Physical properties of ammonian-rich ice: Application to Titan

Ralph D. Lorenz, Sarah E. Shandera

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

We report simple measurements of the physical properties of frozen aqueous solutions of NH3 down to 80 K. These measurements are relevant for the geophysics of icy satellites and Titan in particular. We find that the thermal conductivity of NH3-rich (∼10-30%) water ice is 1-2 Wm-1K-1, or 2-3 times lower than that of pure water ice. We find evidence for significant microwave absorptivity in NH3-rich ice - even at 100K - and that the electrical properties are very strongly temperature-dependent. At around 100K the Young's Modulus for NH3-free and NH3-rich ice appears to be about the same, while at 160K the NH3-rich ice is 10x more compliant.

Original languageEnglish (US)
Pages (from-to)215-218
Number of pages4
JournalGeophysical Research Letters
Volume28
Issue number2
DOIs
StatePublished - Jan 15 2001

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Titan
ice
physical property
physical properties
icy satellites
electrical property
Young modulus
geophysics
thermal conductivity
water
modulus of elasticity
absorptivity
aqueous solution
electrical properties
aqueous solutions
microwaves
temperature

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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abstract = "We report simple measurements of the physical properties of frozen aqueous solutions of NH3 down to 80 K. These measurements are relevant for the geophysics of icy satellites and Titan in particular. We find that the thermal conductivity of NH3-rich (∼10-30{\%}) water ice is 1-2 Wm-1K-1, or 2-3 times lower than that of pure water ice. We find evidence for significant microwave absorptivity in NH3-rich ice - even at 100K - and that the electrical properties are very strongly temperature-dependent. At around 100K the Young's Modulus for NH3-free and NH3-rich ice appears to be about the same, while at 160K the NH3-rich ice is 10x more compliant.",
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Physical properties of ammonian-rich ice : Application to Titan. / Lorenz, Ralph D.; Shandera, Sarah E.

In: Geophysical Research Letters, Vol. 28, No. 2, 15.01.2001, p. 215-218.

Research output: Contribution to journalArticle

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