Table 9.
Examples of aerosol size distributions available within CMAQ
| Distribution reference | Weight fraction | Diametera | Standard deviation | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Aitken | Acc.b | Coarse | Aitken | Acc. | Coarse | Aitken | Acc. | Coarse | |
| FINE_REF | 0.1 | 0.9 | 0.0 | 60 | 280 | –c | 1.7 | 1.7 | – |
| COARSE_REF | 0.0 | 0.0 | 1.0 | – | – | 6000 | 1.7 | 1.7 | 2.2 |
| AIR_FINE | 1.0 | 0.0 | 0.0 | 30 | – | – | 1.3 | – | – |
| AIR_COARSE | 0.0 | 0.0 | 1.0 | – | – | 5000 | – | – | 2.1 |
| FIRE_FINE | 1.0 | 0.0 | 0.0 | 130 | – | – | 1.7 | – | – |
| FIRE_COARSE | 0.0 | 0.0 | 1.0 | – | – | 7000 | – | – | 1.8 |
a
Geometric mean diameter of the aerosol volume distribution.
b
Designates the particle accumulation mode.
c
Parameters omitted for the purpose of this table when the weight fraction is 0.0.