Details

Autor(en) / Beteiligte

• SARWAR, Golam
• PINDER, Robert W
• WYAT APPEL, K
• MATHUR, Rohit
• CARLTON, Annmarie G

Titel

Examination of the impact of photoexcited NO2 chemistry on regional air quality

Ist Teil von

• Atmospheric environment (1994), 2009-12, Vol.43 (40), p.6383-6387

Ort / Verlag

Kidlington: Elsevier

Erscheinungsjahr

2009

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• Impact of the excited nitrogen dioxide (NO2a-) chemistry on air quality in the U.S. is examined using theaaCommunity Multiscale Air Quality (CMAQ) model for a summer month. Model simulations were conducted with and without the NO2a- chemistry. The largest impact of the NO2a- chemistry in the eastern U.S. occurred in the northeast and in the western U.S. occurred in Los Angeles. While the single largest daily maximum 8-h ozone (O3) increased by 9aappbv in eastern U.S. and 6aappbv in western U.S., increases on most days were much lower. No appreciable change in model performance statistics for surface-level O3 predictions relative to measurements is noted between simulations with and without the NO2a- chemistry. Based on model calculations using current estimates of tropospheric emission burden, the NO2a- chemistry can increase the monthly mean daytime hydroxyl radicals (OH) and nitrous acid (HONO) by a maximum of 28% and 100aapptv, respectively.