气象科学2017，Vol.37Issue(2)：141-150,10.DOI:10.3969/2015jms.0090
亚青会期间南京地区大气冰核的观测分析
Measurement analysis of atmospheric ice nuclei in Nanjing during the Asian Youth Games
摘要
Abstract
During the Asian Youth Games from August 2 to 26,2013,the atmospheric ice nuclei in Nanjing was measured and sampled.Moreover,combined with the aerosols and meteorological elements observation data,the distribution characteristics of ice nuclei concentration and the influence of aerosols variation on ice nuclei concentration were further analyzed under the pollution controls.Results show that the atmospheric aerosol concentration significantly decreased under the measurements of pollution control,and the ice nuclei concentration did not decrease under the influence of a variety of factors,but had obvious diurnal variation.Ice nuclei concentration will significantly increase as the increasing of various pollutants' concentration.The observed ice nuclei concentration was 0.38 L-1 to 50.55 L-1 at the activation temperature from-12 ℃ to-23 ℃ and the saturation with respect to water is 100％.Based on measurements,a parametric equation N(T,Si) =0.003 1exp (-0.254 9 T+0.161 6Si)was developed to represent the variations of IN concentration with temperature and supersaturation.The aerosols in the size range of 1-10 μm acting as ice nuclei were more than that in other size ranges.The further analysis on the relationship between ice nuclei concentration and PM2.5,PM10,PM10-PM2.5 found that the correlation of ice nuclei concentration and PM10-PM2.5 was more obvious and the correlation coefficient was 0.55,which indicated that aerosol particles in the larger size range are more likely to act as ice nuclei and then have more important effects on the formation process of cold clouds.关键词
大气冰核/气溶胶/静力真空水汽扩散云室Key words
Atmospheric ice nuclei/Aerosol/Static vacuum water vapor diffusion chamber分类
资源环境引用本文复制引用
高任杰,银燕,蒋惠,袁亮,李琦..亚青会期间南京地区大气冰核的观测分析[J].气象科学,2017,37(2):141-150,10.基金项目
国家自然科学基金资助项目(41030962) （41030962）
江苏高校优势学科建设工程项目(PAPD) （PAPD）
