气候变化领域集成服务门户(CCPortal): Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning

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DOI	10.1038/s41467-021-24648-x
	Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning
	Holzer M.; DeVries T.; de Lavergne C.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Mid-depth North Pacific waters are rich in nutrients and respired carbon accumulated over centuries. The rates and pathways with which these waters exchange with the surface ocean are uncertain, with divergent paradigms of the Pacific overturning: one envisions bottom waters upwelling to 1.5 km depth; the other confines overturning beneath a mid-depth Pacific shadow zone (PSZ) shielded from mean advection. Here global inverse modelling reveals a PSZ where mean ages exceed 1400 years with overturning beneath. The PSZ is supplied primarily by Antarctic and North-Atlantic ventilated waters diffusing from below and from the south. Half of PSZ waters re-surface in the Southern Ocean, a quarter in the subarctic Pacific. The abyssal North Pacific, despite strong overturning, has mean re-surfacing times also exceeding 1400 years because of diffusion into the overlying PSZ. These results imply that diffusive transports – distinct from overturning transports – are a leading control on Pacific nutrient and carbon storage. © 2021, The Author(s).
语种	英语
scopus关键词	carbon; carbon 14; fresh water; surface water; abyssal zone; diffusion; overturn; upwelling; ventilation; air conditioning; Antarctica; Article; carbon storage; deep sea; diffusion; hydrography; latitude; mean transit time; North Atlantic deep water; ocean circulation; salinity; Southern Hemisphere; Southern Ocean; surface property; thermocline; Atlantic Ocean; Atlantic Ocean (North); Pacific Ocean; Pacific Ocean (North); Southern Ocean
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250655
作者单位	School of Mathematics and Statistics, University of New South Wales, Sydney, NSW, Australia; Department of Geography, University of California, Santa Barbara, CA, United States; Earth Research Institute, University of California, Santa Barbara, CA, United States; LOCEAN Laboratory, Sorbonne Université-CNRS-IRD-MNHN, Paris, France
推荐引用方式 GB/T 7714	Holzer M.,DeVries T.,de Lavergne C.. Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning[J],2021,12(1).
APA	Holzer M.,DeVries T.,&de Lavergne C..(2021).Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning.Nature Communications,12(1).
MLA	Holzer M.,et al."Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning".Nature Communications 12.1(2021).