Dresden 2011 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 1: Poster Session

UP 1.7: Poster

Dienstag, 15. März 2011, 18:30–20:30, P2

Trends, quasi-biennial, annual, and semi-annual oscillations in stratospheric SCIAMACHY O3, NO2, and BrO limb data using a multivariate least squares approach — •Sebastian Dikty¹, Mark Weber¹, Christian vo Savigny¹, Alexei Rozanov¹, Sebastian Mieruch^{1, 2}, and John P. Burrows¹ — ¹Institut für Umweltphysik, Universität Bremen — ²Deutscher Wetterdienst, Offenbach

We use the latest version of SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) O3, NO2, and BrO limb profile data (2003-2008) to quantify the amplitudes of the quasi-biennial (QBO), annual (AO), and semi-annual (SAO) oscillation with the help of a simple multivariate regression model. Results are shown for O3 from 20-50 km altitude, 12-45 km for NO2, and 11-33 km for BrO. The analysis is being carried out with SCIAMACHY data covering all latitudes with the exception of the polar region, where continuous measurements are not available. The overall global yield is approximately 10,000 profiles per month, which are binned into 5°-steps with one zonal mean profile being calculated per month and latitude bin. Our results are compared to results from a similar analysis done with SABER ozone data for the same observational period. We use nighttime SABER ozone in order to avoid artificial signals due to the non-sun synchronous orbit of the TIMED satellite. In addition, total ozone (TOZ) trends in SCIAMACHY data time series are being investigated with respect to the question whether or not trends in the lower stratosphere (from the profiles) are similar to trends in TOZ.