| 南京市不同季节大气亚微米颗粒物化学组分在线观测研究 |
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| 引用本文： | 胡丙鑫,汤莉莉,张宁红,张运江,蒋磊,崔玉航,花艳,杨笑笑.南京市不同季节大气亚微米颗粒物化学组分在线观测研究[J].环境科学学报,2017,37(3):853-862. |
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| 作者姓名： | 胡丙鑫 汤莉莉 张宁红 张运江 蒋磊 崔玉航 花艳 杨笑笑 |
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| 作者单位： | 1. 南京信息工程大学江苏省大气环境与装备技术协同创新中心, 南京 210044;2. 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044,1. 南京信息工程大学江苏省大气环境与装备技术协同创新中心, 南京 210044;3. 江苏省环境监测中心, 南京 210036,江苏省环境保护厅, 南京 210036,1. 南京信息工程大学江苏省大气环境与装备技术协同创新中心, 南京 210044;5. INERIS, Verneuil en Halatte 60550;6. Laboratoire des Sciences du Climat et l''Environnement, CNRS-CEA-UVSQ, Gif sur Yvette 91191,1. 南京信息工程大学江苏省大气环境与装备技术协同创新中心, 南京 210044;2. 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044,1. 南京信息工程大学江苏省大气环境与装备技术协同创新中心, 南京 210044;2. 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044,1. 南京信息工程大学江苏省大气环境与装备技术协同创新中心, 南京 210044;2. 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044,1. 南京信息工程大学江苏省大气环境与装备技术协同创新中心, 南京 210044;2. 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044 |
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| 基金项目： | 国家自然科学基金重大研究计划（No.D0512，91544231）；江苏省环保科研课题（No.2015017）；江苏省环境监测科研基金项目（No.1016，1202）共同资助 |
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| 摘 要： | 本研究利用Aerodyne气溶胶化学组分监测仪在典型冬季重污染(12月)和夏季(8月)时期分别对南京城市大气非难熔性亚微米细颗粒物(NR-PM1)进行连续在线观测.结果表明,NR-PM1的组分平均贡献为(8月,12月):有机物(51.8%,44%)、硝酸盐(12.8%,23%)、硫酸盐(20.9%,13%)、铵盐(14%,16.8%)、氯化物(0.5%,3.2%).硝酸盐和硫酸盐在8月和12月呈现不同的日变化,如硝酸盐在12月白天呈现增加趋势,表明白天光化学作用对硝酸盐形成起主导作用;12月高浓度的硫酸盐在较高相对湿度的夜间被观测到,而8月在午后出现峰值,这表明在12月和8月硫酸盐的形成可能分别被液相生成和气相光化学作用驱动.8月臭氧污染期间,硝酸盐通过非均相反应在夜间快速形成,日出后,SO_2-4和氧化态有机气溶胶(OOA)同时增加表明二次气溶胶的形成;12月霾污染期间,二次无机组分和具有较高氧化度的OOA逐渐增加.
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| 关 键 词： | ACSM 大气亚微米颗粒物 日变化 相对湿度 |
| 收稿时间： | 2016/5/13 0:00:00 |
| 修稿时间： | 2016/7/26 0:00:00 |
On-line measurements of atmospheric submicron aerosol particle composition during different seasons in Nanjing |
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| HU Bingxin,TANG Lili,ZHANG Ninghong,ZHANG Yunjiang,JIANG Lei,CUI Yuhang,HUA Yan and YANG Xiaoxiao.On-line measurements of atmospheric submicron aerosol particle composition during different seasons in Nanjing[J].Acta Scientiae Circumstantiae,2017,37(3):853-862. |
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| Authors: | HU Bingxin TANG Lili ZHANG Ninghong ZHANG Yunjiang JIANG Lei CUI Yuhang HUA Yan and YANG Xiaoxiao |
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| Institution: | 1. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044;2. Jiangsu Key Laboratory of Atmospheric Environmental Monitoring and Pollution Control, Nanjing 210044,1. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044;3. Jiangsu Environmental Monitoring Center, Nanjing 210036,Jiangsu Department of Environmental Protection, Nanjing 210036,1. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044;5. INERIS, Verneuil en Halatte 60550;6. Laboratoire des Sciences du Climat et l''Environnement, CNRS-CEA-UVSQ, Gif sur Yvette 91191,1. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044;2. Jiangsu Key Laboratory of Atmospheric Environmental Monitoring and Pollution Control, Nanjing 210044,1. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044;2. Jiangsu Key Laboratory of Atmospheric Environmental Monitoring and Pollution Control, Nanjing 210044,1. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044;2. Jiangsu Key Laboratory of Atmospheric Environmental Monitoring and Pollution Control, Nanjing 210044 and 1. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044;2. Jiangsu Key Laboratory of Atmospheric Environmental Monitoring and Pollution Control, Nanjing 210044 |
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| Abstract: | Real-time compositional measurements of atmospheric submicron aerosol particle (NR-PM1) were conducted in urban Nanjing during heavy pollution episodes in December and August 2013 using an Aerodyne Aerosol Chemical Speciation Monitor. NR-PM1 compositions were organics (51.8% and 44%), nitrate (12.8% and 23%), sulfate (20.9% and 13%), ammonium (14% and 16.8%), and chloride (0.5% and 3.2%) in December and August, respectively. The secondary inorganic aerosols, e.g., sulfate and nitrate, showed quite different diurnal variations in December and August. For example, nitrate presented a gradual increase during daytime in December, suggesting that daytime photochemistry played a more important role in nitrate formation. The high concentration of sulfate was mainly observed under highly relative humidity (RH) conditions during nighttime in December, but it showed a significant noon peak during daytime in August. This means that the sulfate formation might be driven by RH-dependent pathway in December and gas-phase photochemical processing in August, respectively. During ozone pollution episodes in August, oxygenated OA (OOA) showed a significant enhancement along with sulfate during daytime, indicating regional influence on secondary aerosol formation. Both secondary inorganic and OOA presented a significant enhancement during heavy pollution episodes in December, highlighting the importance of regional secondary aerosols in the formation of severe pollution episodes in Nanjing. |
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| Keywords: | ACSM atmospheric submicron aerosol particle diurnal variations relative humidity (RH) |
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