Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 365-382 |
| Number of pages | 18 |
| Journal | Boundary-Layer Meteorology |
| Volume | 142 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2012 |
Keywords
- Biogenic volatile organic compounds
- Dispersion
- Forest canopy
- Large-eddy simulation
- Scalar transport
- Turbulence
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