Institute for Atmospheric and Environmental Research

CRISTA-NF - a Helium-cooled Infrared Telescope for the Atmosphere

First Preliminary Results

The radiation measured by the infrared detectors is assigned to single altitude levels. The intensity ratio of two specific wave length regimes allows for a first survey of the transparency of the atmosphere for infrared radiation. The so called Cloud Index along the flight track is shown in the following plots with non-transparent clouds in blue. Thereby blue colors show a low transparency and, thus, the observation of clouds.

Cloud Index of selected SCOUT-O3 transfer flights 2005

Cloud Index of AMMA transfer flights 2006

Cloud Index and observation of PSCs during RECONCILE 2010:

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