利用OMIN02卫星遥感数据,分析了2006年5月至2008年8月上海市N02对流层柱浓度,提出了由对流层柱浓度计算N02地面浓度的方法。由上海市徐家汇区实地观测的近地面N02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N02地面浓度与实地观测N02地面浓度月平均数据相关性为R^2=O.88,表明计算得到的N02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N02地面浓度的方法是可行的。
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