Berlin 2014 – wissenschaftliches Programm
UP 10.1: Vortrag
Mittwoch, 19. März 2014, 14:15–14:30, MAG 100
Stratospheric aerosol profile retrievals from SCIAMACHY limb-scatter observations: current results — •Christian von Savigny1, Lena Brinkhoff2, Florian Ernst2, Alexei Rozanov2, Rene Hommel2, and John Burrows2 — 1Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, Greifswald — 2Institut für Umweltphysik, Universität Bremen, Bremen
Stratospheric aerosol extinction profiles in the visible spectral range are retrieved from limb-scatter observations with the SCIAMACHY instrument on Envisat from fall 2002 until spring 2012. The retrievals are performed with a colour-index approach in combination with an iterative scheme and the SCIATRAN radiative transfer model. The aerosol extinction profiles agree globally to within about 15% with co-located SAGE II (vs. 7.0) solar occultation measurements. This contribution presents current results on decadal trends and spatial/temporal variability in stratospheric aerosol extinction caused by different processes. A main feature is the more of less continuous increase in stratospheric aerosol optical depth from 2003 to 2012, which appears to be a consequence of a series of small volcanic eruptions.