项目名称: 三级分档雾水化学与雾微结构相关性研究
项目编号: No.41275151
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 樊曙先
作者单位: 南京信息工程大学
项目金额: 88万元
中文摘要: 雾水化学特性与雾滴大小密切相关,雾水分档收集是能否深入研究大气污染物和雾微物理结构关系的关键。2006-2009年南京雾滴谱观测资料分析表明,浓雾和强浓雾阶段,粒径4-10、10-17、>17μm的雾滴含水量出现峰值,峰值直径为5、13、21μm,这是分三档收集雾水的观测依据。本项目旨在南京郊区、市区进行综合观测,涉及雾水三级分档收集、气溶胶粒子分级采集、痕量气态污染物、雾滴谱、边界层气象要素等;以对比分析雾滴粒径 4-10、10-17、﹥17μm的雾水离子浓度、有机酸浓度、pH值特征,气溶胶PM10分级粒子的离子浓度、有机酸浓度特征,雾微物理量特征。揭示不同尺度雾滴的化学成分与大气污染物、雾的微物理结构之间的关系,探索雾过程中气溶胶的化学成分谱分布、痕量气态污染物对不同尺度雾滴化学成分的差异性的影响。为建立雾物理化学模式提供理论依据,为验证和应用模式提供外场观测资料。
中文关键词: 分档雾水化学;雾微结构;气溶胶;气态污染物;
英文摘要: The chemical characteristics of fog water are closely related to fog droplet size, therefore, collection of fog water with different droplet sizes is the key technology for research on the relationship between atmospheric pollutant and fog microphysical structure. The results of observation on fog droplet size distribution in Nanjing from 2006 to 2009 showed that, during the dense fog and severe fog period, the liquid water content of fog droplets with diameter in the range of 4 to 10 μm, 10 to 17 μm and larger than 17 μm were high, and appeared three peak diameter around 5 μm, 13 μm, and 21 μm. These results provided factual basis for collection of 3-stage fog water. A comprehensive fog campaign will be conducted in Nanjing suburban and urban areas, which includes collection of 3-stage fog water, collection of aerosol with different sizes, and observations of trace gaseous pollutants, fog droplet size distribution and boundary layer meteorological elements. First, the data will be used to compare the difference of ion concentrations, organic acid concentrations and pH values in the fog droplets with diameter in the range of 4 to 10 μm, 10 to 17 μm and larger than 17 μm, the difference of ion concentrations and organic acid concentrations in the aerosol particles with different sizes, and the difference of micr
英文关键词: Drop size-dependent fog chemistry;Fog microphysical;structure;Aerosol;Gaseous pollutant;