| 钟玉婷,刘新春,何清,陆辉,赵克蕾.乌鲁木齐冬季黑碳气溶胶污染特征初步研究[J].沙漠与绿洲气象,2014,8(6):36~40 |
| 乌鲁木齐冬季黑碳气溶胶污染特征初步研究 |
| Pollution Characteristics and Source of Black Carbon Aerosol in Urumqi in Winter |
| 投稿时间：2014-09-02 修订日期：2014-09-02 |
| DOI： |
| 中文关键词: 黑碳气溶胶(BC) 变化特征 后向轨迹 污染输送 |
| 英文关键词:Black Carbon aerosol Variation character BackwardStrajectory Pollution transfer |
| 基金项目: |
|
| 摘要点击次数: 997 |
| 全文下载次数: 1579 |
| 中文摘要: |
| 利用2010年2月乌鲁木齐大气成分观测站黒碳仪观测数据,结合散射系数及常规观测资料,对乌鲁木齐冬季黑碳气溶胶浓度变化特征进行了分析,并通过气流后向轨迹进行了来源分析。结果表明：(1)观测期间BC质量浓度日平均值为12707±4673 ng.m-3,浓度变化范围为4916~22997 ng.m-3,散射系数日均值为1086±561Mm-1,变化范围为350~2232 Mm-1。BC质量浓度和散射系数日均值变化趋势基本一致；(2)BC质量浓度日变化具有明显的峰值和谷值,峰值分别出现在9~11时和20~22时,谷值分别出现在4~6时和16~18时,散射系数与BC质量浓度日变化趋势基本一致,相对其有一定的滞后。春节期间燃放烟花爆竹对空气污染物浓度上升有明显作用,显著影响BC质量浓度日变化规律；(3)乌鲁木齐冬季大气层结稳定,污染物不易扩散,风速和降水对黑碳气溶胶浓度具有明显的稀释作用。在乌鲁木齐特殊的地形和气象条件下,本地源排放与来自周边城市群污染物输送的叠加使得污染更加严重。 |
| 英文摘要: |
| Based on Black Carbon aerosol (BC) observations in Urumqi atmospheric composition observatory in February 2010, combined with the scattering coefficient and conventional observation data, the Black Carbon aerosol (BC) concentration variation characteristics in winter were analyzed, and the source was analyzed through backwardStrajectory. The results showed that the daily average concentration of BC is 12707±4673 ng.m-3 with the range 4916~22997 ng.m-3 and the daily average concentration of scattering coefficient is 1086±561Mm-1 with the range 350~2232 Mm-1 during winter in Urumqi, while the variational trend of BC concentration and scattering coefficient is basically identical. The daily variation of BC concentration is characterized by obvious peak and vale in winter with the highest concentration at 9~11 and 20~22 and the lowest at 4~6 and 16~18, while the daily variation of scattering coefficient is same with BC concentration with certain hysteresis. Fireworks during the Spring Festival had obvious effect to the air pollutant concentration increased, significantly affected the change rule of BC concentration. In winter, the atmosphere is stable and the pollution is not easy to spread, while wind speed and precipitation can dilute BC concentration obviously in Urumqi. Because of special terrain and weather conditions in urumqi, local sources and the pollutant transportation from the surrounding urban make pollution more seriously. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
|
|