Lake-induced atmospheric circulations during BOREAS.

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TypeArticle
Journal titleJournal of Geophysical Research
Volume102
IssueD24
Pages29,15529,166; # of pages: 12
AbstractLake-induced atmospheric circulations over three lakes ranging from 3 to 10 km width are analyzed using data from three aircraft during the 1994 Boreal Ecosystem- Atmosphere Study (BOREAS). A well-defined divergent lake breeze circulation is observed over all three lakes during the day. Under light wind conditions, the lake breeze is not very sensitive to the water temperature, and the strength of the divergence over the lake decreasesw ith increasingl ake size. The boundary-layerd evelopmento ver the surrounding land can be very important for generating a horizontal pressure difference which drives the lake breeze. Diurnal and seasonal variations of lake breezes are investigated on the basis of repeated passes from the different aircraft at different altitudesf rom late spring to early fall of 1994. The lake breeze divergencei ncreasesw ith time during the day and reaches a maximum around 1300 LST. The latent heat flux over 10-km-wide Candle Lake increases steadily from spring to fall as the lake temperature increases. The latent heat flux over the land reaches a maximum during the summer due to evapotranspirationT.h e lake effect on area-averagedfl uxess ometimesle adst o a negative heat transfer coefficient for an averaging scale of several times the lake width.
LanguageEnglish
AffiliationNational Research Council Canada; NRC Industrial Research Assistance Program
Peer reviewedNo
NRC numberFRL-1997-0055
NPARC number8933246
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Record identifier54e178ac-0f4a-40a8-b6a7-a55ed1886434
Record created2009-04-23
Record modified2016-05-09
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