营口市环境空气污染特征分析

营口市环境空气质量时空变化特征显著。PM_(2.5),PM_(10),SO_(2),NO_(2),CO冬季污染最重,采暖期明显高于非采暖期;O_(3)夏季污染最重,非采暖期高于采暖期。PM_(2.5),PM_(10),SO_(2),NO_(2),O_(3)月变化特征为双峰型,CO月变化规律性较差,各污染物高值月份不同。PM_(2.5),PM_(10),SO_(2),NO_(2),CO日变化特征为双峰型,一日中有两个相对污染较重的时段,O_(3)浓度日变化特征为单峰型,一日中仅有一个相对高值时段。PM_(2.5),SO_(2),NO_(2),CO浓度高值点位集中在东部城区,西部和南部城区浓度较低;PM_(10)浓度高值点位集中在东部和南部城区,西部城区浓度较低;O_(3)浓度高值点位集中在西部和南部城区,东部城区浓度较低。

The spatial and temporal variation characteristics of ambient air quality in Yingkou City are significant.PM_(2.5),PM_(10),SO_(2),NO_(2) and CO pollution are the most serious in winter,and the pollution in heating period is significantly higher than that in non heating period;O_(3) pollution is the most serious in summer,and it is higher in non heating period than in heating period.The monthly variation characteristics of PM_(2.5),PM_(10),SO_(2),NO_(2) and O_(3) are bimodal,the monthly variation regularity of CO is poor,and the high value months of each pollutant are different.The daily variation characteristics of PM_(2.5),PM_(10),SO_(2),NO_(2) and CO are bimodal.There are two relatively heavy pollution periods in a day.The daily variation characteristics of O_(3) concentration are single peak and there is only one relatively high value period in a day.The high concentration points of PM_(2.5),SO_(2),NO_(2) and CO are concentrated in the eastern urban area,while the concentration in the western and southern urban areas is relatively low;The high PM_(10) concentration points are concentrated in the eastern and southern urban areas,while the concentration in the western urban areas is relatively low;The high O_(3) concentration points are concentrated in the western and southern urban areas,while the concentration in the eastern urban areas is relatively low.