17 Nov 2008
17 Nov 2008
Validation of OMI tropospheric NO2 column data using MAX-DOAS measurements deep inside the North China Plain in June 2006: Mount Tai Experiment 2006
H. Irie1, Y. Kanaya1, H. Akimoto1, H. Tanimoto2, Z. Wang3, J. F. Gleason4, and E. J. Bucsela5
H. Irie et al.
H. Irie1, Y. Kanaya1, H. Akimoto1, H. Tanimoto2, Z. Wang3, J. F. Gleason4, and E. J. Bucsela5
- 1Frontier Research Center for Global Change, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama, Kanagawa 236-0001, Japan
- 2National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
- 3LAPC/NZC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
- 4Atmospheric Chemistry and Dynamics branch, NASA Goddard Space Flight Center, Greenbelt, MD 20771-0000, USA
- 5SRI International, Menlo Park, CA 94107, USA
- 1Frontier Research Center for Global Change, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama, Kanagawa 236-0001, Japan
- 2National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
- 3LAPC/NZC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
- 4Atmospheric Chemistry and Dynamics branch, NASA Goddard Space Flight Center, Greenbelt, MD 20771-0000, USA
- 5SRI International, Menlo Park, CA 94107, USA
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A challenge for the quantitative analysis of tropospheric nitrogen dioxide (NO2) column data from satellite observations is posed partly by the lack of satellite-independent observations for validation. We performed such observations of the tropospheric NO2 column using the ground-based Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) technique in the North China Plain (NCP) from 29 May to 29 June, 2006. Comparisons between tropospheric NO2 columns measured by MAX-DOAS and the Ozone Monitoring Instrument (OMI) onboard the Aura satellite indicate that OMI data (the standard product, version 3) over NCP may have a positive bias of 1.6×1015 molecules cm−2 (20%), yet within the uncertainty of the OMI data. Combining these results with literature validation results for the US, Europe, and Pacific Ocean suggests that a bias of +20%/−30% is a reasonable estimate, accounting for different regions.
