Characteristics of Negative Air Ion Concentration in Different Regions and Correlation with Meteorological Environmental Factors of Jinhua City
Using the negative air ion concentration(NAIC)and meteorological and environmental data of Jinhua city from 2019 to 2021,the spatial and temporal characteristics of NAIC in different regions(plain urban area,plain park,waterside scenic spot,mountain forest scenic spot)were analyzed in this paper.Besides,focusing on the urban areas with human activities,the correlation between the NAIC and meteorological environmental factors at different time scales,as well as the differences in different weather conditions were also provided.The results showed that the distribution characteristics of NAIC were low in plain areas and high in mountain areas.Dense vegetation and dynamic water flow could increase the NAIC and improve the concentration level.The NAIC was higher before sunrise and after sunrise in mountain forest scenic spots,higher in the small hours than that afternoon in waterside scenic spots,while reached its peak in the afternoon in plain areas.The diurnal variation trend of the four seasons in different regions was generally consistent,but there were differences in the peak value,daily range and peak moment of NAIC in different seasons.The seasonal difference of NAIC in different functional zones could be seen in this research,with the maximum value in the summer from June to September,especially in August in mountain forest scenic spots.The correlation between NAIC and meteorological environmental factors was quite different on different time scales.On the hourly time scale,it was significantly positively correlated with temperature,wind speed,rainfall and O3,while it was significantly negatively correlated with PM2.5;In terms of seasons,spring had the highest correlation with wind speed,temperature in summer,O3 in autumn and PM2.5 in winter;On the day scale,it had a significant positive correlation with relative humidity,wind speed and rainfall,and a significant negative correlation with PM2.5 and O3.In addition,the NAIC on rainy days was significantly higher than other weather conditions,with the difference reaching its maximum value in winter.
negative air ionspatial and temporal distributionmeteorological environmental factorsJinhua city
国家科技期刊平台
NSTL
万方数据
