biophysical interactions along the Somali coast are discussed during summer monsoon based on a numerical model study. The Somali coast is known to be the fifth largest upwelling region of the world ocean and one of the most productive regions of the globe. Based on scattered observations, mostly dated back to 1960s, it is widely accepted that the strong chlorophyll bloom along the Somali coast during summer is driven by upwelled nutrient flux. We show that the upwelling-driven productivity is primarily limited to the northern part of the coast when examined along the shelf break off the Somalia coast. In contrast, productivity in the south of 9°N is driven by weaker upwelling in the early half of the summer monsoon but later dominated by the wind-based mixing induced entrainment and therefore shows much weaker chlorophyll concentration than the north. Further, the strong poleward alongshore currents advect the upwelled nutrients away from the southern and central parts of the coast to the north, thereby controlling the biological community over the Somali region. This abundant locally upwelled and remotely advected nutrients support the enhanced growth of diatoms in the northern part of the transect as earlier observed from in situ measurements. However, limited nutrients allow smaller phytoplankton communities to grow in the southern and central sections. We show that nitrate is the primary limiting nutrient for the phytoplankton growth in the central and southern parts of the Somalia coast. © 2020. American Geophysical Union. All Rights Reserved.
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/186940
作者单位	Indian National Centre for Ocean Information Services, Hyderabad, India
推荐引用方式 GB/T 7714	Lakshmi R.S.,Chatterjee A.,Prakash S.,et al. Biophysical Interactions in Driving the Summer Monsoon Chlorophyll Bloom Off the Somalia Coast[J],2020,125(3).
APA	Lakshmi R.S.,Chatterjee A.,Prakash S.,&Mathew T..(2020).Biophysical Interactions in Driving the Summer Monsoon Chlorophyll Bloom Off the Somalia Coast.Journal of Geophysical Research: Oceans,125(3).
MLA	Lakshmi R.S.,et al."Biophysical Interactions in Driving the Summer Monsoon Chlorophyll Bloom Off the Somalia Coast".Journal of Geophysical Research: Oceans 125.3(2020).