P4.24
Supercooled Liquid Water Cloud Properties Derived from GOES and Comparisons with In-Situ Aircraft Measurements
PAPER WITHDRAWN
William L. Smith Jr., NASA/LRC, Hampton, VA; and P. Minnis, B. C. Bernstein, D. Young, and P. W. Heck
The existence of super-cooled liquid water (SLW) in clouds is of concern to the general aviation community since it can freeze on contact with aircraft and adversely affect the aircraft's performance. Icing on the airframe can increase drag, decrease lift and cause control problems. The degree with which SLW will freeze and affect an aircraft's performance depends on several factors including the type and weight of the aircraft, the duration of exposure to SLW and the accretion rate of ice on the airframe. The severity of ice accretion is sensitive to temperature, the liquid water content and the drop size distribution Recent advances in geostationary satellite sensors now permit us to derive cloud optical depth, particle size, phase and water path in near real-time. Therefore, satellite data can be used to detect SLW directly since since SLW is often found to accumulate in the top several hundred meters of cloud layers. In this paper, we present a technique to derive the cloud optical properties of SLW clouds from geostationary (GOES) satellite data. The satellite retrievals are co-located and compared with in-situ aircraft measurements of cloud microphysical properties made over a three month period from the NASA Glenn Twin Otter. The potential for using real-time geostationary satellite data to indicate the location of icing conditions and its severity for the aviation community is explored.
Poster Session 4, Radiances, Clouds, and Retrievals
Wednesday, 17 October 2001, 9:15 AM-11:00 AM
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