The Effect of the Vertical Source Distribution on Scalar Statistics within and above a Forest Canopy

Little is known about in-canopy processes that may alter forest–atmosphere exchanges of trace gases and aerosols. To improve our understanding of in-canopy mixing, we use large-eddy simulation to study the effect of scalar source/sink distributions on scalar concentration moments, fluxes, and correl...

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Bibliographic Details
Published in:Boundary-layer meteorology 2012-03, Vol.142 (3), p.365-382
Main Authors: Edburg, S. L., Stock, D., Lamb, B. K., Patton, E. G.
Format: Article
Language:English
Subjects:
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
Boundaries
Boundary layer
Canopies
Convection, turbulence, diffusion. Boundary layer structure and dynamics
Correlation coefficient
Correlation coefficients
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Exact sciences and technology
External geophysics
Fluxes
Forests
Grounds
Marine
Meteorology
Scalars
Segregations
Simulation
Statistics
Turbulence
VOCs
Volatile organic compounds
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Summary:Little is known about in-canopy processes that may alter forest–atmosphere exchanges of trace gases and aerosols. To improve our understanding of in-canopy mixing, we use large-eddy simulation to study the effect of scalar source/sink distributions on scalar concentration moments, fluxes, and correlation coefficients within and above an ideal forest canopy. Scalars are emitted from: (1) the ground, (2) the canopy, and (3) both the ground and the canopy; a scalar is also deposited onto the canopy. All scalar concentration moments, fluxes, and correlation coefficients are affected by the source location/distribution, as is the scalar segregation intensity. We conclude that vertical source/sink distribution has a profound impact on scalar concentration profiles, fluxes, correlation coefficient, and scalar segregation.
ISSN:0006-8314
1573-1472
DOI:10.1007/s10546-011-9686-1