本溪市大气颗粒物变化特征及其与气象要素的关系

doi:10.3969/j.issn.1673-503X.2017.01.008

Abstract

Abstract: Data of the particulate matter mass concentrations and surface meteorological elements (i.e.wind speed,air temperature,relative humidity and atmospheric pressure) throughout 2014 in Benxi were used to evaluate the monthly and seasonally variations of particulate matters and their correlations with meteorological elements.The results show that the particulate matter concentrations are relatively high in July and October,while relatively low in May and September.Moreover,the concentration ratios of particulate matters in June and November are high.The concentrations of PM₁₀ are lower with the average value of 115.1 μg·m^-3,whereas those of PM_2.5 and PM_1.0 are higher,with the average values of 99.5 μg·m^-3 and 86.1 μg·m^-3,respectively.The correlations between particulate matter mass concentrations and wind speeds appear the most significant in spring and winter,and those between particulate matter mass concentrations and relative humidity appear the most significant in summer and winter.The mass concentrations of PM_2.5 and average temperatures show significantly positive correlations in case that they are below 200 μg·m^-3 with the coefficient of 0.5288,and that of the mass concentrations of PM_2.5 and relative humidities are as high as 0.6981.Higher temperature and humidity,as well as lower wind speed,are the active meteorological conditions leading to pollution events with high particulate matter concentrations over Benxi.

Key words: Particulate matter, Temporal variation, Meteorological elements, Correlation

CLC Number:

P427.2

LI Yang, ZHAO Hu-jia, MA Yan-jun, ZHU Yi-ming, LI Xiao-xiao. Variation characteristics of particulate matter and its correlations with meteorological elements over Benxi[J]. Journal of Meteorology and Environment, 2017, 33(1): 58-65.

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http://www.jme1984.net.cn/EN/Y2017/V33/I1/58

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Variation characteristics of particulate matter and its correlations with meteorological elements over Benxi

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