A Boundary Layer Parameterization for a General Model.
Abstract
A two-layer model of soil hydrology is developed from the basic soil moisture transport equations. The thin upper layer responds to short term evaporation. A thick lower layer includes the root zone and longer term water storage. The model is tested against a high-resolution soil hydrology model. Simple transpiration and canopy interception models are also included in the surface water budget. A surface energy balance is employed. Fluxes from the surface to the atmosphere are formulated with a stability-dependent bulk aerodynamic relationship and a stability dependent Penman relationship. The latter is evaluated with the Wangara data set. The model of the atmospheric boundary layer uses a stability-dependent, height dependent eddy diffusivity which provides for countergradient convective transport. Boundary layer growth is modelled with a bulk Richardson number which is generalized to include purely convective boundary layer growth. The model development emphasizes self-consistency and reduction of the number of velocity scales compared to previous models of this type.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1984
- Accession Number
- ADA144224
Entities
People
- Hsi-An Pan
- I. Troen
- J. Paumier
- L. Mahrt
Organizations
- Oregon State University