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Proceedings Paper

Influence of humidity profiles derived from GOES imagery in the Canadian forecast model
Author(s): Louis Garand; Jacques Halle
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Paper Abstract

From a pattern recognition technique applied on GOES-7 full disks, humidity profiles defined at six standard levels (300 - 1000 mb) are retrieved on 1 degree(s) X 1 degree(s) areas in all weather/cloud conditions. Using one of two retrievals in each direction, about 3000 profiles are assimilated every six hours from 60 degree(s) N to 60 degree(s) S, 50 degree(s) E to 170 degree(s) W in the Canadian global forecast model. Slightly improved forecasts of geopotential are obtained over North America. Significant differences are noted locally in the forecast instantaneous and accumulated precipitation, especially in the tropics. Both analyses and forecasts of low level stratocumulus which are extensive west of continents are clearly improved. The system became operational in April 1993 and will soon be extended to Meteosat-3 now at 75 degree(s) W; the two geostationary satellites provide humidity profiles on 40% of the globe four times daily.

Paper Details

Date Published: 15 September 1993
PDF: 8 pages
Proc. SPIE 1934, Passive Infrared Remote Sensing of Clouds and the Atmosphere, (15 September 1993); doi: 10.1117/12.154926
Show Author Affiliations
Louis Garand, Atmospheric Environment Service (Canada)
Jacques Halle, Atmospheric Environment Service (Canada)


Published in SPIE Proceedings Vol. 1934:
Passive Infrared Remote Sensing of Clouds and the Atmosphere
David K. Lynch, Editor(s)

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