作者：孙杰¹, 孙天乐², 何凌燕²

作者单位：1. 深圳市环境监测中心站, 广东 深圳 518049;
2. 北京大学深圳研究生院环境与能源学院城市人居环境科学与技术实验室, 广东 深圳 518055

关键词：黑碳气溶胶; 污染特征; 日变化; 来源分析; 黑碳仪

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5.72 gm-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。

Pollution characteristics of black carbon aerosol in ambient air of Shenzhen

SUN Jie¹, SUN Tian-le², HE Ling-yan²

1. Shenzhen Environment Monitoring Center, Shenzhen 518049, China;
2. Key Laboratory for Urban Habitat Environmental Science and Technology, Shenzhen Graduat School of Peking University, Shenzhen 518055, China

Abstract: In 2009, for better understanding the pollution situation and change tendency of black carbon(BC) aerosol in atmosphere of Shenzhen, BC concentrations were measured 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 PM_2.5. BC concentration was higher in winter and lower in summer and its percentage in total PM_2.5 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.

Keywords: back carbon(BC); pollution characteristics; diurnal; source analysis; aethalometer

2012, 38(3): 8-11  收稿日期: 2011-9-15;收到修改稿日期: 2011-12-7

基金项目: 国家自然科学基金项目(40805049)

作者简介: 孙杰(1955-),男,山西平遥市人,高级工程师,主要从事环境质量监测工作。

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