【摘要】 文章以山东省泰安市针阔混交道路林和阔叶混交道路林为研究对象,于2016—2017年,分别在道路、林缘、林内和林外进行不同粒径颗粒物的观测,研究两种混交林在不同气象条件下对颗粒物的影响。结果表明,气象条件显著影响道路景观林对颗粒物的削减作用,且对不同粒径颗粒物削减作用不一致。在"晴朗微风"和"雨后晴天"气象下,从道路到林外,颗粒物浓度呈下降趋势,而在"阴天"和"雾霾"气象下呈上升趋势。在"晴朗微风"和"雨后晴天"气象下,两种道路林对颗粒物均存在一定程度的削减作用。在"晴朗微风"气象下,针阔混交林对PM₁的削减率显著高于阔叶混交林;在"雨后晴天"气象下,阔叶混交林对TSP和PM₁₀的削减率显著高于针阔混交林。在"阴天"和"雾霾"气象下,两种混交林对颗粒物的聚集程度都较高,针阔混交林显著高于阔叶混交林。更多还原

【Abstract】 The particulate matters of different sizes in the center,at the edge and outside of conifer-broadleaved mixed forest（ CBF） and broadleaved mixed forest（ BMF） of Tai’an City,Shandong Province,were observed in 2016-2017 in this study,and the effects of the two types of forests on particulate matters in different meteorological conditions were explored. The results show that the meteorological conditions significantly affect the role of roadside forests in particulate matters reduction. The concentration of particulate matters decreases from the roads to the outside of the forests in the sunny and breezy days or"sunny day after rain",but increases in cloudy and smog days. In the sunny and breezy days and "the sunny day after rain",the two types of roadside forests could reduce particulate matters to a certain extent. In the sunny and breezy days,CBF has significantly higher reduction rate of PM₁ than BMF. In the"sunny days after rain",the reduction rates of TSP and PM₁₀ in BMF are significantly higher than that in CBF. The concentration of particulate matters is higher in the both types of roadside forests in the cloudy and smoggy days,while the CBF has significantly higher concentration than the BMF. This indicates that meteorological conditions significantly affect the effect of roadside landscape forest on particulate matters reduction,and the reduction effects on particle matters of different sizes is not consistent.更多还原