Temperature dependence of the water-ice spectrum between 1 and 4 microns: Application to Europa, Ganymede and Saturn's rings

Uwe Fink, Harold P. Larson

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

Reflection spectra of water ice from 1 to 4 μm are presented as a function of temperature. It is found that a feature at 6056 cm-1 changes its intensity sufficiently that it can be used as a spectroscopic measure of the ice temperature. A temperature calibration curve of this feature down to 55 K is developed and is used to determine ice temperatures for the Galilean satellites Europa (95±10 K), Ganymede (103±10 K), and the rings of Saturn (80±5 K). The ice temperatures for the Galilean satellites are lower than their measured brightness temperatures, which can be explained by a higher albedo of the ice covered regions relative to the rest of the satellite and possibly a concentration of the ice near the polar caps.

Original languageEnglish (US)
Pages (from-to)411-420
Number of pages10
JournalIcarus
Volume24
Issue number4
DOIs
StatePublished - Apr 1975

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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