Thermal emission from particulate surfaces: a comparison of scattering models with measured spectra

J. E. Moersch, Philip Christensen

Research output: Contribution to journalArticle

129 Scopus citations

Abstract

Emissivity spectra of particulate mineral samples are highly dependent on particle size when that size is comparable to the wavelength of light emitted (5-50 μm for the midinfrared). Proper geologic interpretation of data from planetary infrared spectrometers will require that these particle size effects be well understood. To address this issue, samples of quartz powders were produced with narrow, well-characterized particle size distributions. Mean particle diameters in these samples ranged from 15 to 277 μm. Emission spectra of these powders allow the first detailed comparison of the complex spectral variations with particle size observed in laboratory data with the predictions of radiative transfer models. Four such models are considered. -from Authors

Original languageEnglish (US)
Pages (from-to)7465-7477
Number of pages13
JournalJournal of geophysical research
Volume100
Issue numberE4
DOIs
StatePublished - Jan 1 1995

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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