2020年9月1—12日驻马店市空气污染气象条件分析

Analysis of Meteorological Conditions for Air Pollution in Zhumadian From September 1-12,2020

2020年9月1—12日,驻马店AQI值同比增大0.7%,空气质量较去年同期略偏差,PM2.524 h平均浓度均在35μg/m^(3)以下(对应空气质量为优),PM2.5浓度较去年同期下降20.6%。PM1024 h平均浓度在9月2日、9月6—9日、9月11日有所上升,在55~68μg/m^(3),其他时间均在在50μg/m^(3)以下(PM1024 h平均浓度在50μg/m^(3)以下对应空气质量为优,50~150μg/m^(3)对应空气质量为良),PM10浓度较去年同期下降17.5%。臭氧浓度(O_(3)8 h)在9月1日、9月2日、9月5—8日、9月11日在150μg/m^(3)以上,达到轻度污染,其他时间均在150μg/m^(3)及以下,臭氧浓度(O_(3)8 h)较去年同期升高6.0%。污染日数共计7 d,均为臭氧轻度污染,臭氧污染日数同比增加17%。与周边地市相比,驻马店市臭氧污染日数最多,平均臭氧浓度(O_(3)8 h)最高,导致优良天数损失较多。臭氧浓度与紫外线辐射,气温、风速和湿度呈显著的相关性,9月1—12日驻马店市日平均气温24.5℃,较去年同期(23.7℃)偏高0.8℃;日照时数为97 h,较去年同期(72 h)偏多25 h;平均相对湿度73.1%,较去年同期(74.7%)偏小;日平均风速1.5m/s,较去年同期(1.6 m/s)偏小,白天小时平均紫外辐射辐照度为175 W/m^(2),较去年同期(158W/m^(2))偏高11%。晴天少云、温度较高、相对湿度较低、风速较小以及紫外辐射增强,这是驻马店臭氧浓度偏高的重要气象因素。

From September 1 to 12,the AQI value of Zhumadian increased by 0.7%year-on-year,and the air quality was slightly deviated from the same period last year.The 24-hour average concentration of PM2.5 was below 35μg/m^(3)(corresponding to excellent air quality),and the concentration of PM2.5.This is a decrease of 20.6%from the same period last year.The hourly average concentration of PM1024 increased on September 2,September 6~9,and September 11,between 55~68μg/m^(3),and all other times were below 50μg/m^(3)(PM1024 hourly average concentration The air quality below 50μg/m^(3) is excellent,and the air quality corresponding to 50~150μg/m^(3) is good),and the PM10 concentration decreased by 17.5%compared with the same period last year.The ozone concentration(O_(3)8 h)was above 150μg/m^(3) on September 1,September 2,September 5~8,and September 11,reaching light pollution.The ozone concentration was 150μg/m^(3) and below at other times.(O_(3)8 h)An increase of 6.0%over the same period last year.The total number of pollution days was 7 days,all of which were lightly polluted by ozone.The number of days of ozone pollution increased by 17%year-on-year.Compared with the surrounding cities,Zhumadian City has the most days of ozone pollution,and the average ozone concentration(O_(3)8 h)is the highest,leading to more loss of good days.There is a significant correlation between ozone concentration and ultraviolet radiation,temperature,wind speed and humidity.The daily average temperature of Zhumadian City from September 1~12 is 24.5℃,which is 0.8℃higher than the same period last year(23.7℃);the sunshine duration is 97 h,which is higher than that The same period last year(72 h)was 25 hours more;the average relative humidity was 73.1%,which was lower than the same period last year(74.7%);the average daily wind speed was 1.5 m/s,which was lower than the same period last year(1.6 m/s),and the hourly average ultraviolet radiation during the day The irradiance is 175 W/m^(2),which is 11%higher than the same period last year(158 W/m^(2)).Less clouds in sunny days,higher temperature,lower relative humidity,lower wind speed and increased ultraviolet radiation are important meteorological factors for the high ozone concentration in Zhumadian.