Influence of Atmospheric Particulate Matter on Ozone in Nanjing, China: Observational Study and Mechanistic Analysis
Sign Up to like & getrecommendations! Published in 2018 at "Advances in Atmospheric Sciences"
DOI: 10.1007/s00376-018-8027-4
Abstract: Particulate matter with diameters of 2.5 μm or smaller (PM2.5) and ozone (O3) are major pollutants in the urban atmosphere. PM2.5 can affect O3 by altering the photolysis rate and heterogeneous reactions. However, these two… read more here.
Keywords: pm2; photolysis rate; chemistry; pm2 pm2 ... See more keywords
Trends in the sizes and carbonaceous fractions of primary emitted particulate matter in China from 1960 to 2019
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DOI: 10.1093/nsr/nwaf003
Abstract: ABSTRACT The health impacts of particulate matter (PM) depend on its concentration, size and composition. Herein, we quantified the changes in the emissions of primary PM2.5, PM2.5–10 and PM>10 with aerodynamic diameters of 10 μm,… read more here.
Keywords: pm2 pm2; 1960 2019; trends sizes; sizes carbonaceous ... See more keywords
北京西山不同海拔油松林PM 2.5 浓度及叶片吸附量变化规律
Sign Up to like & getrecommendations! Published in 2017 at "Acta Ecologica Sinica"
DOI: 10.5846/stxb201511112283
Abstract: 以北京西山不同海拔梯度油松人工林为研究对象，对油松林PM2.5浓度变化和叶片PM2.5吸附量进行分析，并应用电子显微镜对不同海拔油松叶表面微形态特征进行观察，阐释叶片吸附PM2.5差异。结果表明：随着海拔升高PM2.5质量浓度逐渐降低，不同海拔油松林PM2.5质量浓度日变化均呈典型的双峰曲线，7：00和19：00是一天的两个峰值，最小值出现在13：00-15：00左右；从不同月份看，不同海拔油松林PM2.5质量浓度最高值出现在冬季的2月，最低值在8月；不同海拔油松林PM2.5质量浓度全年均值为84 m（（102.28±18.44）μg/m3）> 110 m（（94.18±18.34）μg/m3）> 160 m（（81.53±19.23）μg/m3）> 230 m（（75.39±15.71）μg/m3）；随着海拔升高单位叶面积PM2.5吸附量逐渐减小，每升高50 m，单位叶面积PM2.5吸附量降低23.25%，每公顷PM2.5吸附量下降26.43%，不同海拔油松林每公顷PM2.5吸附量全年均值为84 m（（8.61±1.08）kg/hm2）> 110 m（（7.30±0.94）kg/hm2）> 160 m（（6.35±0.99）kg/hm2）> 230 m（（4.34±1.14）kg/hm2）；处于低海拔的油松叶表面较粗糙，气孔内部和周围聚集大量颗粒物，在叶面形态上更有利于吸附PM2.5，高海拔则相反。高海拔空气质量优于低海拔，低海拔的植物吸附颗粒物多于高海拔。研究结果可为城市造林和森林净化大气提供数据支持。 read more here.
Keywords: pm2 pm2; pm2; hm2;