Atmos. Chem. Phys. Discuss., 4, 7541-7559, 2004
www.atmos-chem-phys-discuss.net/4/7541/2004/
doi:10.5194/acpd-4-7541-2004
© Author(s) 2004. This work is licensed under the
Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
Review Status
This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Measurements of tropospheric NO2 with an airborne multi-axis DOAS instrument
P. Wang1, A. Richter1, M. Bruns1, V. V. Rozanov1, J. P. Burrows1, K.-P. Heue2, T. Wagner2, I. Pundt2, and U. Platt2
1Institute of Environmental Physics, University of Bremen, Germany
2Institute of Environmental Physics, University of Heidelberg, Germany

Abstract. The AMAXDOAS instrument is an airborne multi-axis DOAS instrument covering the spectral range from 300 to 600 nm. During one flight of the SCIAVALUE campaign on 19 March 2003, the AMAXDOAS onboard the DLR Falcon detected tropospheric NO2 over Europe under both cloudy and cloud free conditions. By combining the measurements in nadir and zenith direction, and analysing the spectra in the UV and the visible spectral region, information was derived on where the bulk of the observed NO2 was located. Vertical columns of up to 5.7×1016 molec cm-2 were observed close to Frankfurt, in good agreement with surface measurements of 16.4 ppb. On several occasions, strong tropospheric NO2 signals were also detected when flying above clouds. The ratio of zenith and nadir measurements indicates that the NO2 observed was located within the cloud, and assuming the same profile as for the cloud free situation the NO2 vertical column was estimated to be 5.0×1016 molec cm-2. The results are relevant for the retrieval of tropospheric NO2 columns from space-borne instruments in cloudy situations.

Citation: Wang, P., Richter, A., Bruns, M., Rozanov, V. V., Burrows, J. P., Heue, K.-P., Wagner, T., Pundt, I., and Platt, U.: Measurements of tropospheric NO2 with an airborne multi-axis DOAS instrument, Atmos. Chem. Phys. Discuss., 4, 7541-7559, doi:10.5194/acpd-4-7541-2004, 2004.
 
Search ACPD
Discussion Paper
    XML
    Citation
    Final Revised Paper
    Share