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RECORD NUMBER: 31 OF 105

OLS Field Name OLS Field Data
Main Title Evaluation of Forest Canopy Models for Estimating Isoprene Emissions.
Author Lamb, B. ; Allwine, E. ; Dilts, S. ; Westberg, H. ; Pierce, T. ;
CORP Author Washington State Univ., Pullman. Dept. of Civil and Environmental Engineering. ;National Oceanic and Atmospheric Administration, Oak Ridge, TN. Atmospheric Turbulence and Diffusion Div. ;National Center for Atmospheric Research, Boulder, CO.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher 1996
Year Published 1996
Report Number EPA/600/A-96/105;
Stock Number PB97-123111
Additional Subjects Natural emissions ; Air pollution sources ; Photosynthesis ; Isoprene ; Hydrocarbons ; Biomass ; Canopies(Vegetation) ; Leaves(Botany) ; Deciduous trees ; Solar radiation ; Respiration ; Transpiration ; Monitoring ; Estimating ; Air-biosphere interactions ; Uncertainty ; Mathematical models ; Biogenic emissions
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NTIS  PB97-123111 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 02/22/1997
Collation 12p
Abstract
The paper gives results of an evaluation of forest canopy models for estimating isoprene emissions. Three approaches are compared for determining the leaf microclimate as input to biogenic emission inventory systems: (1) no-canopy effects, (2) a simple scaling model based on empirical vertical scaling relationships and a leaf energy balance, and (3) a numerical canopy model that explicitly accounts for leaf-sun geometries, photosynthesis, respiration, and transpiration. Model-to-model comparisons and sensitivity analyses are presented to highlight the uncertainties involved in modeling leaf-level biogenic hydrocarbon emissions. A preliminary evaluation of these models is also presented based on measured isoprene fluxes from a southeastern deciduous forest.