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Conceptual aspects of a statistical-dynamical approach to represent landscape subgrid-scale heterogeneities in atmospheric modelsA parameterization of land surfaces based on a statistical-dynamical approach is presented. With this approach, the most important characteristics of the soil-plant-atmosphere system that affect the partition of energy (e.g., plant stomatal conductance, soil humidity, and surface roughness) are represented by a pdf rather than by a single 'representative' value. A primary simplified version of this parameterization is used to estimate the land-surface energy fluxes that are produced at the grid scale by various distributions of stomatal conductance under a broad range of environmental conditions. To demonstrate the approach's potential, results are compared with the same fluxes calculated with a big leaf model using the mean stomatal conductance that corresponds to the distributions. Large absolute and relative differences are obtained between the two schemes for many combinations of stomatal conductance pdfs and environmental conditions.
Document ID
19920045132
Document Type
Reprint (Version printed in journal)
Authors
Avissar, Roni
(Rutgers University New Brunswick, NJ, United States)
Date Acquired
August 15, 2013
Publication Date
February 28, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: D3 F
ISSN: 0148-0227
Subject Category
Meteorology And Climatology
Funding Number(s)
CONTRACT_GRANT: NSF ATM-90-16562
CONTRACT_GRANT: NSF EAR-91-05059
Distribution Limits
Public
Copyright
Other

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