The in-situ measurement of atmospheric hydrofluorocarbons (HFCs) at the Shangdianzi Regional Background Station in Beijing
XIE Wen-qi1,2, YAO Bo1,3, QUAN Wei-jun4,5, FANG Shuang-xi3, MA Zhi-qiang4, ZHOU Huai-gang4,5, DONG Fan4,5, ZHOU Li-yan4,5, HE Di4,5, SHI Qing-feng4,5, CHEN Li-qu3
1. College of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. Nanchang County Meteorological Bureau, Nanchang 330200, China;
3. Meteorological Observation Center of China Meteorological Administration, Beijing 100081, China;
4. Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing 100089, China;
5. Beijing Shangdianzi Regional Atmosphere Watch Station, Beijing 101500, China
A gas chromatograph/mass spectrometer (GC/MS) system was used for in-site measurements of atmospheric hydrofluorocarbons (HFCs) at the Shangdianzi Regional Background Station from January 2018 to December 2018. The background mixing ratios of HFC-23, HFC-32, HFC-125, HFC-134a, HFC-143a, HFC-152a, HFC-227ea, HFC-236fa, HFC-245fa, HFC-365mfc and HFC-4310mee were (31.9±0.4)×10-12, (22.1±1.7)×10-12, (29.3±1.3)×10-12, (110.2±2.4)×10-12, (24.0±0.3)×10-12, (10.3±0.7)×10-12, (1.59±0.04)×10-12, (0.19±0.01)×10-12, (3.30±0.08)×10-12, (1.27±0.03)×10-12, (0.28±0.01)×10-12, respectively, while the polluted mixing ratios were (39.2±11.1)×10-12, (47.7±21.8)×10-12, (38.6±8.7)×10-12, (137.3±15.7)×10-12, (26.1±2.2)×10-12, (15.9±7.0)×10-12, (2.77±1.11)×10-12, (0.25±0.06)×10-12, (4.10±0.97)×10-12, (1.34±0.06)×10-12, (0.30±0.01)×10-12. Background conditions occurred for 34.5%, 23.4%, 22.5%, 24.6%, 24.5%, 42.5%, 24.3%, 46.4%, 38.3%, 68.1%, 77.9% of all measurements for the 11HFCs. The background mixing ratios of HFC-32、HFC-125、HFC-134a、HFC-143a、HFC-227ea exhibited a linear increasing trend at 4.4×10-12, 3.8×10-12, 7.3×10-12, 1.0×10-12, 0.14×10-12a-1, while HFC-152a background data showed a strong seasonal variation. A tracer-radio method was applied to estimate the emissions of HFC-23, HFC-32, HFC-125, HFC-134a, HFC-152a, HFC-236fa, HFC-245fa emissions using CO as a tracer. Chinese emissions of the HFCs mentioned above were 6.4,17,14,27,4.0,0.10 and 1.3kt/a in 2018.
谢文琪, 姚波, 权维俊, 方双喜, 马志强, 周怀刚, 董璠, 周礼岩, 何迪, 石庆峰, 陈丽曲. 北京上甸子大气本底站氢氟碳化物在线观测研究[J]. 中国环境科学, 2019, 39(12): 4941-4949.
XIE Wen-qi, YAO Bo, QUAN Wei-jun, FANG Shuang-xi, MA Zhi-qiang, ZHOU Huai-gang, DONG Fan, ZHOU Li-yan, HE Di, SHI Qing-feng, CHEN Li-qu. The in-situ measurement of atmospheric hydrofluorocarbons (HFCs) at the Shangdianzi Regional Background Station in Beijing. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(12): 4941-4949.
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