| 深圳市冬季黑碳气溶胶的粒径分布和混合态特征 |
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| 引用本文： | 孙天乐,何凌燕,黄晓锋,曾立武,胡敏,张远航.深圳市冬季黑碳气溶胶的粒径分布和混合态特征[J].科学通报,2011,56(21):1703-1710. |
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| 作者姓名： | 孙天乐 何凌燕 黄晓锋 曾立武 胡敏 张远航 |
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| 作者单位： | 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重点实验室;北京大学环境科学与工程学院环境模拟与污染控制国家重点联合实验室; |
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| 基金项目： | 国家自然科学基金(40805049); 科技部国际科技合作与交流项目(2010DFA22770); 北京大学环境模拟与污染控制国家重点联合实验室开放基金资助 |
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| 摘 要： | 黑碳(BC)气溶胶的气候效应和环境效应是当今科学界的研究热点. BC 气溶胶的粒径分布及混合态对其光吸收和其他理化性质有很大影响, 但是受仪器分析技术的限制, 目前国内外均鲜有对单个BC 粒子大小及混合态连续观测的研究. 本研究利用新型的单颗粒黑碳光度计(SP2), 对2009 年1~2 月深圳市BC 气溶胶的质量浓度、粒径分布及单颗粒混合态进行连续在线观测. 结果表明: 观测期间BC浓度均值为6.24 μg/m3; 其质量粒径分布呈单峰型, 峰值位于211 nm; 内混态BC(127~264 nm 粒径段内)质量比例为32.4%. 内混态BC 比例随粒径变化趋势与表面积浓度的粒径分布趋势相似, 说明内混态BC 形成与大气中的气-固转化过程密切相关. 外混态BC 浓度与NOx 高度相关, 并随大气边界层高度变化而呈现白天低、夜间高, 这些特征都说明外混态BC 与本地机动车等燃烧源的新鲜排放密切相关; 内混态BC 浓度的日变化相对平缓, 指示出其来自区域传输的特征. 反向轨迹分析也表明, 内混态BC 比例与气团老化程度有显著的对应关系. 本研究有助于深入认识我国大气BC 气溶胶污染的本质及来源特征, 并为准确评估BC 气溶胶在辐射强迫和气候变化中的作用提供关键的支撑数据.
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| 关 键 词： | 黑碳(BC) 单颗粒黑碳光度计(SP2) 粒径分布 混合态 |
| 收稿时间： | 2011-01-31 |
Characteristics of the size distribution and mixing state of black carbon aerosol in Shenzhen in winter |
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| SUN TianLe,HE LingYan,HUANG XiaoFeng,ZENG LiWu,HU Min,ZHANG YuanHang Key Laboratory for Urban Habitat Environmental Science , Technology,School of Environment , Energy,Peking University Shenzhen Graduate School,Shenzhen ,China, State Key Joint Laboratory of Environmental Simulation , Pollution Control,College of Environmental Sciences , Engineering,Peking University,Beijing.Characteristics of the size distribution and mixing state of black carbon aerosol in Shenzhen in winter[J].Chinese Science Bulletin,2011,56(21):1703-1710. |
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| Authors: | SUN TianLe HE LingYan HUANG XiaoFeng ZENG LiWu HU Min ZHANG YuanHang Key Laboratory for Urban Habitat Environmental Science Technology School of Environment Energy Peking University Shenzhen Graduate School Shenzhen China State Key Joint Laboratory of Environmental Simulation Pollution Control College of Environmental Sciences Engineering Peking University Beijing |
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| Institution: | SUN TianLe1,HE LingYan1,HUANG XiaoFeng1,ZENG LiWu1,HU Min2,ZHANG YuanHang2 1 Key Laboratory for Urban Habitat Environmental Science and Technology,School of Environment and Energy,Peking University Shenzhen Graduate School,Shenzhen 518055,China,2 State Key Joint Laboratory of Environmental Simulation and Pollution Control,College of Environmental Sciences and Engineering,Peking University,Beijing 100871 |
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| Abstract: | The climatic and environmental effects of black carbon (BC) aerosol have recently become a hot research topic for the international scientific community. The size distribution and mixing state of BC have an important effect on radiative and other physicochemical properties of BC. However, there have been few measurements of the size distribution and mixing state of BC because of the limitations of analytical technology. Here, using a newly developed single-particle soot photometer (SP2), we studied the BC m... |
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| Keywords: | black carbon single-particle soot photometer (SP2) size distribution mixing state |
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