Comparison of two-layer and single-layer canopy models with Lagrangian and K-theory approaches in modelling evaporation from forests
✍ Scribed by A. Wu; A. Black; D.L. Verseghy; W.G. Bailey
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 261 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0899-8418
- DOI
- 10.1002/joc.652
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✦ Synopsis
Abstract
The near‐field effect on flux calculation was examined using two approaches: (1) The performance of a Lagrangian two‐layer canopy model was compared with a K‐theory two‐layer canopy model and a K‐theory single‐layer canopy model; and (2) the near‐field resistance was placed in series with aerodynamic resistance in the Canadian Land Surface Scheme (CLASS). The first approach was tested using flux data measured from a boreal aspen forest because it had a thick understorey canopy. The second approach was tested using the aspen forest and a Douglas fir forest. Results from both approaches confirmed that the difference between simulations from K‐theory and the Lagrangian evaporation models was small due to the strong control by stomatal conductance. Furthermore, the two‐layer canopy models were inferior to the single canopy model in the calculation of the sensible and latent heat fluxes above the forest. Copyright © 2001 Royal Meteorological Society