Nonroad Mobile- For nonroad mobile sources, the emissions should be compiled as country,
state/tribe, county and SCC totals. For activities other than aircraft, locomotives, and marine,
inventory developers should use the most current version of EPA’s NONROAD model
(http://www.epa.gov/oms/nonrdmdl.htm) or alternative model. The California OFFROAD
model should be preferentially used for emissions in California, available at
http://www.arb.ca.gov/msei/msei.htm. Since the NONROAD model does not include emissions
of aircraft, locomotives, and commercial marine vessels, these emissions should be estimated
using other approaches described as follows:
Aircraft emissions should ideally be calculated based on airport-specific landing and
takeoff activity data and the Federal Aviation Administrations (FAA) Emissions Data
and Dispersion Model (EDMS), available at
Although aircraft emissions may be at the county and SCC level, point
(latitude/longitude) or shape file spatial resolution may be desirable (but possibly
more challenging to use in emissions models). County emissions of aircraft at airports
can be allocated to point locations using emissions modeling features, such as the
SMOKE area-to-point feature.
• Railroad emissions should ideally be calculated at the county and SCC level using
fuel usage activity data distributed among train types (e.g., long haul, yard,
passenger) and rail ton/miles data.
• Commercial marine vessel emissions should ideally be calculated at the county and
SCC level by fuel/cargo activity, or by growth from previously determined inventory
efforts. The emissions are distributed to ports and cargo lanes by activity data.
County emissions of port-based emissions can be allocated to point locations using
emissions modeling features, such as the SMOKE area-to-point feature.
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castellano: DISPER CUSTIC DESCAR RADIA italiano:
deutsch: DIS CUS DES RAD
castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD