气候变化领域集成服务门户(CCPortal): Spatial and Temporal Patterns of Southern Ocean Ventilation

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DOI	10.1029/2023GL106716
	Spatial and Temporal Patterns of Southern Ocean Ventilation
	Styles, Andrew F.; Macgilchrist, Graeme A.; Bell, Michael J.; Marshall, David P.
发表日期	2024
ISSN	0094-8276
EISSN	1944-8007
起始页码	51
结束页码	4
卷号	51 期号:4
英文摘要	Ocean ventilation translates atmospheric forcing into the ocean interior. The Southern Ocean is an important ventilation site for heat and carbon and is likely to influence the outcome of anthropogenic climate change. We conduct an extensive backwards-in-time trajectory experiment to identify spatial and temporal patterns of ventilation. Temporally, almost all ventilation occurs between August and November. Spatially, hotspots of ventilation account for 60% of open-ocean ventilation on a 30 years timescale; the remaining 40% ventilates in a circumpolar pattern. The densest waters ventilate on the Antarctic shelf, primarily near the Antarctic Peninsula (40%) and the west Ross sea (20%); the remaining 40% is distributed across East Antarctica. Shelf-ventilated waters experience significant densification outside of the mixed layer. Only a small fraction of the ocean is interacting with the atmosphere at any given time. This water is definitively found in the upper mixing layer of the ocean. When this water leaves the mixing layer and enters the ocean interior, it has ventilated (this term arising from the abundance of oxygen in newly ventilated water). The Southern Ocean is an important region for ventilation, and the uptake of heat and carbon dioxide there is likely to influence the limits and timescales of climate change. By calculating the 30 year history of over 480 million fluid parcels, we find that 60% of open-ocean ventilation occurs in certain hotspots and almost exclusively between August and November. Extensive backwards-in-time trajectories are used to explore the 30 year history of ventilation in a simulated Southern Ocean Local hotspots only account for a fraction of Southern Ocean ventilation (60%), the remaining ventilation occurs in a circumpolar pattern Almost all Southern Ocean ventilation occurs between August and November while the mixed layer is shoaling
英文关键词	southern ocean; ventilation; trajectories; hotspots; Stommel's demon
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001160515000001
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/290303
作者单位	University of Oxford; Princeton University; National Oceanic Atmospheric Admin (NOAA) - USA; Met Office - UK
推荐引用方式 GB/T 7714	Styles, Andrew F.,Macgilchrist, Graeme A.,Bell, Michael J.,et al. Spatial and Temporal Patterns of Southern Ocean Ventilation[J],2024,51(4).
APA	Styles, Andrew F.,Macgilchrist, Graeme A.,Bell, Michael J.,&Marshall, David P..(2024).Spatial and Temporal Patterns of Southern Ocean Ventilation.GEOPHYSICAL RESEARCH LETTERS,51(4).
MLA	Styles, Andrew F.,et al."Spatial and Temporal Patterns of Southern Ocean Ventilation".GEOPHYSICAL RESEARCH LETTERS 51.4(2024).