气候变化领域集成服务门户(CCPortal): Mapping Areas of the Southern Ocean Where Productivity Likely Depends on Dust-Delivered Iron

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DOI	10.1029/2019JD030926
	Mapping Areas of the Southern Ocean Where Productivity Likely Depends on Dust-Delivered Iron
	Tatlhego M.; Bhattachan A.; Okin G.S.; D'Odorico P.
发表日期	2020
ISSN	2169897X
卷号	125 期号:3
英文摘要	The existence of low-productivity areas in the Southern Ocean has been related to limited supply of bioavailable iron from terrestrial sources of dust. Dust-delivered iron can be crucial to ocean productivity, though alternative mechanisms have also been identified. To explore the geographic distribution of areas limited in the delivery of iron-rich atmospheric dust in the austral summer, we calculate forward trajectories from continental sources in the Southern Hemisphere between 2007 and 2015. A statistical comparison between trajectory patterns and maps of chlorophyll-a, an indicator of ocean productivity, shows a significant positive correlation in ocean areas between 45°S and 65°S, consistent with the dust deposition hypothesis. Likewise, considering the area south of 45°S, while excluding the coastal belt of Antarctica, a positive correlation is also found. These results suggest the existence of two potential sources of bioavailable iron to the Southern Ocean that determine its productivity patterns: aeolian transport from dust sources into the open Southern Ocean and coastal sediment and upwelling in the coastal Antarctic Ocean. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aeolian dust; chlorophyll-a; HYSPLIT; soluble iron; Southern Ocean
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186191
作者单位	Department of Environmental Science, Policy and Management, University of California, Berkeley, CA, United States; Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, United States; Department of Geography, University of California, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Tatlhego M.,Bhattachan A.,Okin G.S.,et al. Mapping Areas of the Southern Ocean Where Productivity Likely Depends on Dust-Delivered Iron[J],2020,125(3).
APA	Tatlhego M.,Bhattachan A.,Okin G.S.,&D'Odorico P..(2020).Mapping Areas of the Southern Ocean Where Productivity Likely Depends on Dust-Delivered Iron.Journal of Geophysical Research: Atmospheres,125(3).
MLA	Tatlhego M.,et al."Mapping Areas of the Southern Ocean Where Productivity Likely Depends on Dust-Delivered Iron".Journal of Geophysical Research: Atmospheres 125.3(2020).