20年来昆明市环境空气质量变化趋势及影响因素分析

通过昆明市环境空气监测资料，研究昆明市20a来环境空气质量的变化趋势及其影响因素。结果表明，从年际变化看二氧化硫有明显上升趋势；二氧化氮有上升趋势，但不明显；综合污染指数、可吸入颗粒物有明显下降趋势。20a来环境空气质量变化的主要影响因素有：产业结构的变化、重点污染源的整治、节能减排和能源结构调整、清洁能源的使用、机动车尾气的控制等。

Trend of Air Quality and Impacting Factors of Kunming Urban Area since Recent Twenty Years

The trend and impacting factors of air quality of Kunming are studied based on recent twenty years＇ monitoring data. The results show that SO2 increased distinctly year by year as well as NO2 with unconspieuous growth, and comprehensive pollution index and inhalable particle decreased evidently. The main factors impacting the changes include adjustment of industry structure and treatment of the key pollution sources and measures on reducing pollution discharge.