Accession Number:

AD0836883

Title:

INFRARED ABSORPTION SPECTRA OF ATMOSPHERIC DUST,

Descriptive Note:

Corporate Author:

ARMY ELECTRONICS COMMAND WHITE SANDS MISSILE RANGE NM ATMOSPHERIC SCIENCES L AB

Personal Author(s):

Report Date:

1968-05-01

Pagination or Media Count:

60.0

Abstract:

Based on the microspectrophotometric analysis of 287 atmospheric dust samples taken within the surface boundary layer over White Sands Missile Range, New Mexico, from May 1966 through October 1967, a representative infrared absorption spectrum spanning the wavenumber range from 4000 to 250cm is presented. The strongest absorption band is centered at 1027cm, within the 1250 to 770cm atmospheric window, and is silicate induced. Two other strong broad absorption bands are the carbonate band at 1425cm and the silicate band at 468cm. Temporal variations in the absorption spectra of the dust are observed primarily in the varying relative intensities of the 1027 and 1425cm absorption bands and in the occasional enhancement of the 1027cm band caused by sulfates in the dust. This study indicates a close similarity between the absorption spectra of the atmospheric dust and the absorption spectra of the small particle fraction of area soils, and between the representative dust spectrum and a spectrum of a synthetic mixture by weight of 80 silicates, 16 carbonates, and 4 nitrates. Author

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE