München 2004 – scientific programme

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UP: Umweltphysik

UP 17: Poster: Atmosph
äre und Messtechnik

UP 17.2: Poster

Tuesday, March 23, 2004, 14:00–16:00, Schellingstr. 3

Multi-axis DOAS observations of atmospheric trace gases at the Greenland ice cap — •Thomas Medeke, Sixten Fietkau, Annette Ladstaetter- Weissenmayer, Hilke Oetjen, Andreas Richter, Folkard Wittrock, and John Burrows — University of Bremen, IUP, Otto- Hahn- Allee 1, 28359 Bremen

In July 2003 a new MAX- DOAS instrument has been installed at Summit (Greenland). MAX-DOAS is based on the well-known UV/VIS instruments, which use the sunlight scattered in the zenith sky as the light source and the method of Differential Optical Absorption Spectroscopy (DOAS) to derive column amounts of absorbers like ozone and nitrogen dioxide. Substantial enhancements have been applied to this standard setup to use different line of sights near to the horizon as additional light sources (MAX - multi axis). In addition, this measurement technique can be used for both ground based observations (e.g. Network for Detection of Stratospheric Change - NDSC) and validation of satellite instruments (e.g. Global Ozone Monitoring Experiment - GOME, Scanning Imaging Absorption Spectrometer for Atmospheric Chartography - SCIAMACHY) which allows to combine highly time and spatial resolved data of selected locations with data of global coverage. First results from measurements at the Summit part of the BREDOM (Bremian DOAS Network for Atmospheric Measurements) will be presented and interpreted with the full-spherical radiation transport model SCIATRAN.