Abstract:A prolonged heavy haze event occurred in Shijiazhuang, Hebei province, China, from December 5th to 27th, 2013. The visibilities variates from 0.2 to 8 km and there are approximately 89.53% days with visibility lower 5 km during this period. The aethalometer for measuring black carbon was deployed in the 2nd Institute of Surveying and Mapping of Hebei Province, and the data showed that, 1) the averaged black carbon mass concentration (CBC) was 39.84μg/m3; 2) the diurnal variation presented a bimodal distribution with the first peak at 01:00 (UTC Time) and the second peak at 13:00~16:00; (UTC Time) 3) a negative correlation can be observed between hourly averaged CBC and hourly averaged visibility; 4) the probability of occurrence of serve haze hours was 97.78% when the CBC was higher than the averaged CBC. In addition to the fixed station measurements, mobile measurements were conducted on the main roads in Shijiazhuang downtown for several days, using a car which was equipped with an aethalometer and a GPS receiver. The results showed that the CBC was obviously related to the traffic density and street characteristics (road type and traffic density). The CBC over the 2nd ring road was 1.48times higher than that within the 2nd ring road. The CBC over downtown areas was lower and presented a significance difference between south, north direction.
胡明玉, 秦凯, 白杨, 王润峰, 周阳. 2013年12月石家庄一次霾天气过程中的黑炭浓度特征[J]. 中国环境科学, 2015, 35(9): 2585-2593.
HU Ming-Yu, QIN Kai, BAI Yang, WANG Run-Feng, ZHOU Yang. Characteristics of black carbon concentration in Shijiazhuang under haze weather conditions during December, 2013. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(9): 2585-2593.