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Measurement of cirrus cloud optical properties from ground- and aircraft-based high-spectral-resolution interferometry

High spectral resolution Fourier transform spectrometry has been used to derive cirrus cloud optical properties. Data from both ground- and aircraft-based observations, combined with lidar and radiosonde measurements, will be shown from various field campaigns to demonstrate our approach. Ground-based results are from the Atmospheric Emitted Radiance Interferometer, based at the Atmospheric Radiation Measurement program Cloud and Radiation Testbed. Aircraft measurements are from the Scanning High-resolution Interferometer Sounder acquired during the SAFARI-2000 mission in South Africa. It is anticipated that long-term cirrus measurements on a seasonal scale will produce a cloud climatology based on synoptic conditions which can be parameterized on a global scale for use in GCMs.