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Shock Hugoniot of H_2O ice

Stewart, Sarah T. and Ahrens, Thomas J. (2003) Shock Hugoniot of H_2O ice. Geophysical Research Letters, 30 (6). Art. No. 1332. ISSN 0094-8276. doi:10.1029/2002GL016789.

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The outcome of impacts onto and between icy planetary bodies is controlled by the material response defined by the shock Hugoniot. New Lagrangian shock wave profile measurements in H_2O ice at initial temperatures (T_0) of 100 K, together with previous T_0 = 263 K data, define five distinct regions on the ice Hugoniot: elastic shocks in ice Ih, ice Ih deformation shocks, and shock transformation to ices VI, VII and liquid water. The critical pressures required to induce incipient melting (0.6, 4.5 GPa) and complete melting (3.7, >5.5 GPa) upon isentropic release from the shock state (for T_0 = 263, 100 K) were revised using calculated shock temperatures and entropy. On account of the >40% density increase upon transformation from ice Ih to ices VI and VII, the critical shock pressures required for melting are factors of 2 to 5 lower than earlier predicted. Consequently, hypervelocity impact cratering on planetary surfaces and mutual collisions between porous cometesimals will result in abundant shock-induced melting throughout the solar system.

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Alternate Title:Shock Hugoniot of H2O ice
Additional Information:© 2003 by the American Geophysical Union. Received 18 December 2002; revised 4 February 2003; accepted 7 February 2003; published 27 March 2003. This work was supported by the Planetary Geology and Geophysics program under NASA/Goddard grant number NAG5-10198. We appreciate technical support from M. Long, E. Gelle, and C. McCaughey and thank B. Kamb for use of the Caltech cold laboratory. We thank two anonymous reviewers for their thoughtful comments. Contribution #8873, Division of Geological and Planetary Sciences, California Institute of Technology.
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Caltech Division of Geological and Planetary Sciences8873
Issue or Number:6
Record Number:CaltechAUTHORS:20141022-084531903
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Official Citation:Stewart, S. T., and T. J. Ahrens (2003), Shock Hugoniot of H2O ice, Geophys. Res. Lett., 30, 1332, doi:10.1029/2002GL016789
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50666
Deposited By: Tony Diaz
Deposited On:22 Oct 2014 16:28
Last Modified:10 Nov 2021 18:59

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