乌鲁木齐市采暖期SO_2污染空间分布特征分析

对乌鲁木齐市采暖期进行SO2网格布点监测。结果表明:采暖期SO2浓度值分布在49~364μg/m3之间,72.4%的网格监测值超过国家二级日标准,污染严重。SO2浓度基本呈现4个梯度:第一梯度为市区西北部,SO2浓度小于120μg/m3;第二梯度为市区东北部,浓度为120~160μg/m3;第三梯度为第四梯度外围,SO2浓度为160~200μg/m3;第四梯度为市区中部及市区南部,SO2浓度大于200μg/m3。SO2污染随海拔高度的递增而增加,城市北部污染较轻,城市中心地带为重污染区域。

Analyzed on Space Distributing Character of Sulfur Dioxide Pollution during Heating Season in Urumqi City

Monitored concentration of sulfur dioxide during heating season in Urumqi city.The result shows concentration of sulfur dioxide is between 49 μg/m^3 with 364 μg/m^3 during heating season,72.4% gridding monitoring value exceeds day standard grade Ⅱof state,pollution status is high.Concentration of sulfur dioxide has four grads,the first grads distributes the northwest of Urumqi,its concentration is less than 120 μg/m^3,the second grads distributes the northeast of Urumqi,its concentration is 120～160 μg/m^3,the third grads distributes periphery of the forth grads,its concentration is 160～200 μg/m^3,the forth grads distributes midland and the south of Urumqi,its concentration is higher than 200 μg/m^3.Sulfur dioxide pollutant is enhanced with increase of height above sea level,pollution of the city north is low,and the city midland is high pollution region.