西双版纳城、郊雾水化学组成分析

Chemical compositions of the fogs in the city and suburban of Xishuangbanna

利用 1997年 11月西双版纳城、郊雾的外场试验观测资料 ,从该地区雾水化学组成与其他地区雾水化学组成的比较、雾水化学组成与环境的关系、雾水化学组成的来源、雾水化学成分的浓度与雾的微物理结构的关系等几个方面分析了该地区雾的化学特征 .结果表明 ,西双版纳城郊雾水明显呈碱性 ,F-浓度比我国其他地区高很多 ;由于生态环境的不同 ,西双版纳城郊雾的化学成分浓度有很大差异 ;与历史资料比较 ,西双版纳城区雾水总离子浓度明显增加 ;雾水的化学组成与当地的气溶胶、土壤的化学组成密切相关 ;雾水总离子浓度与雾滴粒径有关 .

Observed results of the chemical compositions of fogs in Xishuangbanna city and suburban area for Dec.1997 are presened.Compared with other regions of China,the pH value and concentration of F\+- are very high.Owing to the difference of ecoenvironment in city & suburban area,the total ions concentration of city is higher than of suburb obviously.Because of the development of city and variation of environment,comparing with history data,the total ions concentration of city increased much rapidly in the last ten years.It is found that the chemical compositions of fogs are correlated closely with the chemical compositions of aerosol and soil.It is also found that the ion concentration of fogs shows retro\|correlation with the size of fog droplet.