Effect of bromine and iodine chemistry on tropospheric ozone over Asia-Pacific using the CMAQ model.

ABSTRACT: Recent studies have focused on the chemistry of tropospheric halogen species which are able to deplete tropospheric ozone (O₃). In this study, the effect of bromine and iodine chemistry on tropospheric O₃ within the annual cycle in Asia-Pacific is investigated using the CMAQ model with the newly embedded bromine and iodine chemistry and a blended and customized emission inventory considering marine halogen emission. Results indicate that the vertical profiles of bromine and iodine species show distinct features over land/ocean and daytime/nighttime, related to natural and anthropogenic emission distributions and photochemical reactions. The halogen-mediated O₃ loss has a strong seasonal cycle, and reaches a maximum of -15.9 ppbv (-44.3%) over the ocean and 

SUBMITTER: Huang Y 

PROVIDER: S-EPMC7658052 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature