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Table 1

Retention parameters for roadsa in ERMIN.

ERMIN model version A1a T1 A2 T2
ERMIN 2 0.7 0.4 years 0.3 3 years
ERMIN 2.1     Soluble aerosols 0.7 0.4 years 0.3 3 years
Fuel particles 2–5 μm 1 60 days
Fuel particles 5–10 μm 1 30 days
Fuel particles 10–20 μm 1 30 days

ERMIN uses a double exponential for retention on roads, where A1 and A2 are the fractions of material in the first and second compartments and T1 and T2 are the retention half-lives.

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