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Polar Mesospheric Cloud Particle Size Retrieval from GOMOS / ENVISAT Observations

Kristell Pérot 1 Alain Hauchecorne 2 Franck Montmessin 3 Jean-Loup Bertaux 2 
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
Abstract : GOMOS (Global Ozone Monitoring by Occultation of Stars) is a stellar occultation instrument, combining four spectrometers and two fast photometers, that flew on board the European platform ENVISAT from 2002 to 2012. Polar mesospheric clouds (PMCs), that form during summer in the polar upper mesosphere, could be detected using the photometers' signals. Their main properties (occurrence frequency, peak altitude, radiance) have been retrieved from 2002 to 2010, leading to a 16-summer (in both hemispheres) database of more than 21000 clouds. PMCs are very sensitive to changes in their environment. That makes them important tracers for the complex mechanisms that control the summer mesopause region. A better understanding of the microphysical processes going on in this atmospheric region is essential in order to model of their growth, their transport mechanisms and their lifetime. To that purpose, the particle size distribution is an important parameter. This presentation will be focused on PMC particle sizes retrieved from GOMOS spectral observations in the northern hemisphere. The retrieval method will be explained, and results based on the obtained 8-year dataset will be described and compared to PMC particle sizes derived from the measurements of other instruments.
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Submitted on : Wednesday, June 3, 2015 - 3:02:32 PM
Last modification on : Tuesday, November 16, 2021 - 4:48:30 AM


  • HAL Id : insu-01159665, version 1


Kristell Pérot, Alain Hauchecorne, Franck Montmessin, Jean-Loup Bertaux. Polar Mesospheric Cloud Particle Size Retrieval from GOMOS / ENVISAT Observations. ATMOS 2015. Advances in Atmospheric Science and Applications, Jun 2015, Heraklion, Greece. Paper 121. ⟨insu-01159665⟩



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