Hannover 2010 – scientific programme

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UP: Fachverband Umweltphysik

UP 6: Aerosols

UP 6.1: Talk

Wednesday, March 10, 2010, 17:45–18:00, M 11

Retrieval of stratospheric aerosol distributions from SCIAMACHY limb measurements: methodology and first results — •Florian Ernst, Christian von Savigny, Alexei Rozanov, Vladimir Rozanov, Heinrich Bovensmann, and John Burrows — Institute for Environmental Physics, University of Bremen, Germany

Stratospheric aerosols play an important role for the global radiation budget and for trace gas retrievals, especially ozone.

SAGE I to III provided a 25-year record of stratospheric aerosols by means of solar occultation technique. Since the demise of SAGE II and III in 2005/2006, no instrument with this technique provides a continuation of this data set. Goal of this work is to demonstrate that aerosol extinction profiles can be retrieved from SCIAMACHY limb scatter measurements to sustain the time series.

Since the eruption of Pinatubo in 1991 was the last large source of volcanic aerosols in the stratosphere, we have now the opportunity to retrieve background aerosol profiles. The radiative transfer model SCIATRAN is used to derive aerosol extinction profiles for SCIAMACHY limb data.

The algorithm, sensitivity studies and first results are presented here.