生态学杂志2024，Vol.43Issue(8)：2313-2324,12.DOI:10.13292/j.1000-4890.202408.002
沈阳市采暖期PM2.5浓度变化规律及其影响因素
Variation and influencing factors of PM2.5 concentration during the heating period in Shenyang
摘要
Abstract
With the continuous industrialization,hazy weather has occurred more and more frequently in major developed regions,which leads to the deterioration of atmospheric environment and seriously affects people's daily life and health.Based on the recorded data of PM2.5 concentration at the state controlled environmental air quality monitoring points in urban areas of Shenyang and meteorological data during the heating period of 2020-2021,we explored the spatial patterns and temporal dynamics of PM2.5 at different environmental scales in Shenyang,as well as the influence of different meteorological factors and land use types on the variations of PM2.5 concentration.The results showed that PM2.5 concentrations in the urban areas displayed a spatial pattern of low in the north and high in the south.PM2.5 concentrations during the heating period were in a decreasing order of March 2021＞January 2021＞February 2021＞December 2020＞November 2020.Temperature and relative humidity were significantly and positively correlated with PM2.5 concentrations,and wind speed was significantly negatively correlated with PM2.5 concentrations.At three different buffers,green space and water bodies were significantly negatively correla-ted with PM2.5 concentrations,squares were significantly negatively correlated with PM2.5 concentrations at 500 m and 1000 m buffer scales,and significantly negatively correlated with PM2.5 concentrations at 2000 m buffer scale.The results of hierarchical regression analysis showed that temperature,relative humidity,and green space contrib-uted the most to PM2.5 concentration,which indicates that haze weather in Shenyang during the heating period is mainly affected by temperature and humidity,and that urban green space,water body,square and wind can signifi-cantly reduce PM2.5 concentration.This study provides a reference for urban haze weather management and urban planning in Shenyang.关键词
采暖期/PM2.5/气象因子/土地利用类型/沈阳市Key words
heating period/PM2.5/meteorological factor/land use type/Shenyang引用本文复制引用
孔凡晴,吴美阳,屈海燕..沈阳市采暖期PM2.5浓度变化规律及其影响因素[J].生态学杂志,2024,43(8):2313-2324,12.基金项目
辽宁省研究生教育教学改革项目"学术型研究生知识创新能力培养的实践与探索"(LNYJG2022253)和辽宁省自然科学基金项目"基于PM2.5消减的沈阳市城区绿带植物孔隙率计算与优化模拟研究"(20180550535)资助. （LNYJG2022253）
