Seasonal Interactive Relationships Between Tropospheric Nitrogen Dioxide Surface Concentration and Nitrate Dry Deposition Over China: Winter/Summer Analysis

摘要：

The interactions between tropospheric nitrogen dioxide and nitrate dry deposition in summer and winter of 2004 in China are analyzed by using Community Multi-scale Air Quality CMAQ (version. 4.4) coupled with the Regional Atmospheric Meteorological System (RAMS). Results indicate that NO2 and dry nitrate deposition chemical relationships are governed by OH photochemical activity mostly in summer daytimes at upper troposphere, but also by other parameters such as N2O5 heterogeneous reactions and NO3 radical transformations in both winter and summer mainly in night. Nighttimes reactions in winter contribute to about 28％ of NO2 loss and 32％ nitrate dry deposition increment versus 19％ and 26％ respectively in summer. In winter, maximal NO2 engenders minimal nitrate dry deposition containing 67％ of NO3．Minimum NO2 in summer generating maximal nitrate dry deposition with 87％ of NO3. The sensitivity trends of key gas such as NO2, OH and HNO3 derived from Nox source perturbation indicate that HNO3 dry deposition from upper troposphere is mainly in summer and from lower troposphere in winter, suggesting the importance of altitude in the photochemical process.

关键词： seasonal interactive relationships nitrogen dioxide nitrate dry deposition OH heterogeneous reactions China

作者: Alex E. GBAGUIDI CHEN Jinnan WANG Zifa GAO Chao

作者单位: Beijing Institute of Technology, School of Chemical Engineering and Environment, Beijing 100081, Chi Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

会议类型: 国际会议

会议名称: 2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-11-13（万方平台首次上网日期，不代表论文的发表时间）