Processing categories: biogenic

Rawbio reads the county-level biomass/land use or gridded land use, the emissions factors (winter or summer table), and (optionally) gridding surrogate factors, and produces gridded normalized biogenic emissions. Rawbio is the first program in the SMOKE-BEIS2 model, while Normbeis3 is the corresponding program in SMOKE-BEIS3. When the land use data is available only at the county level, the surrogate factors are used to produce gridded land use data. You can assign a surrogate code to be used for each of the following land coverage categories, using environment variables:

The default surrogate code for all of these land coverage categories is 60, which is the EPA Models-3 area surrogate code. If surrogate data exist for these specific land coverage categories, better results may be achieved by careful choice of surrogate mapping.

Gridded land use can be created using GIS software (such as ArcInfo) by someone with expertise in generating gridding surrogates. The Beld3to2 utility can create gridded land use from BELD3 data (see Section 5.3.3, “Beld3to2”).