München 2004 – scientific programme
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UP: Umweltphysik
UP 17: Poster: Atmosph
äre und Messtechnik
UP 17.4: Poster
Tuesday, March 23, 2004, 14:00–16:00, Schellingstr. 3
AMAXDOAS TROPOSPHERIC NO2 MEASUREMENT ON FALCON — •Ping Wang1, Marco Bruns1, Andreas Richter1, John P. Burrows1, Klaus-Peter Heue2, Irene Pundt2, Thomas Wagner2, and Ulrich Platt2 — 1Institute of Environmental Physics, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany — 2Institute of Environmental Physics, University of Heidelberg, In Neuenheimer Feld 229, 69120 Heidelberg, Germany
The AMAXDOAS instrument on the DLR Falcon participated in the SCIAVAL campaign in September 2002 and February, March 2003. The AMAXDOAS instrument is a UV/visible spectrometer observing scattered light in four different directions: zenith, nadir, zenith off-axis and nadir off-axis. From the spectra, columns can be retrieved for several trace gases including BrO, OClO, NO2, and O3 using the well known DOAS (Differential Optical Absorption Spectroscopy) method. Large NO2 column enhancements are measured in nadir direction over Europe during some flights in 2002 and 2003. In this presentation we will describe the instrument and data analysis briefly. The NO2 slant columns are interpreted using fitting windows at different wavelengths and different viewing directions. Tropospheric NO2 AMFs are calculated with the radiative transport model SCIATRAN. Tropospheric NO2 vertical columns derived from the difference of zenith and nadir measurements will be presented and compared to measurements from the GOME and SCIAMACHY satellite instruments.