Abstract:The variation of black carbon (BC) concentration over urban and suburban areas of Lanzhou were analyzed using the BC observation data from the Semi-arid Climate and Environment Observatory of Lanzhou University (SACOL) from September 2010to August 2011. The results showed that the average BC concentration in urban area was much higher than that in suburban area. The diurnal variation showed a bimodal distribution with the maximum value at 08:00~10:00(Beijing Time), and the minimum around 16:00; the annual variations of monthly maximum frequency BC concentration in urban and suburban areas were similar, the minimums of BC were shown in May with the values of 1143and 932ng/m3 respectively, and the maximums were in January with their values of 10230 and 5063ng/m3 respectively; the weekly variation was more obviously in urban area than that in suburban area; BC concentration under the condition of dust event was lower than the daily average concentration in the same month.
李燕军, 张镭, 曹贤洁, 岳芸, 史晋森. 兰州城市和远郊区黑碳气溶胶浓度特征[J]. 中国环境科学, 2014, 34(6): 1397-1403.
LI Yan-Jun, ZHANG Lei, CAO Xian-Jie, YUE Yun, SHI Jin-Sen. Property of black carbon concentration over urban and suburban of Lanzhou. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(6): 1397-1403.