RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2015, Vol. 24 >> Issue (08): 1412-1417.doi: 10.11870/cjlyzyyhj201508021

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CHARACTERISTICS OF THE SURFACE OZONE AT SHANGRI-LA REGIONAL ATMOSPHERIC BACKGROUND STATION

LI Zou1,2, LIN Wei-li2,3, XU Xiao-bin2, ZHANG Wan-cheng4   

  1. 1. Diqing Meteorological Bureau, Yunnan province, Diqing 674400, China;
    2. Chinese Academy of Meteorological Sciences, Beijing 100081, China;
    3. Meteorological Observation Centre of China Meteorological Administration, Beijing 100081, China;
    4. Institute of Meteorological Sciences, Yunnan Province, Kunming 650034, China
  • Received:2014-10-24 Revised:2015-12-29 Online:2015-08-20
  • Contact: 张万诚 E-mail:hhzth@sina.com E-mail:hhzth@sina.com

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Abstract: The observation results of the surface ozone (O3) at Shangri-la regional atmospheric background station in 2009 were studied and the concentration level, the seasonal and diurnal variation, the affecting factors and the regional representativeness were presented. The monthly O3 at the station varied from 21.8 ppb to 57.7 ppb. The yearly average value was 38.0±12.1 ppb, with a peak value in spring (54.1 ppb) and a valley value in summer (28.0 ppb). The hours with the hourly concentration larger than 60 ppb and larger than 40 ppb accounted for 6.6% and 43.0% of the total observation hours, respectively. When compared with the observation results at the two regional atmospheric background stations with a similar latitude located in the eastern China, it showed a different diurnal and seasonal variation pattern of O3 at Shangri-la station, reflecting a unique ecosystem and environmental conditions surrounded. The airflow influencing the station is mainly from the southwest direction, which can be from as far as the northeast area in Bay of Bengal under a 3-days moving trajectory. The airflow coming from the south mainly occurred in summer-autumn period with a relatively lower ozone concentration and the airflow coming from the north mainly occurred in winter-spring period with a relatively higher ozone values.

Key words: regional background, ozone, Tibetan Plateau

CLC Number: 

  • TP79
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