SPECTRAL ABSORPTION CHARACTERISTICS OF THE MAJOR COMPONENTS OF DUST CLOUDS
Technical rept. May 1968-Dec 1969
EDGEWOOD ARSENAL ABERDEEN PROVING GROUND MD
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It is well known that dust clouds selectively absorb radiation in the 700 to 1300reciprocal cm. atmospheric window region. Studies have shown that dust clouds are composed of the same minerals as surface soils, although in different proportion. Seventy soil samples were examined from a number of locations around the world to determine their compositions and spectral characteristics. The results indicate that there are five major components that selectively absorb radiation in the 700 to 1300reciprocal cm. region. These are three clay minerals, silica, and calcium carbonate. Absorptivity coefficient spectra of representative soil samples are given in the body of the report, and transmission spectra of all soil samples are given in the appendix.
- Atmospheric Physics