Summer thermal structure and anticyclonic circulation of Lake Erie

被引：46

作者：

Beletsky, Dmitry ^{[1
]}

Hawley, Nathan ^{[2
]}

Rao, Yerubandi R. ^{[3
]}

Vanderploeg, Henry A. ^{[2
]}

Beletsky, Raisa ^{[1
]}

Schwab, David J. ^{[2
]}

Ruberg, Steven A. ^{[2
]}

机构：

[1] Univ Michigan, Sch Nat Resources & Environm, CILER, Ann Arbor, MI 48108 USA

[2] NOAA, Great Lakes Environm Res Lab, Ann Arbor, MI 48108 USA

[3] Environm Canada, Natl Water Res Inst, Burlington, ON L7R 4A6, Canada

来源：

GEOPHYSICAL RESEARCH LETTERS | 2012年 / 39卷

关键词：

GREAT-LAKES; MEAN CIRCULATION; ROTATING FLUID; CENTRAL BASIN; WIND; CURRENTS; MOTIONS; STRATIFICATION; GENERATION; TOPOGRAPHY;

D O I：

10.1029/2012GL051002

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

In most thermally stratified lakes, the summer thermocline has the shape of a "dome", with a shallower depth offshore than nearshore. This configuration is accompanied by a lake-wide cyclonic circulation. Lake-wide observations of subsurface temperature in central Lake Erie revealed an atypical "depressed" or "bowl-shaped" thermocline in late summer, with a deeper thermocline in the middle of the lake and a shallower thermocline nearshore. Currents measured in the central basin when the bowl-shaped thermocline was observed were anticyclonic, forming a single basin-wide gyre. It is suggested that the unusual bowl-shaped thermocline is the result of Ekman pumping driven by anticyclonic vorticity in surface winds. The bowl-shaped thermocline can lead to greater hypoxia in bottom waters and negative effects on biota by reducing the hypolimnetic volume. Citation: Beletsky, D., N. Hawley, Y. R. Rao, H. A. Vanderploeg, R. Beletsky, D. J. Schwab, and S. A. Ruberg (2012), Summer thermal structure and anticyclonic circulation of Lake Erie, Geophys. Res. Lett., 39, L06605, doi:10.1029/2012GL051002.

引用

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