Estimates of the Extinction of Electromagnetic Energy in the 8 to 12 micrometer Range by Natural Atmospheric Particulate Matter.
Research and Development technical rept.,
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
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DA-1-T-061102-B-53-A-18ECOM5528Atmospheres, Dust, Absorption spectra, Infrared spectra, Far infrared radiation, New MexicoAtmospheric attenuationExtinction coefficients, based on atmospheric dust sampled over southern New Mexico, are tabulated at 0.2 micrometer intervals from 8.0 to 12.0 micrometers for mass concentrations of 1000, 100, and 10 microgramcubic meter. At a concentration of 1000 microgramcubic meter, the peak extinction of about 0.1km occurs at 9.6 micrometers. The method employed uses Mie theory to extrapolate the measured extinction of a suspension of dust in potassium bromide to the extinction of the dust suspended in air. Over the Middle East and North Africa it is estimated that concentrations of 1000 microgramcubic meter and greater occur on an average of 50 to 150 days per year. Author
- Atmospheric Physics