Accession Number:

ADA109436

Title:

Thermal Vegetation Canopy Model Studies

Descriptive Note:

Journal article

Corporate Author:

COLORADO STATE UNIV FORT COLLINS COLL OF FORESTRY AND NATURAL RESOURCES

Report Date:

1981-01-01

Pagination or Media Count:

17.0

Abstract:

An iterative-type thermal model applicable to forest canopies was tested with data from two diverse forest types. The model framework consists of a system of steady-state energy budget equations describing the interactions of short- and long-wave radiation within three horizontally infinite canopy layers. A state-space formulation of the energy dynamics within the canopy is used which permits a factorization of canopy geometrical parameters from canopy optical and thermal coefficients as well as environmental driving variables. Two sets of data characterizing a coniferous Douglas-fir and deciduous oak-hickory canopy were collected to evaluate the thermal model. The results show that the model approximates measured mean canopy temepatures to within 2 deg C for relatively clear weather conditions and deviates by a maximum of 3 deg C for very hazy or foggy conditions.

Subject Categories:

  • Forestry
  • Biology
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE