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Titolo:
Modeling circulation and thermal structure in Lake Michigan: Annual cycle and interannual variability
Autore:
Beletsky, D; Schwab, DJ;
Indirizzi:
NOAA, Great Lakes Environm Res Lab, Ann Arbor, MI 48105 USA NOAA Ann Arbor MI USA 48105 kes Environm Res Lab, Ann Arbor, MI 48105 USA Univ Michigan, Dept Naval Architecture & Marine Engn, Ann Arbor, MI 48109 USA Univ Michigan Ann Arbor MI USA 48109 Marine Engn, Ann Arbor, MI 48109 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
fascicolo: C9, volume: 106, anno: 2001,
pagine: 19745 - 19771
SICI:
0148-0227(20010915)106:C9<19745:MCATSI>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
GREAT-LAKES; NUMERICAL-MODELS; MIXED-LAYER; ICE CONDITIONS; OCEAN MODEL; SIMULATION; TEMPERATURE; SEA; VERIFICATION; WEATHER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
59
Recensione:
Indirizzi per estratti:
Indirizzo: Beletsky, D NOAA, Great Lakes Environm Res Lab, 2205 Commonwealth Blvd, Ann Arbor, MI 48105 USA NOAA 2205 Commonwealth Blvd Ann Arbor MI USA 48105 I 48105 USA
Citazione:
D. Beletsky e D.J. Schwab, "Modeling circulation and thermal structure in Lake Michigan: Annual cycle and interannual variability", J GEO RES-O, 106(C9), 2001, pp. 19745-19771

Abstract

A three-dimensional primitive equation numerical model was applied to LakeMichigan for the periods 1982-1983 and 1994-1995 to study seasonal and interannual variability of lake-wide circulation and thermal structure in the lake. The model was able to reproduce all of the basic features of the thermal structure in Lake Michigan: spring thermal bar, full stratification, deepening of the thermocline during the fall cooling, and finally, an overturn in the late fall. Large-scale circulation patterns tend to be cyclonic (counterclockwise), with cyclonic circulation within each subbasin. The largest currents and maximum cyclonic vorticity occur in the fall and winter when temperature gradients are low but wind stresses are strongest. The smallest currents and minimum cyclonic vorticity occur in spring and summer when temperature gradients are strong but wind stresses are weakest. All these facts are in agreement with observations. The main shortcoming of the model was that it tended to predict a more diffuse thermocline than was indicatedby observations and explained only up to half of the variance observed in horizontal currents at timescales shorter than a day.

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Documento generato il 03/04/20 alle ore 07:56:49