衡水市空气主要污染物体积质量的时间分布特征

利用衡水市环境监测站2005—2007年度大气例行检测的数据，对衡水市大气中主要污染物SO^2、NO^2、PM10体积质量值的逐日数据进行统计分析，得出了衡水市空气污染的现状和时间变化规律：（1）污染物体积质量值的月变化曲线呈槽型分布，非取暖期的空气状况明显好于取暖期，取暖期SO^2平均体积质量是非取暖期的2．45倍；（2）污染物体积质量值的日变化曲线基本为两高两低型，其中取暖期污染指数早晨出现极高值的时间比非取暖期明显偏晚；（3）污染物体积质量值的年变化表明了SO^2的体积质量在降低，而NO^2的体积质量却有了小幅增长。

The Time Distribution of The Main Air Pollutants in Hengshui

Using the atmosphere routine testing data of environmental monitoring station in Hengshui during 2005-2007, this paper statistics and analyzes the daily data of the pollutant density of the main pollutants, such as SO2, NO2, PM10, gets the present situation and the time changes of Hengshui air pollutants , which provides the basis for air pollution control and research of the air pollution forecast. The time changes of the Hengshui air pollution are followed as below ： （1） The concentration of pollutants in month is in the distribution of Groove; The pollution of non-heating period is significantly better than that of the heating period ; The average concentration of SO2 is 2.45 times of that of the non-heating period. （2） The average pollution exponential curve is two highs and two lows and the highest value in the morning during the non-heating period appeared earlier than that during the heating period. （3）The changes of the concentration of pollutants in the year shows that the concentration of SO2 is decreasing, while the concentration of NO2 has a small increase.