摘要
Variation in concentrations of the airborne particulate matters(PM)in three kinds of typical recreation forests in Baiwang Mountain,West Mountain area of Beijing were observed day and night in spring.Results showed that:1)Diurnal variations of PM concentrations in three kinds of typical recreation forests in West Mountain of Beijing area in spring were all synchronous.Curves of diurnal variation of PM concentrations had two peaks and two vales,and two peaks presented at 7:00-9:00 and 21:00-1:00,and two vales presented at 15:00 and 3:00-5:00 respectively.In addition,the larger proportion finer particles took the heavier total particles were in a day;2)Comparatively,peaks in day and vales at night of finer particles presented earlier than that of coarser particles,however the peaks at night were later;3)Weather conditions had influences on PM,and the finer particles were more sensitive to the conditions than the coarse particles.In general,PM concentration was higher at the state of low air temperature,high air relative humidity and soft wind.They also increased at cloudy night,especially for finer particles.
Variation in concentrations of the airborne particulate matters（PM） in three kinds of typical recreation forests in Baiwang Mountain, West Mountain area of Beijing were observed day and night in spring. Results showed that： 1 ） Diurnal variations of PM concentrations in three kinds of typical recreation forests in West Mountain of Beijing area in spring were all synchronous. Curves of diurnal variation of PM concentrations had two peaks and two vales, and two peaks presented at 7：00 - 9：00 and 21：00 - 1：00, and two vales presented at 15：00 and 3：00 - 5：00 respectively. In addition, the larger proportion finer particles took the heavier total particles were in a day; 2） Comparatively, peaks in day and vales at night of finer particles presented earlier than that of coarser particles, however the peaks at night were later; 3） Weather conditions had influences on PM, and the finer particles were more sensitive to the conditions than the coarse particles. In general, PM concentration was higher at the state of low air temperature, high air relative humidity and soft wind. They also increased at cloudy night, especially for finer particles.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2009年第6期145-148,共4页
Scientia Silvae Sinicae
基金
国家“十一五”攻关重大专项课题(2006BAD03A06)
关键词
游憩林
空气颗粒物
春季
日变化
北京西山
recreation forest
airborne particulate matter
spring
diurnal variation
West Mountain of Beijing area
