Each SMOKE processing category is defined by its source characteristics, which correspond to the identifiers used in creating the emission inventory (e.g., state/county FIPS code and SCC). The processing categories also have source attributes, which are the other useful data in the emission inventories that SMOKE uses; examples are point-source flue gas exit height and temperature. Source characteristics define the sources as area, biogenic, mobile, or point sources and also distinguish one source in the inventory from another. Source attributes are additional data about the source that do not contribute to the source’s uniqueness in SMOKE. We have previously described in Section 2.2.1, “Inventory data types” the data types and the data attributes that are contained in the inventories that SMOKE uses. In the subsections below, we summarize the source characteristics of area, biogenics, mobile, and point sources. Please refer to Table 2.1, “Inventory source categories and SMOKE processing capabilities and categories” for more information about how SMOKE processing categories map to the inventory source categories.
In SMOKE, each processing category is defined by source characteristics as follows:
Area sources are defined by (1) country, state, and county codes, (2) SCCs, and (3) optionally, grid cell.
Biogenic sources are defined differently depending on the type of processing you are using. They can be defined either by (1) country, state, and county codes and (2) land use code, or by (1) grid cell and (2) land use code.
Mobile sources are defined by (1) country, state, and county codes, (2) SCCs, and (3) optionally link codes.
Point sources are defined by (1) country, state, and county codes, (2) plant/facility codes, and (3) characteristics 1 through 5, one of which must be the SCC.