Accession Number:

ADA242084

Title:

Surface Response to Cloud Shadowing

Descriptive Note:

Scientific rept. no. 3, Oct 89-Dec 90,

Corporate Author:

SPECTRAL SCIENCES INC BURLINGTON MA

Report Date:

1991-02-20

Pagination or Media Count:

33.0

Abstract:

This study investigated the response of surface temperature to cloud shadows. A quantitative model applicable to IR backgrounds was developed. Time- dependent heat flow and energy budget equations have been solved to determine the diurnal variation in surface ground temperatures for a dry, sandy soil with a simple vegetation layer under various cloud conditions. Ground temperatures were determined to vary up to 2K in the first minute following cloud shadowing of solar illumination stable soil temperatures were not reached after over an hour of shade. These results indicate the importance of including cloud shadow ing in the SWOE background model.

Subject Categories:

  • Soil Mechanics
  • Infrared Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE