Table 3.
Tropospheric Annual Average Mixing Ratios, Percentage of All‐Mode Total Mixing Ratio, and Production/Loss for NO 3 , Cl, NH 4 , and Non‐Sea‐Salt SO 4 in the MAM7 Aerosol Modes
| Mode | Mixing ratio (ng kg−1) | Percentage of total mixing ratio | Condensation production (ng kg−1 day−1) | Evaporation loss (ng kg−1 day−1) | Net aqueous production (ng kg−1 day−1) | Overall net production (ng kg−1 day−1) |
|---|---|---|---|---|---|---|
| NO3 | ||||||
| Accumulation | 11.9 | 8.6 | 11.2 | −53.5 | 49.7 | 7.4 |
| Aitken | 0.8 | 0.6 | 1.9 | −2.9 | 3.2 | 2.2 |
| F. sea salt | 33.0 | 23.8 | 16.3 | −7.6 | 0.2 | 8.9 |
| C. sea salt | 68.9 | 49.8 | 38.4 | −2.1 | 0.0 | 36.3 |
| Fine dust | 16.7 | 12.0 | 2.9 | −0.6 | 0.4 | 2.7 |
| Coarse dust | 7.2 | 5.2 | 2.3 | −0.0 | 0.0 | 2.3 |
| All | 138.5 | 100.0 | 73.0 | −66.8 | 53.7 | 59.9 |
| Cl | ||||||
| Accumulation | 4.5 | 0.6 | 2.2 | −23.8 | 19.0 | −2.6 |
| Aitken | 0.3 | 0.0 | 0.9 | −1.8 | 1.7 | 0.7 |
| F. sea salt | 54.8 | 7.4 | 4.0 | −9.0 | 0.8 | −4.2 |
| C. sea salt | 678.4 | 91.0 | 5.7 | −25.1 | 0.2 | −19.2 |
| Fine dust | 5.1 | 0.7 | 1.1 | −0.4 | 0.2 | 0.9 |
| Coarse dust | 2.6 | 0.4 | 0.9 | −0.0 | 0.0 | 0.9 |
| All | 745.8 | 100.0 | 14.9 | −60.1 | 21.8 | −23.4 |
| NH4 | ||||||
| Accumulation | 58.9 | 89.2 | 19.5 | −11.8 | 2.1 | 9.9 |
| Aitken | 4.6 | 7.0 | 4.3 | −2.4 | 0.1 | 2.1 |
| F. sea salt | 1.9 | 2.8 | 2.2 | −1.5 | 0.0 | 0.7 |
| C. sea salt | 0.6 | 1.0 | 2.1 | −1.4 | −0.0 | 0.7 |
| Fine dust | 0.0 | 0.0 | 0.1 | −0.1 | 0.1 | 0.0 |
| Coarse dust | 0.0 | 0.0 | 0.0 | −0.0 | 0.0 | 0.0 |
| All | 66.0 | 100.0 | 28.2 | −17.1 | 2.3 | 13.3 |
| Non‐sea‐salt SO4 | ||||||
| Accumulation | 273.6 | 86.9 | 14.2 | 0.0 | 42.4 | 56.6 |
| Aitken | 23.6 | 7.5 | 7.6 | 0.0 | 4.0 | 11.6 |
| F. sea salt | 2.5 | 0.8 | 0.4 | 0.0 | 0.8 | 1.1 |
| C. sea salt | 0.5 | 0.2 | 0.3 | 0.0 | 0.2 | 0.5 |
| Fine dust | 12.9 | 4.1 | 1.6 | 0.0 | 0.7 | 2.2 |
| Coarse dust | 1.8 | 0.6 | 0.5 | 0.0 | 0.0 | 0.5 |
| All | 314.9 | 100.0 | 24.6 | 0.0 | 48.1 | 72.7 |
Note. The production/loss columns are gas condensation (HNO3, HCl, NH3, and H2SO4) to interstitial aerosol particles, loss by evaporation from interstitial particles, and net aqueous production (net uptake of these gases to cloud‐droplet‐borne aerosol particles, plus uptake and aqueous oxidation of SO2), and overall net production. Losses from cloud‐droplet‐borne particles are relatively small so are not shown. Single time step production/loss values from the aerosol and aqueous chemistry modules are saved separately to produce these results. Average mixing ratios of HNO3, HCl, NH3, SO2, and H2SO4 gases are 219, 71.1, 19.6, 161, and 0.26 ng kg−1.