VIS-NIR reflectance of water ice/regolith analogue mixtures and implications for the detectability of ice mixed within planetary regoliths

Yoldi, Zurine; Pommerol, Antoine; Jost, Bernhard; Poch, Olivier; Gouman, Julien Michel Adrien; Thomas, Nicolas (2015). VIS-NIR reflectance of water ice/regolith analogue mixtures and implications for the detectability of ice mixed within planetary regoliths. Geophysical Research Letters, 42(15), pp. 6205-6212. American Geophysical Union 10.1002/2015gl064780

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Permanently shadowed regions at the poles of the Moon and Mercury have been pointed out as candidates for hosting water ice at their surface. We have measured in the laboratory the visible and near infrared spectral range (VIS-NIR) bidirectional reflectance of intimate mixtures of water ice and the JSC-1AF lunar simulant for different ice concentrations, particle sizes, and measurement geometries. The nonlinearity between the measured reflectance and the amount of ice in the mixture can be reproduced to some extent by the mixing formulas of standard reflectance models, in particular, those of Hapke and Hiroi, which are tested here. Estimating ice concentrations from reflectance data without knowledge of the mixing coefficientsstrongly dependent on the size/shape of the grainscan result in large errors. According to our results, it is possible that considerable amounts of water ice might be intimately mixed in the regolith of the Moon and Mercury without producing noticeable photometric signatures.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute > NCCR PlanetS

UniBE Contributor:

Pommerol, Antoine; Jost, Bernhard; Poch, Olivier; Gouman, Julien Michel Adrien and Thomas, Nicolas

Subjects:

500 Science
500 Science > 530 Physics

ISSN:

0094-8276

Publisher:

American Geophysical Union

Language:

English

Submitter:

Katharina Weyeneth-Moser

Date Deposited:

09 May 2016 08:58

Last Modified:

13 Mar 2018 16:59

Publisher DOI:

10.1002/2015gl064780

Web of Science ID:

000360414900010

BORIS DOI:

10.7892/boris.81732

URI:

https://boris.unibe.ch/id/eprint/81732

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