摘要
本文结合2011年重庆区域灰霾统计结果表明,灰霾污染状况已逐步由重度和严重灰霾向轻中度灰霾污染过渡,污染程度得到好转。灰霾/非灰霾对比发现颗粒物PM2.5污染浓度较高,超标率较大,占颗粒物污染较大比重,且对能见度影响显著。2011年BC/PM2.5平均比值为18%左右,且比值时间序列变化趋势与全年灰霾污染总体发生趋势相符。
Based on the statistic data in 2011, the pollution of haze in Chongqing was turning better from serious level to light or middle lever. By comparison between haze and nonhaze it was found that PM2.5 concentration was high with high exceeding standard rate. It accounted for a big proportion in the pollution of particulate matter and had a significant effect on visibility. The average ratio of BC/PM2.5 was 18% in 2011, of which the change with time coincided with the tendency of the haze pollution all year round.
出处
《四川环境》
2012年第5期26-29,共4页
Sichuan Environment
