Erlangen 2018 – scientific programme
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UP: Fachverband Umweltphysik
UP 8: Methods - measurement techniques; Atmosphere - trace gases, mesosphere
UP 8.4: Talk
Wednesday, March 7, 2018, 14:45–15:00, G 1.011
Retrieval of the O2(1Σ) and O2(1Δ) volume emission rate and temperature in the mesosphere and lower thermosphere using SCIAMACHY MLT limb scans — •Amirmahdi Zarboo1, Stefan Bender2, Miriam Sinnhuber1, John P. Burrows3, and Johannes Orphal1 — 1Karlsruhe Institute of Technology, Karlsruhe, Germany — 2Norwegian University of Science and Technology, Trondheim, Norway — 3University of Bremen, Bremen, Germany
We present the retrieved volume emission rates (VERs) from airglow of the daytime and twilight O2(1Σ) and O2(1Δ) band emissions in the visible (811–595 nm) and near infrared (1200–1360 nm) and the retrieved temperature from daytime O2(1Σ) emission in the mesosphere and lower thermosphere (MLT). SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) on-board European Space Agency Envisat satellite observes up-welling radiation in the limb viewing geometry with its special MLT mode in the 50 to 150 km altitude range. We analyze the daily averaged latitude distributions and the time series of the retrieved VERs in the altitude range from 53 to 149 km and the retrieved temperatures in the altitude range from 80 to 120 km. The O2(1Σ) VER peaks are observed at about 90 km altitude, while O2(1Δ) VER emissions are observed to decrease with altitude, with the largest values at the lowest edge of the observations (about 53 km). Comparisons of the temperature retrievals with other satellite instruments are made. We do some sensitivity tests of the temperature retrievals in order to investigate the variations due to different parameters as well.