石家庄休闲园区夏季空气质量变化规律

Variation Law of Air Quality in Shijiazhuang Leisure Park in Summer

为明确石家庄周边休闲观光园区的夏季环境空气质量变化规律,以石家庄市平山县驼梁景区、鹿泉区紫藤庄园、元氏县林外林庄园、新华区河心岛风景区为研究对象,对其空气温度、湿度、PM_(2.5)和负氧离子等环境因子进行测定。结果表明:(1)4个区域的月均温度和月均湿度差异均较大。不同区域的月均温度变化趋势不同,除紫藤庄园呈“V”型外,其他地区均呈“\”型;月均空气相对湿度变化均呈“/”型,8月达到峰值(70%~80%)。(2)4个地区PM_(2.5)浓度月变化和日变化差异均较大。不同区域的月均PM_(2.5)浓度变化趋势不同,除紫藤庄园呈“∧”型外,其他区域均呈“\”型;日均PM_(2.5)浓度变化整体呈上升趋势,12:00~13:00达到峰值。(3)4个地区NAI浓度月变化和日变化差异均较大。不同区域的月均NAI浓度变化趋势不同,除河心岛景区呈“V”型外,其他3个区域均呈“/”型;日变化均呈“V”型,其中驼梁景区呈深“V”型。(4)月均NAI浓度与月均PM_(2.5)浓度和月均温度均呈负相关,即:随着空气温度的升高,NAI浓度逐渐降低,PM_(2.5)浓度逐渐增加,空气NAI在一定程度上抑制PM_(2.5)的产生。

In order to clarify the variation law of ambient air quality in summer in leisure and sightseeing parks around Shijiazhuang,the environmental factors such as air temperature,humidity,PM2.5 concentration and negative oxygen ions were measured in Camel Beam Scenic Area in Pingshan County,Ziteng Manor in Luquan District,Linwailin Manor in Yuanshi County and Hexin Island Scenic Area in Xinhua District. The results showed that:(1) there were great differences in monthly average temperature and humidity in the four regions. The variation trend of monthly average temperature in different regions was different. Except that Ziteng Manor showed‘ V’ type, the other regions showed‘ \’ type. The change of monthly average air relative humidity showed‘\’type,and the peak value was obtained in August(70%-80%).(2) The monthly and daily variations of PM2.5 concentration in the four regions were quite different. The variation trend of monthly average PM2.5 concentration in different regions was different. Except Ziteng Manor showed‘Λ’type,the other regions showed‘\’type. The daily average PM2.5 concentration showed an overall upward trend and reached the peak from12:00 to 13:00.(3) The monthly and daily variation of NAI concentration in the four regions were quite different. The variation trend of monthly average NAI concentration in different regions was different. Except for the ‘V’type in Hexin Island Scenic Area, the other three regions were‘ \’ type. The diurnal variation showed a‘ V’ type, of which Camel Beam Scenic Area showed a deep‘ V’ type.(4) The monthly average NAI concentration was negatively correlated with the monthly average PM2.5 concentration and monthly average temperature,that was,with the increase of air temperature,the NAI concentration gradually decreases and the PM2.5 concentration gradually increased.Air NAI had a certain inhibitory effect on the production of PM2.5.