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

页数：6

共 46 条

[1]

[Anonymous], LAKE ERIE LAKE STCLA

[2] Mean circulation in the Great Lakes [J].

Beletsky, D ;

Saylor, JH ;

Schwab, DJ .

JOURNAL OF GREAT LAKES RESEARCH, 1999, 25 (01) :78-93

[3] Modeling the 1998-2003 summer circulation and thermal structure in Lake Michigan [J].

Beletsky, Dmitry ;

Schwab, David ;

McCormick, Michael .

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2006, 111 (C10)

[4] Climatological circulation in Lake Michigan [J].

Beletsky, Dmitry ;

Schwab, David .

GEOPHYSICAL RESEARCH LETTERS, 2008, 35 (21)

[5]

BENNETT JR, 1974, J PHYS OCEANOGR, V4, P400, DOI 10.1175/1520-0485(1974)004<0400:OTDOWD>2.0.CO

[6]

[7] HORIZONTAL TRANSPORT IN A ROTATING BASIN OF PARABOLIC DEPTH PROFILE [J].

BIRCHFIE.GE .

JOURNAL OF GEOPHYSICAL RESEARCH, 1967, 72 (24) :6155-+

[8] THERMAL STRUCTURE AND CIRCULATION IN THE GREAT-LAKES [J].

BOYCE, FM ;

DONELAN, MA ;

HAMBLIN, PF ;

MURTHY, CR ;

SIMONS, TJ .

ATMOSPHERE-OCEAN, 1989, 27 (04) :607-642

[9] Trends in temperature, Secchi depth, and dissolved oxygen depletion rates in the central basin of Lake Erie, 1983-2002 [J].

Burns, Noel M. ;

Rockwell, David C. ;

Bertram, Paul E. ;

Dolan, David M. ;

Ciborowski, Jan J. H. .

JOURNAL OF GREAT LAKES RESEARCH, 2005, 31 :35-49

[10]

Church P. E., 1945, ANN TEMPERATURE CYCL, V18

← 1 2 3 4 5 →