Heterogeneous reactions of mineral dust aerosol: implications for tropospheric oxidation capacity

Mingjin Tang, Xin Huang, Keding Lu, Maofa Ge, Yongjie Li, Peng Cheng, Tong Zhu, Aijun Ding, Yuanhang Zhang, Sasho Gligorovski, Wei Song, Xiang Ding (+2 others)
2017 Atmospheric Chemistry and Physics  
<p><strong>Abstract.</strong> Heterogeneous reactions of mineral dust aerosol with trace gases in the atmosphere could directly and indirectly affect tropospheric oxidation capacity, in addition to aerosol composition and physicochemical properties. In this article we provide a comprehensive and critical review of laboratory studies of heterogeneous uptake of OH, NO<sub>3</sub>, O<sub>3</sub>, and their directly related species as well (including HO<sub>2</sub>, H<sub>2</sub>O<sub>2</sub>,
more » ... HONO, and N<sub>2</sub>O<sub>5</sub>) by mineral dust particles. The atmospheric importance of heterogeneous uptake as sinks for these species is assessed (i) by comparing their lifetimes with respect to heterogeneous reactions with mineral dust to lifetimes with respect to other major loss processes and (ii) by discussing relevant field and modeling studies. We have also outlined major open questions and challenges in laboratory studies of heterogeneous uptake by mineral dust and discussed research strategies to address them in order to better understand the effects of heterogeneous reactions with mineral dust on tropospheric oxidation capacity.</p>
doi:10.5194/acp-17-11727-2017 fatcat:7actlws64bfrbjpjykfppodqnm