Insights into characteristics of carbonaceous particles during haze and fog events in Nanjing
HU Rui1,2, YIN Yan1,2, CHEN Kui2, WANG Hong-lei1,2, JIANG Hui2, ZHU Bin1,2, HAO Jian2
1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China
This study discussed the physicochemical properties of carbonaceous particles in Nanjing from August to September, 2014, using a real-time single particle aerosol mass spectrometry (SPAMS). Single carbonaceous particle mass spectra were grouped into 8types, including EC-fresh, EC-SN, NaK-EC, OC, ECOC, ECOC-S, ECOC-SN and Ammonium. The number fraction of OC in total particles decreased in fog and haze periods while EC-SN and NaK-EC showed the opposite trend, about 2times larger than clean episodes. The reduced rate of the total number fraction of carbonaceous particles in clean episodes > fog > haze.Most particles mixed with more nitrate in fog, meantime, more OC with small diameter were produced in these episodes. The relative acidity ratios (Rva) of EC-SN and NaK-EC in clean episodes < haze < fog, while for OC and ECOC-SN, the Rva reached the maximum during clean episodes. This study is important for further understanding of the sources and evolution of carbonaceous particles under different weather conditions in Nanjing.
胡睿, 银燕, 陈魁, 王红磊, 蒋惠, 朱彬, 郝囝. 南京雾、霾期间含碳颗粒物理化特征变化分析[J]. 中国环境科学, 2017, 37(6): 2007-2015.
HU Rui, YIN Yan, CHEN Kui, WANG Hong-lei, JIANG Hui, ZHU Bin, HAO Jian. Insights into characteristics of carbonaceous particles during haze and fog events in Nanjing. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(6): 2007-2015.
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