Articles | Volume 7, issue 10
Atmos. Meas. Tech., 7, 3233–3246, 2014
https://doi.org/10.5194/amt-7-3233-2014
Atmos. Meas. Tech., 7, 3233–3246, 2014
https://doi.org/10.5194/amt-7-3233-2014

Research article 01 Oct 2014

Research article | 01 Oct 2014

Retrieval of cirrus cloud optical thickness and top altitude from geostationary remote sensing

S. Kox1,*, L. Bugliaro1, and A. Ostler2 S. Kox et al.
  • 1Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
  • 2Karlsruher Institut für Technologie, Institut für Meteorologie und Klimaforschung (IMK-IFU), Garmisch-Partenkirchen, Germany
  • *now at: European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), Darmstadt, Germany

Abstract. A novel approach for the detection of cirrus clouds and the retrieval of optical thickness and top altitude based on the measurements of the Spinning Enhanced Visible and Infrared Imager (SEVIRI) aboard the geostationary Meteosat Second Generation (MSG) satellite is presented. Trained with 8 000 000 co-incident measurements of the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) aboard the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) mission the new "cirrus optical properties derived from CALIOP and SEVIRI algorithm during day and night" (COCS) algorithm utilizes a backpropagation neural network to provide accurate measurements of cirrus optical depth τ at λ = 532 nm and top altitude z every 15 min covering almost one-third of the Earth's atmosphere. The retrieved values are validated with independent measurements of CALIOP and the optical thickness derived by an airborne high spectral resolution lidar.

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