气候变化领域集成服务门户(CCPortal): Mooring observations of air-sea heat fluxes in two subantarctic mode water formation regions

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DOI	10.1175/JCLI-D-19-0653.1
	Mooring observations of air-sea heat fluxes in two subantarctic mode water formation regions
	Tamsitt V.; Cerovecki I.; Josey S.A.; Gille S.T.; Schulz E.
发表日期	2020
ISSN	0894-8755
起始页码	2757
结束页码	2777
卷号	33 期号:7
英文摘要	Wintertime surface ocean heat loss is the key process driving the formation of Subantarctic Mode Water (SAMW), but there are few direct observations of heat fluxes, particularly during winter. The Ocean Observatories Initiative (OOI) Southern Ocean mooring in the southeast Pacific Ocean and the Southern Ocean Flux Station (SOFS) in the southeast Indian Ocean provide the first concurrent, multiyear time series of air-sea fluxes in the Southern Ocean from two key SAMW formation regions. In this work we compare drivers of wintertime heat loss and SAMW formation by comparing air-sea fluxes and mixed layers at these two mooring locations. A gridded Argo product and the ERA5 reanalysis product provide temporal and spatial context for the mooring observations. Turbulent ocean heat loss is on average 1.5 times larger in the southeast Indian (SOFS) than in the southeast Pacific (OOI), with stronger extreme heat flux events in the southeast Indian leading to larger cumulative winter ocean heat loss. Turbulent heat loss events in the southeast Indian (SOFS) occur in two atmospheric regimes (cold air from the south or dry air circulating via the north), while heat loss events in the southeast Pacific (OOI) occur in a single atmospheric regime (cold air from the south). On interannual time scales, wintertime anomalies in net heat flux and mixed layer depth (MLD) are often correlated at the two sites, particularly when wintertime MLDs are anomalously deep. This relationship is part of a larger basin-scale zonal dipole in heat flux and MLD anomalies present in both the Indian and Pacific basins, associated with anomalous meridional atmospheric circulation. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Air; Atmospheric thermodynamics; Heat losses; Mooring; Oceanography; Air-sea heat flux; Atmospheric circulation; Direct observations; Interannual time scale; Mixed layer depths; Ocean observatories initiatives; Subantarctic mode water; Temporal and spatial; Heat flux; air-sea interaction; heat flux; meridional circulation; mooring system; spatiotemporal analysis; subantarctic region; winter; Indian Ocean; Indian Ocean (Southeast); Pacific Ocean; Pacific Ocean (Southeast); Southern Ocean
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171370
作者单位	Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia; Centre for Southern Hemisphere Oceans Research, CSIRO Oceans and Atmosphere, Hobart, TAS, Australia; Scripps Institution of Oceanography, San Diego, CA, United States; National Oceanography Centre, Southampton, United Kingdom; Bureau of Meteorology, Melbourne, VIC, Australia
推荐引用方式 GB/T 7714	Tamsitt V.,Cerovecki I.,Josey S.A.,et al. Mooring observations of air-sea heat fluxes in two subantarctic mode water formation regions[J],2020,33(7).
APA	Tamsitt V.,Cerovecki I.,Josey S.A.,Gille S.T.,&Schulz E..(2020).Mooring observations of air-sea heat fluxes in two subantarctic mode water formation regions.Journal of Climate,33(7).
MLA	Tamsitt V.,et al."Mooring observations of air-sea heat fluxes in two subantarctic mode water formation regions".Journal of Climate 33.7(2020).