气候变化领域集成服务门户(CCPortal): Spatially Coherent Intraseasonal Velocity Fluctuations on the Western Antarctic Peninsula Shelf

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DOI	10.1029/2019JC015770
	Spatially Coherent Intraseasonal Velocity Fluctuations on the Western Antarctic Peninsula Shelf
	McKee D.C.; Martinson D.G.
发表日期	2020
ISSN	21699275
卷号	125 期号:5
英文摘要	We analyze several year-long moored current meter records collected on the midshelf and shelf break of the western Antarctic Peninsula in order to describe the major features of the intraseasonal circulation. An empirical orthogonal function (EOF) analysis of all current meter records in any given year reveals that over 49% of the circulation variance follows a spatially coherent, nearly depth-invariant anticyclonic cell in the downstream vicinity of Marguerite Trough, qualitatively consistent with flow-topography interaction with the canyon. An analysis of kinetic energy spectra supports the interpretation that the shelf break current is diverted shoreward at the location of the canyon and generates substantial counterclockwise energy at periods shorter than ~10 days as the flow is compressed by a downstream bank. The circulation is well correlated with the long-shore wind stress both local and remote. Composite velocity profiles under upwelling and downwelling winds show that the change in the barotropic current under different wind states is comparable to or larger than the shear of the mean profile in all years. The barotropic velocity fluctuations are generally not coherent with subpycnocline heat content. ©2020. 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/186894
作者单位	Division of Ocean and Climate Physics, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Now at Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States
推荐引用方式 GB/T 7714	McKee D.C.,Martinson D.G.. Spatially Coherent Intraseasonal Velocity Fluctuations on the Western Antarctic Peninsula Shelf[J],2020,125(5).
APA	McKee D.C.,&Martinson D.G..(2020).Spatially Coherent Intraseasonal Velocity Fluctuations on the Western Antarctic Peninsula Shelf.Journal of Geophysical Research: Oceans,125(5).
MLA	McKee D.C.,et al."Spatially Coherent Intraseasonal Velocity Fluctuations on the Western Antarctic Peninsula Shelf".Journal of Geophysical Research: Oceans 125.5(2020).