气候变化领域集成服务门户(CCPortal): The Shelf Circulation of the Bellingshausen Sea

CCPortal

DOI	10.1029/2020JC016871
	The Shelf Circulation of the Bellingshausen Sea
	Schulze Chretien L.M.; Thompson A.F.; Flexas M.M.; Speer K.; Swaim N.; Oelerich R.; Ruan X.; Schubert R.; LoBuglio C.
发表日期	2021
ISSN	21699275
卷号	126 期号:5
英文摘要	Over recent decades, the West Antarctic Ice Sheet has experienced rapid thinning of its floating ice shelves as well as grounding line retreat across its marine-terminating glaciers. The transport of warm Modified Circumpolar Deep Water (MCDW) onto the continental shelf, extensively documented along the West Antarctic Peninsula (WAP), and in the Amundsen Sea, has been identified as the key process for inducing these changes. The Bellingshausen Sea sits between the Amundsen Sea and the northern part of the WAP, but its oceanic properties remain remarkably under-studied compared to surrounding regions. Here, we present observations collected from a hydrographic survey of the Bellingshausen Sea continental shelf in austral summer 2019. Using a combination of ship-based and glider-based CTD and lowered ADCP observations, we show that submarine troughs provide topographically steered pathways for MCDW from the shelf break toward deep embayments and ultimately under floating ice shelves. Warm MCDW enters the continental shelf at the deepest part of the Belgica Trough and flows onshore along the eastern side of the trough. Modification of these shoreward-flowing waters by glacial melt is estimated by calculating meltwater fractions using an optimal multiparameter analysis. Meltwater is found to be elevated at the western edge of both the Latady and Belgica troughs. Meltwater distributions, consistent with other diagnostics, suggest a recirculation in each trough with modified waters eventually flowing westward upon leaving the Belgica Trough. Our results show that the Bellingshausen Sea is a critical part of the larger West Antarctic circulation system, linking the WAP and the Amundsen Sea. © 2021. American Geophysical Union. All Rights Reserved.
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/186315
作者单位	Department of Biology and Marine Science, Marine Science Research Institute, Jacksonville University, Jacksonville, FL, United States; Environmental Science and Engineering, California Institute of Technology, Pasadena, CA, United States; Department of Scientific Computing, Geophysical Fluid Dynamics Institute, Florida State University, Tallahassee, FL, United States; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom
推荐引用方式 GB/T 7714	Schulze Chretien L.M.,Thompson A.F.,Flexas M.M.,et al. The Shelf Circulation of the Bellingshausen Sea[J],2021,126(5).
APA	Schulze Chretien L.M..,Thompson A.F..,Flexas M.M..,Speer K..,Swaim N..,...&LoBuglio C..(2021).The Shelf Circulation of the Bellingshausen Sea.Journal of Geophysical Research: Oceans,126(5).
MLA	Schulze Chretien L.M.,et al."The Shelf Circulation of the Bellingshausen Sea".Journal of Geophysical Research: Oceans 126.5(2021).