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| Characteristics and source apportionment of black carbon in the Yangtze River Delta Region of China |
| JING An-kang1, ZHU Bin1, DING De-ping2, ZHAO De-long2, YAN Shu-qi1, DAI Ming-ming1, WANG Yuan-min1, GUO Zhen-dong1, KANG Han-qing1 |
1. Key Laboratory of Meteorological Disaster, Ministry of Education, Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. Beijing Weather Modification Office, Beijing 100089, China |
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Abstract The characteristics and source of black carbon (BC) in the Yangtze River Delta region were analyzed combined with the data of meteorological factors and trace gases in Chongming Dongtan (DT, Shanghai), Pudong (PD, Shanghai), Shouxian (SX, Anhui Province), Linan (LA, Zhejiang Province) and Hongjia (HJ, Zhejiang Province) sites in 2016. The annual average mass concentration (±standard deviation) of BC in DT, PD, SX, LA and HJ sites were (834±1713), (2410±1537), (2823±1759), (2651±1518) and (2544±1399) ng/m3. The BC concentration is relatively low in DT and other sites are very similar. The mass concentration of BC showed a distinct seasonal variation in five sites. The BC concentration in DT site is higher in winter than in other seasons. The BC mass concentration in other sites ranked in the order of winter > spring > autumn > summer. The diurnal variations of DT site in four seasons were not obvious. However, the diurnal cycles in other sites were similar with the high values in rush hours (06:00~09:00, 18:00~21:00) in all seasons. The vehicle emissions and coal combustion were mainly sources of BC in PD, SX, LA and HJ sites. A low wind speed (<3m/s) occurred in all sites. Low BC concentration accompanied with the high wind speed. The highest BC mass concentration occurred when RH=50%~60%. The potential source contribution function (PSCF) analysis signified that the potential sources of all sites in winter and summer were mainly from Jiangsu, Anhui, Zhejiang Province and so on.
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Received: 02 March 2019
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