Research Article
Examining the Impact of Nitrous Acid Chemistry on Ozone and PM over the Pearl River Delta Region
Table 1
Design of CMAQ simulation case to evaluate the HONO chemistry.
| | Case ID | Description | Purpose |
| | CB05 | Base case run | Relative importance of four different formation pathways to simulated HONO | | CB05+EM | CB05+HONO emission | | CB05+EM+HT | CB05+EM+HONO heterogeneous reaction (, ) | | CB05+EM+HT+SP | CB05+EM+HT+HONO surface photolysis (, ) |
| | HONO_S/V | CB05+EM+HT+SP with
in building surface area estimation and soil surface 0.2 | Sensitivity study of the uncertainties for selected parameters in HONO formation mechanism | | HONO_NOx | CB05+EM+HT+SP with emission partition NO/NO2/HONO 85%/13.8%/1.2% | | HONO_DV | CB05+EM+HT+SP with deposition velocity of HONO has taken the value as NO2 |
| | HONO_G | CB05+EM+SP+HONO heterogeneous reaction on aerosol and ground surfaces follow Aumont et al. [17] | Examine the impacts of other HONO parameterizations published in peer-reviewed articles | | HONO_SOA | CB05+HONO heterogeneous reaction with semivolatile organic follows Li et al. [18] |
| | 0.75 VOC | CB05 with the 25% VOC emission reduction over PRD region | Evaluation the possible effect on ozone control strategy due to consideration of additional HONO formation pathway | | 0.75 VOC w/HONO | CB05+EM+HT+SP with the 25% VOC emission reduction over PRD region |
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