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Analysis of the boundary layer development above boreal forests through models and observation data
Wenge Ni-Meister, Hunter College, New York, NY; and J. Dong
Analyses of serial upper air sounding data and tower flux data measured during Boreal Ecosystem-Atmosphere Study (BOREAS) field campaigns indicate that there is a linear relation between the boundary layer (BL) development and the sensible heat forcing in nearly every day above boreal forests. The regression slopes on the relationship between the BL development and surface fluxes respond to the influences by the surroundings. The transilient turbulence theory (TTT) model is applied in simulating the diurnal BL development at Candle Lake and Thompson release sites over boreal forests. The importance of both initial patterns and surface fluxes are estimated in controlling the modeling processes. The lake effects are emphasized in constructing the surface fluxes at Candle Lake release site. Comparison of the model results and field measurements on the BL profiles indicates that the TTT model has better performance in simulating the BL development above boreal forests for clear days, rainfall days and cloudy days. .
Session 6, Regional land/atmosphere interactions (parallel with session 5)
Wednesday, 25 August 2004, 8:30 AM-11:30 AM
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