北京大学学报（自然科学版）

利用卫星数据和全球大气化学传输模式研究中国东部大城市对流层NO2季节变化原因

岳捷,林云萍,邓兆泽,赵春生   

  1. 北京大学物理学院大气科学系，北京100871；
  • 收稿日期:2008-04-18 出版日期:2009-05-20 发布日期:2009-05-20

Seasonal Variations of Tropospheric NO2 over Megalopolis in Eastern China Using Satellite Remote-Sensing Data and Chemistry-Transport Model

YUE Jie, LIN Yunping, DENG Zhaoze, ZHAO Chunsheng   

  1. Department of Atmospheric Science，School of Physics，Peking University，Beijing 100871；
  • Received:2008-04-18 Online:2009-05-20 Published:2009-05-20

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摘要： 利用卫星观测数据(GOME和SCIAMACHY)分析了1996年3月至2008年3月中国地区对流层NO2的分布特征和选定地区对流层NO2的变化趋势，并结合大气化学传输模式（MOZART-2）对中国东部大城市上空对流层NO_2显著季节变化的原因进行了分析。研究发现：1）中国地区对流层NO2高值区主要分布在京津冀地区、长江三角洲和珠江三角洲；中国东部污染地区对流层NO2呈现显著的增长趋势，年平均增长值达到0.9×1015cm-2。2）中国东部大城市上空对流层NO_2存在明显的季节变化，原因是OH对于对流层NO2的有效清除机制，对流层NO2在冬季出现高值，夏季迅速降低至一年中最低值；在以自然排放源为主的中国西部背景地区，对流层NO2则呈现明显的夏季高冬季低的特征。

关键词: GOME, SCIAMACHY, MAZART-2, 对流层NO_2

Abstract: Spatial distributions of tropospheric NO2 over China and variations of tropospheric NO2 for selected regions in China are studied using of satellite monitoring data (GOME and SCIAMACHY) from March 1996 to March 2008. Global Chemistry-Transport Model (MOART-2) simulation is carried out to reveal significant seasonal variations of tropospheric NO2 over megalopolis areas in eastern China. Results show that: 1) Maximum distribution of tropospheric NO2 lies in region of Beijing-Hebei-Tianjing, Yangtze Delta, Perl river delta. Obvious increasing trend can be seen over East China, with a yearly increasing rate of 0.9×1015cm-2. 2) Becacuse of effective eliminating of NO2 by OH, tropospheric NO2 over megalopolis in East China shows significant seasonal variations: tropospheric NO2 maximum appears in winter, and decreases sharply in summer. In background area West China where natural emissions dominates, tropospheric NO2 shows reversed phenomenon compared to the East.

Key words: GOME, SCIAMACHY, MOZART-2, troposphere NO_2

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