摘要
为了解深圳市环境空气中黑碳气溶胶(BC)的污染状况及变化规律,2009年利用黑碳仪(aethalometer)对黑碳气溶胶组分进行了在线观测及来源分析研究。结果表明:大气环境中黑碳气溶胶质量浓度为5.72μg.m-3,占PM2.5的14.8%,且黑碳气溶胶浓度呈现冬高夏低、占PM2.5比例呈现夏高秋低的变化趋势。各季节BC浓度均具有显著的日变化,风向分析表明:静风时BC浓度较高,说明BC主要来自本地污染源;而区域污染传输发生时,东北方向的传输更易影响深圳市BC污染水平。
In 2009, for better understanding the pollution situation and change tendency of carbon （BC） aerosol in atmosphere of Shenzhen, BC concentrations were measured black with aethalometers, and its sources were analyzed as well. It was found that the average mass concentration of black carbon was 5.72 μg·m^-3, amounting 14.8% of the total PM25. BC concentration was higher in winter and lower in summer and its percentage in total PM25 was highest in summer and lowest in autumn. BC appeared to have a remarkable diurnal pattern in each season. Wind direction analysis showed that BC concentration was higher when the wind speed was low to nearly zero, which indicated local emissions was the main source of BC and the regional pollutants from northeast had greater influence on BC in Shenzhen when pollution transport occurred.
出处
《中国测试》
CAS
北大核心
2012年第3期8-11,共4页
China Measurement & Test
基金
国家自然科学基金项目(40805049)
关键词
黑碳气溶胶
污染特征
日变化
来源分析
黑碳仪
back carbon（BC）
pollution characteristics
diurnal
source analysis
aethalometer
