Effect of nitryl chloride chemistry on air quality in South Korea during the KORUS-AQ campaign
Kim, H., Park, R. J., Kim, S., Jeong, J. I., Jeong, D., et al. (2023). Effect of nitryl chloride chemistry on air quality in South Korea during the KORUS-AQ campaign. Atmospheric Environment, doi:https://doi.org/10.1016/j.atmosenv.2023.120045
| Title | Effect of nitryl chloride chemistry on air quality in South Korea during the KORUS-AQ campaign |
|---|---|
| Genre | Article |
| Author(s) | H. Kim, R. J. Park, S. Kim, J. I. Jeong, Daun Jeong, X. Fu, S. Cho |
| Abstract | Nitryl chloride (ClNO2) can play an important role in determining ozone and particulate matter (PM) chemistry as a nighttime reservoir of NOX and a source of chlorine radical (Cl BULL; ) in the daytime in polluted environments. We present a quantitative evaluation of the impact of tropospheric ClNO2 chemistry on air quality in South Korea using extensive observations during the Korea-United States Air Quality (KORUS-AQ) field study and a 3-D chemical transport model (CTM). We first estimated anthropogenic emissions of reactive chlorine in South Korea to implement it along with the latest Chinese emissions in the model. A comparison between the simulated and observed ClNO2 concentrations during the KORUS-AQ campaign shows that the model captures the observed spatial and temporal variations, including local and transboundary transport of ClNO2 and its precursors. The model simulation highlights that ClNO2 plays a significant role in nighttime NOX chemistry by efficiently converting NO to NO2. In addition, it causes a noticeable acceleration of the NOX-O3 cycle. When averaged over the campaign, adding ClNO2 chemistry into the model leads to an increase of O3 (1.1%), NOX (3.1%), BULL; OH (2.0%), HO2 BULL; (0.8%), and Cl BULL; (507.8%) and a decrease of TNO3 (HNO3 + aerosol nitrate, 1.7%). |
| Publication Title | Atmospheric Environment |
| Publication Date | Nov 1, 2023 |
| Publisher's Version of Record | https://doi.org/10.1016/j.atmosenv.2023.120045 |
| OpenSky Citable URL | https://n2t.org/ark:/85065/d7dz0dbz |
| OpenSky Listing | View on OpenSky |
| EDEC Affiliations |