京津冀重污染大气污染物输送路径分析  

The Transmission Paths Analysis of Heavy Air Pollution Episode in Beijing-Tianjin-Hebei Region

作　　者：孙韧[1,2] 肖致美[3] 陈魁[3] 高璟赟[3] 刘彬[3] 杨宁[3] 李鹏[3] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]天津市环境保护局,天津300191 [3]天津市环境监测中心,天津300191

出　　处：《环境科学与技术》2017年第12期159-164,共6页Environmental Science & Technology

基　　金：国家科技支撑计划课题(2014BAC23B01;2014BAC23B03);天津市科技计划项目专项(15YFYSSF00030)

摘　　要：基于HYSPLIT模型,模拟2014年2月19日至2月27日京津冀空气重污染气团24 h后向轨迹。结果表明,京津冀区域重污染期间1000 m高空存在西南输送通道,京津冀三地24 h气团源地分别为河北南部、山东聊城或河北邯郸、山西东南或河南北部。重污染期间,近地层100 m处风速气流表现为西南-南风,风速<3 m/s时,空气质量会达到五级重度污染及以上水平;近地层100m处气流也可能是较强的东南风,能缓解区域空气染污程度。重污染清除过程中高空表现为下沉气流,且100 m处风速>10 m/s。京津冀地区空气质量指数(AQI)与近地层100 m高空风速有显著相关性,相关系数为0.804,可根据低空风速预测空气重污染。The 24-hour backward trajectories of Beijing-Tianjin-Hebei Region were calculated from February 19 to February 27 2014 based on HYSPLIT model in the particular situation of this severe heavy air pollution episode. Results showed that there exists transportation channel from south-west among Beijing-Tianjin-Hebei Region above 1000 m high altitude, the 24-hour air mass origin lands of Beijing-Tianjin-Shijiazhuang are respectively southern of Hebei, Liaocheng or Handan, southeast of Shanxi or northern of Henan. During the heavy air pollution, the air flow（100 m） direction wing from southwest to south in most of the time, and when its speed is less than 3 m/s, the air quality is interior to severe pollution of level V. The air flow（100 m） is characterized by strong east wind occasionally, which would ease pollution to a certain extent.When the heavy air pollution is eliminating, there would be a high sinking airflow in 100 m high, and its velocity would more than 10 m/s. There have significant correlation between air quality index（AQI） and wind speed（100 m）, and heavy air pollution episode can be forecasted according to wind speed（100 m）.

关 键 词：区域传输 后向轨迹 重污染天气 京津冀 

分 类 号：X51[环境科学与工程—环境工程]