Accession Number : ADA323148

Title :   Detection and Retrieval of Cirrus Cloud Systems Using AVHRR Data: Verification Based on FIRE-II-IFO Composite Measurements.

Descriptive Note : Final rept. 22 Dec 94-30 Sep 96,

Corporate Author : UTAH UNIV SALT LAKE CITY CENTER FOR ATMOSPHERIC AND REMOTE SOUNDING STUDIES

Personal Author(s) : Ou, S. C. ; Liou, K. N. ; Takano, Y. ; Yang, P. ; Rao, N. X.

PDF Url : ADA323148

Report Date : DEC 1996

Pagination or Media Count : 57

Abstract : A numerical scheme has been developed to identify multilayer cirrus cloud systems using AVHRR data based on the physical properties of the AVHRR channels 2-1 reflectance ratios, the brightness temperature differences between Chs. 4 and 5, and the Ch. 4 brightness temperatures. Subsequently, we have devised an algorithm for the retrieval of cirrus cloud optical depths and ice crystal sizes in multilayer cloud systems based on the theory of radiative transfer and parameterizations. Both the detection and retrieval results have been validated from the cloud conditions, optical depths, and mean effective ice crystal sizes inferred from the collocated and coincident ground-based lidar and radar images, balloon-borne replicator data, aircraft 2D probe data, and NCAR CLASS temperature and humidity sounding data on a case-by-case basis.

Descriptors :   *OPTICAL RADAR, *CLOUD PHYSICS, *CIRRUS CLOUDS, ALGORITHMS, INFRARED DETECTION, ATMOSPHERIC TEMPERATURE, RADIATIVE TRANSFER, RADAR IMAGES, HIGH RESOLUTION, ICE FORMATION, METEOROLOGICAL DATA, BRIGHTNESS, INFRARED IMAGES, CLIMATE, REFLECTANCE, RADIOMETERS, HUMIDITY, METEOROLOGICAL BALLOONS, SATELLITE IMAGERY.

Subject Categories : Meteorology
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE