一次霾天气条件下石家庄上空大气气溶胶数浓度的飞行探测与特征分析  

Aircraft Sounding and Characteristic Analysis of Atmospheric Aerosol Number Concentration over Shijiazhuang Area in a Haze Day

作　　者：金赛花[1] 濮江平[1] 张瑜[1] 董晓波[2] 王成林[1] 

机构地区：[1]解放军理工大学气象海洋学院,南京211101 [2]河北省人工影响天气办公室,石家庄050021

出　　处：《气象与环境科学》2015年第1期40-45,共6页Meteorological and Environmental Sciences

基　　金：国家973项目(2010CD950804);国家青年科学基金项目(41105075)资助

摘　　要：利用2010年8月30日河北省石家庄一次霾天气条件下的气溶胶飞行探测资料,分析了石家庄地区上空658—6933 m高度范围内大气气溶胶粒子平均数浓度、平均直径的垂直分布特征和9个水平飞行高度上的谱分布特征。结果表明：轻度霾天气条件下的气溶胶平均数浓度为325个/cm3,平均直径为0.169μm。在约1000 m高度以下,气溶胶平均数浓度随高度的增加呈线性减少趋势。粒径也随高度增加而减小,由0.187μm减小至0.164μm。1000 m高度以上,气溶胶平均数浓度随高度减少趋势变缓,粒子平均直径在0.167~0.171μm范围内波动。9个不同高度上的谱分布都呈单峰型,随着高度增加,谱宽变小,峰值向小尺度方向移动。后向轨迹计算分析表明：污染气团的远距离输送可能是导致大气1500 m高度层气溶胶数浓度突增的原因。Based on the data of the aircraft sounding of aerosol particles over the Shijiazhuang area in the haze day on August 30th, 2010, the vertical distribution characteristics of atmospheric aerosol particle mean number concentration and mean diameter were analyzed. The size spectrum distribution characteristics of aerosol particles at 9 different flight altitudes between 658 and 6933 meters were also analyzed. The results showed that the aerosol mean number concentration was 325 per cubic centimeter under the slight haze weather, and the mean particles diameter was 0. 169 μm. The mean number concentration decreased linearly under the 1000 m with the increase of the height, the same as the mean diameter, decreasing from 0. 187 μm to 0. 164 μm. Above 1000 m, the particles mean number concentration also decreased, but the trend became weaker. The mean diameters ranged from 0. 167 μm to 0. 171 μm. The particles size distribution of 9 different heights showed a unimodal distribution. The width of aerosol particles spectrum narrowed, and the peak diameters declined gradually with the increase of the height. The sharp increase of aerosol number concentration at 1500 m may be caused by the long distance transport of polluted air according to the air mass back trajectories model.

关 键 词：大气气溶胶 垂直分布 尺度谱分布 石家庄地区 

分 类 号：X513[环境科学与工程—环境工程]