气候变化领域集成服务门户(CCPortal): Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica

CCPortal

DOI	10.1029/2019JC015855
	Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica
	Hutchinson K.; Deshayes J.; Sallee J.-B.; Dowdeswell J.A.; de Lavergne C.; Ansorge I.; Luyt H.; Henry T.; Fawcett S.E.
发表日期	2020
ISSN	21699275
卷号	125 期号:4
英文摘要	The physical oceanographic environment, water mass characteristics, and distribution in the area adjacent to Larsen C Ice Shelf (LCIS) are investigated using hydrographic data collected during the 2019 Weddell Sea Expedition. The results shed light on the ocean conditions adjacent to a thinning LCIS, on a continental shelf that is a source region for Weddell Sea Deep Water (WSDW), a precursor of the globally important Antarctic Bottom Water. Modified Warm Deep Water (MWDW), a water mass of circumpolar origin, is identified on the continental shelf and is observed to mix with Ice Shelf Water (ISW) and High Salinity Shelf Water (HSSW), both source waters of WSDW. A source water type decomposition analysis reveals high levels of mixing in the area, with much spatial variability. Heat content anomalies indicate an introduction of heat, presumed to be associated with MWDW, into the area via Jason Trough. Furthermore, candidate parent sources for ISW are identified in the region, indicating the potential for a flow of continental shelf waters into the ice shelf cavity; however, the impact on LCIS cannot be surmised from the available observations. ISW and HSSW are observed to make dominant contributions to the densest layers within Jason Trough, where waters are likely en route to feed the deep layers of the Antarctic Slope Current. This cross-shelf flux of water masses links the region of the Weddell Sea adjacent to northern LCIS to global ocean circulation and Bottom Water characteristics via its contribution to ISW and HSSW, and hence WSDW properties. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	mixing; observations; Southern Ocean; transformation; water mass; Weddell Sea
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186931
作者单位	Oceanography Department, University of Cape Town, Rondebosch, South Africa; LOCEAN Laboratory, Sorbonne Université CNRS-IRD-MNHN, Paris, France; Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom; Nelson Mandela University, Port Elizabeth, South Africa
推荐引用方式 GB/T 7714	Hutchinson K.,Deshayes J.,Sallee J.-B.,et al. Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica[J],2020,125(4).
APA	Hutchinson K..,Deshayes J..,Sallee J.-B..,Dowdeswell J.A..,de Lavergne C..,...&Fawcett S.E..(2020).Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica.Journal of Geophysical Research: Oceans,125(4).
MLA	Hutchinson K.,et al."Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica".Journal of Geophysical Research: Oceans 125.4(2020).