北京大学学报(自然科学版)

利用OMI卫星资料计算NO2地面浓度的方法研究

丁宇宇1,彭丽2,冉靓1,赵春生1   

  1. 1. 北京大学物理学院大气与海洋科学系, 北京100871; 2. 上海市气象局, 上海200030;
  • 收稿日期:2010-05-11 出版日期:2011-07-20 发布日期:2011-07-20

A Method of Inferring Ground Level NO2 Using Satellite-Borne OMI Observations

DING Yuyu1, PENG Li2, RAN Liang1, ZHAO Chunsheng1   

  1. 1. Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871; 2. Shanghai Meteorological Bureau, Shanghai 200030;
  • Received:2010-05-11 Online:2011-07-20 Published:2011-07-20

摘要: 利用OMI NO2卫星遥感数据, 分析了2006年5月至2008年8月上海市NO2对流层柱浓度, 提出了由对流层柱浓度计算NO2地面浓度的方法。由上海市徐家汇区实地观测的近地面NO2浓度数据, 结合全球大气化学传输模式MOZART-2, 得到经过订正的近地面NO2浓度, 并与柱浓度计算得到的NO2地面浓度进行了对比。结果显示, 由柱浓度计算得到的NO2地面浓度与实地观测NO2地面浓度月平均数据相关性为R2=0.88, 表明计算得到的NO2地面浓度与实地观测一致性较好, 能够准确反映地面污染情况, 由卫星遥感NO2对流层柱浓度计算NO2地面浓度的方法是可行的。

关键词: 二氧化氮, MOZART, OMI, 地面浓度, 对流层柱浓度

Abstract: Ground-level NO2 concentrations in Shanghai between May 2006 and August 2008 are estimated using the tropospheric NO2 column concentration data of Ozone Monitoring Instrument (OMI) onboard AURA. In-situ measurements of surface NO2 concentrations of Xujiahui, Shanghai are corrected using global 3-D chemical transport model MOZART-2, and are used to validate the surface NO2 concentrations derived from tropospheric columns. The results show a significant correlation between monthly mean OMI derived surface NO2 concentrations and in-situ NO2 surface concentrations (R2=0.88), indicating that it is reliable to infer ground-level NO2 concentration from NO2 tropospheric column concentration.

Key words: NO2, MOZART, OMI, surface concentratuion, tropospheric column concentration

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