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USER'S GUIDE TO THE PERSONAL COMPUTER VERSION OF THE BIOGENIC EMISSIONS INVENTORY SYSTEM (PC-BEIS2)
Citation:
Birth, T. USER'S GUIDE TO THE PERSONAL COMPUTER VERSION OF THE BIOGENIC EMISSIONS INVENTORY SYSTEM (PC-BEIS2). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-95/091 (NTIS PB95-243184), 1995.
Impact/Purpose:
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Description:
The document is a user's guide for an updated Personal Computer version of the Biogenic Emissions Inventory System (PC-BEIS2), allowing users to estimate hourly emissions of biogenic volatile organic compounds (BVOCs) and soil nitrogen oxide emissions for any county in the contiguous Unites States. PC-BEIS2 was compiled using Microsoft FORTRAN and tested on IBM compatible PCs. The source code is written in ANSI FORTRAN 77 and should be transportable to most other computers. Emission rates depend on land use, emission factors, temperature, and solar radiation. A simple canopy model is used to adjust photosynthetically active solar radiation at five vertical levels in forest canopies. Leaf temperature and photosynthetically active solar radiation derived from ambient conditions above the forest canopy are then used to drive empirical equations to estimate genus level emission rates of BVOCs vertically through canopies. Emission rates from vegetation other than forests are expressed as BVOC carbon mass per unit land area, with a constant peak growing season biomass assumed. Light and temperature correction are applied, but no canopy model is used for non-forested areas.