气候变化领域集成服务门户(CCPortal): Physical Mechanisms Driving Oxygen Subduction in the Global Ocean

CCPortal

DOI	10.1029/2020GL089040
	Physical Mechanisms Driving Oxygen Subduction in the Global Ocean
	Portela E.; Kolodziejczyk N.; Vic C.; Thierry V.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Future changes in subduction are suspected to be critical for the ocean deoxygenation predicted by climate models over the 21st century. However, the drivers of global oxygen subduction have not been fully described or quantified. Here, we address the physical mechanisms responsible for the oxygen transport across the late-winter mixed layer base and their relation with water mass formation. Up to 70% of the global oxygen uptake takes place during Mode Water subduction mostly in the Southern Ocean and the North Atlantic. Te driving mechanisms are (i) the combination of strong currents with large mixed-layer-depth gradients at localized hot spots and (ii) the wind-driven vertical velocity within the subtropical gyres. Oxygen diffusion, despite being underestimated in this study, is likely to play an important role in the global ocean oxygenation. The physical mass flux dominates the total oxygen subduction while the oxygen solubility plays a minor role in its modulation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climate models; Oceanography; Driving mechanism; Mixed layer depths; Oxygen diffusion; Oxygen solubility; Physical mechanism; Vertical velocity; Water-mass formation; Winter mixed layers; Oxygen; climate modeling; global ocean; gyre; mixed layer; subduction zone; water mass; Atlantic Ocean; Atlantic Ocean (North); Southern Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169768
作者单位	Université Brest, CNRS, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale (LOPS), Plouzané, France
推荐引用方式 GB/T 7714	Portela E.,Kolodziejczyk N.,Vic C.,et al. Physical Mechanisms Driving Oxygen Subduction in the Global Ocean[J],2020,47(17).
APA	Portela E.,Kolodziejczyk N.,Vic C.,&Thierry V..(2020).Physical Mechanisms Driving Oxygen Subduction in the Global Ocean.Geophysical Research Letters,47(17).
MLA	Portela E.,et al."Physical Mechanisms Driving Oxygen Subduction in the Global Ocean".Geophysical Research Letters 47.17(2020).