气候变化领域集成服务门户(CCPortal): Rapid transfer of oxygen to the deep ocean mediated by bubbles

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DOI	10.1038/s41561-020-0532-2
	Rapid transfer of oxygen to the deep ocean mediated by bubbles
	Atamanchuk D.; Koelling J.; Send U.; Wallace D.W.R.
发表日期	2020
ISSN	17520894
卷号	13 期号:3
英文摘要	The concentration of oxygen exerts major controls on life in the ocean, and its distribution in the ocean and atmosphere carries information about biological productivity, transports of mass and heat, ocean deoxygenation and global carbon sinks. Our understanding of processes underlying oxygen distributions, their key features and variability is often lacking. Here we investigate the magnitude, variability and uncertainty of the air–sea flux of oxygen, carbon dioxide and atmospheric potential oxygen over an annual cycle in the Labrador Sea. We demonstrate that two-thirds of the annual oxygen uptake occurs over only 40 days in winter and is associated with a bubble-mediated component of air–sea gas transfer linked to episodic high winds, strong cooling and deep convective mixing. By neglecting the bubble-mediated flux component, global models may underestimate oxygen and atmospheric potential oxygen uptake in regions of convective deep-water formation by up to an order of magnitude. Uncertainties in wind speed products lead to additional major (up to 80%) uncertainty in air–sea fluxes in these critical regions. Our findings may help explain observation–model discrepancies in distributions of atmospheric potential oxygen and imply that oxygen levels in the deep ocean are more sensitive to climate change than currently thought. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	air-sea interaction; annual cycle; bubble; carbon dioxide; climate change; cooling; deep sea; oxygen; wind velocity; Atlantic Ocean; Labrador Sea
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124500
作者单位	Department of Oceanography, Dalhousie University, Halifax, NS, Canada; Scripps Institution of Oceanography, UCSD, La Jolla, CA, United States
推荐引用方式 GB/T 7714	Atamanchuk D.,Koelling J.,Send U.,et al. Rapid transfer of oxygen to the deep ocean mediated by bubbles[J],2020,13(3).
APA	Atamanchuk D.,Koelling J.,Send U.,&Wallace D.W.R..(2020).Rapid transfer of oxygen to the deep ocean mediated by bubbles.Nature Geoscience,13(3).
MLA	Atamanchuk D.,et al."Rapid transfer of oxygen to the deep ocean mediated by bubbles".Nature Geoscience 13.3(2020).