Physics – Optics
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mmsai..49..127t&link_type=abstract
(Società Astronomica Italiana, Conference on Infrared Astronomy, 1st, Lecce, Italy, Sept. 22-24, 1977.) Società Astronomica Ital
Physics
Optics
1
Atmospheric Attenuation, Infrared Absorption, Lower Atmosphere, Optical Thickness, Photoabsorption, Water Vapor, Atmospheric Models, Atmospheric Optics, Infrared Radiation, Precipitation (Meteorology), Vertical Distribution
Scientific paper
Atmospheric attenuation in the wavelength region from 8 to 13 microns is analyzed in terms of nonselective absorption by water vapor and extinction by particulate matter. Optical properties of the atmosphere are determined by constructing a model atmosphere with realistic water-vapor and particulate contents and covering the height range from the surface to 30 km. Vertical profiles of particulate optical thickness and atmospheric water vapor are compared, and the total optical thicknesses of both particles and water vapor are compared separately for heights of 0 to 10 km and 10 to 30 km. The results indicate that the atmospheric optical thickness due to water vapor is about an order of magnitude greater than that due to particulate matter for clear and relatively dry conditions in the lower troposphere and that water vapor and particulate matter produce comparable attenuation effects in warm and humid atmospheres characterized by hazy conditions.
Tomasi Carlo
Vittori Ottavio
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