2013年1月京津冀地区强雾霾频发成因初探  

Preliminary Study of the Dense Fog and Haze Events' Formation over Beijing-Tianjin-and-Hebei Region in January of 2013

作　　者：孟晓艳[1] 余予[2] 张志富[2] 李钢[1] 王帅[1] 杜丽[1] 

机构地区：[1]中国环境监测总站,北京100012 [2]国家气象信息中心,北京100081

出　　处：《环境科学与技术》2014年第1期190-194,共5页Environmental Science & Technology

基　　金：国家环境保护公益性行业科研专项(201009001-4);中国气象局气候变化专项(CCSF201338)

摘　　要：基于2001-2013年的气象观测数据和环境空气质量监测数据,针对京津冀地区1月同期的雾霾天数、能见度、环境空气污染物浓度等展开分析,结果表明:2013年1月京津冀地区平均雾霾天数发生了21.7 d;污染物浓度超标严重,高浓度的颗粒物成为强雾霾频发的重要原因,PM10月均浓度为0.317 mg/m3,PM2.5为0.219 mg/m3;1月份京津冀地区气象要素表现为地面风速小、相对湿度高、大气层结稳定,更加促进大气污染物累积,并有利于颗粒物吸湿增长,致使空气质量恶化,强雾霾事件频发。Fog and haze days, visibility and air pollutants concentration of January in recent 13 years over Beijing-Tianjin- and-Hebei Region were analyzed based on the meteorological data and air quality data. The results showed that there were 21.7 fog and haze days in average over the region in January of 2013. The pollutant concentrations were highly over the criterion. High density of particles was an important factor that caused the dense fog and haze events. The monthly mean values of PM10 concentration and PM2.5 concentration in January of 2013 were 0.317 mg/m3 and 0.219 mg/m3 respectively. As to the meteorological condition, low Wind speed, high relative humility and stable atmospheric stratification in the near surface, jointly caused the accumulation of air pollutants and these were beneficial to particulate matter hygroscopic growth. These meteorological conditions were also important reasons for the air quality deterioration and recurrent dense fog and haze events.

关 键 词：强雾霾事件 空气污染物 气象条件 

分 类 号：X513[环境科学与工程—环境工程]