Table 1.
Listing of sources and hydrocarbons tracked. Sources include all hydrocarbon or NOx emissions in each category; hydrocarbons tracked includes emissions combined across source categories.
| Source categories trackeda | Hydrocarbons trackedb |
|---|---|
| Mobile sources (onroad, nonroad, marine, rail) |
Alkanes: lumped singly-bonded carbons (model species PAR) and explicit ethane (ETHA) |
| Oil and gas (point and non-point) | Alcohols: methanol (model species MEOH) and ethanol (ETOH) |
| EGU and other point sources | Formaldehyde (model species FORM) |
| Fires (wild, prescribed and agricultural) |
Aldehydes with 2 or more carbons: Acetaldehyde (model species ALD2) and lumped aldehydes with more than 2 carbons (ALDX) |
| Residential wood combustion |
Alkenes: ethene (model species ETHE), lumped terminal carbon- carbon double bonds (OLE) and lumped internal carbon-carbon double bonds (IOLE) |
| Total Biogenic hydrocarbons, total biogenic NOx |
Isoprene (model species ISOP) |
| Boundary conditions | Monoterpenes: lumped terpenes (model species TERP) |
|
Aromatics: toluene and other monoalkyl aromatics (model species TOL) and xylene and polyalkyl aromatics (XYL) | |
| Methane (from constant background) |
a
Each source category was tracked separately for NOx (sum of NO, NO2; here we also add HONO when it is assumed to be a portion of NOx emissions) and hydrocarbons (sum of model species PAR, ETHA, MEOH, ETOH, FORM, ALD2, ALDX, ETHE, OLE, IOLE, ISOP, TERP, TOL and XYL)
b
Sum of each model specie emissions were tracked separately for sum of all anthropogenic sources and sum of all biogenic sources.