期刊
ATMOSPHERIC ENVIRONMENT
卷 46, 期 -, 页码 256-263出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2011.09.074
关键词
Marine nutrients; Aerosol solubility; Total soluble nitrogen; Ionic composition; Heterogeneous gas-particle interaction
资金
- Lebanese National Council for Scientific Research (CNRS)
- American University Research Board (URB)
Due to the implications caused by mineral dust and sea-salt heterogeneous reactions with SO2, NOx and NH3 derivatives, this study aims to understand the interaction between gaseous and particulate phases; PM10 and PM2.5, in dust-rich and dust-poor environments. During dust outbreaks, the increase in PM10 and PM2.5 mass concentrations by 80 and 75%, respectively, was accompanied with approximately 30% decrease in water soluble inorganic ions. However, nitrate ion concentration, which increased by 36% during dust-rich episodes, was correlated with a 96% increase in gaseous HONO concentration. This implies a significant impact of dust storms on the tropospheric NO2 to HONO conversion and consequently the formation of nitrate in PMs. Products of the reaction between HONO and mineral dust render atmospheric aerosols more soluble and consequently higher nitrogen deposition fluxes were calculated. (C) 2011 Elsevier Ltd. All rights reserved.
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