【摘要】 采用2013年环境空气自动监测数据,分析杭州市空气中黑碳质量浓度的变化规律,并对变化特征的产生原因进行探讨。结果表明:黑碳测定年均值为4.10μg/m3,日变化有明显双峰结构,峰值出现在早7时和晚8时左右;从季节看,黑碳质量浓度冬季高(5.20μg/m3)、夏季低(3.00μg/m3);黑碳质量浓度与NO2、CO、PM10、PM2.5显著相关,与O3、风速、气温呈负相关,降水对黑碳的清除作用明显。更多还原

【Abstract】 Based on the automatic monitoring data in 2013,this paper analyzed the variation of black carbon(BC) concentration in the ambient air of Hangzhou,and discussed the factors causing the phenomenon.The results showed that the BC annual average value was 4.10 μg / m3.It was indicated an obvious double-peak pattern in the diurnal variation of BC level with peak appeared at 20: 00 and 7: 00.BC concentration in winter(5.20μg/m3) was much higher than that in summer(3.00μg/m3).BC concentration was significant associated with NO2、CO、PM10 and PM2.5,but negatively related to O3,wind speed and air temperature.Precipitation showed obvious scavenging ability for BC.更多还原