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Characteristics of Gaseous Pollutants at a Regional Background Station in Southern China |
CHAO Na1,2, JI Dong-Sheng1, CHEN Jia-Shan2,3, XIN Jin-Yuan2, HU Bo2, WANG Yue-Si1,2, WANG Hui1, MENG Ze4 |
1Gansu Agricultural University, Lanzhou 730070, China
2State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
3Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China
4South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China |
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Abstract Measurements of gaseous pollutants (O3, NOx, SO2, and CO) were conducted at Dinghushan background station in southern China from January to December 2013. The levels and variations of O3, NOx, SO2, and CO were analyzed and their possible causes discussed. The annual average concentrations of O3, NOx, SO2, and CO were 24.6 ± 23.9, 12.8 ± 10.2, 4.0 ± 4.8, and 348 ± 185 ppbv, respectively. The observed levels of the gaseous pollutants are comparable to those at other background sites in China. The most obvious diurnal variation of O3 was observed in autumn, with minima in the early morning and maxima in the afternoon. The diurnal variations of SO2 showed high values during the day. The diurnal cycles of NOx showed higher values in the morning and lower values during the night. Higher CO concentrations were observed in spring followed by winter, autumn, and summer. Biomass burning, in combination with the transport of regional pollution, is an important source of CO, SO2, and NOx in spring and winter. Backward trajectories were calculated and analyzed together with corresponding pollutant concentrations. The results indicate that air masses passing over polluted areas are responsible for the high concentrations of gaseous pollutants at the Dinghushan background station.
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Received: 28 January 2014
Revised: 26 February 2014
Accepted: 27 February 2014
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Corresponding Author:
JI Dong-Sheng
E-mail: jds@mail.iap.ac.cn
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Cite this article: |
CHAO Na, JI Dong-Sheng, CHEN Jia-Shan, XIN Jin-Yuan, HU Bo, WANG Yue-Si, WANG Hui, MENG Ze, 2014: Characteristics of Gaseous Pollutants at a Regional Background Station in Southern China . Atmos. Oceanic Sci. Lett., 7(4), 340-345, doi: 10.3878/j.issn.1674-2834.14.0007.
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URL: |
http://journal22.magtechjournal.com/Jwk_aosl/EN/10.3878/j.issn.1674-2834.14.0007 OR http://journal22.magtechjournal.com/Jwk_aosl/EN/Y2014/V7/I4/340 |
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