Japan Geoscience Union Meeting 2015

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Oral

Symbol P (Space and Planetary Sciences) » P-PS Planetary Sciences

[P-PS23] Lunar science and exploration

Mon. May 25, 2015 4:15 PM - 6:00 PM A02 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Hiroshi Nagaoka(Waseda Univ.), Tomokatsu Morota(Graduate School of Environmental Studies, Nagoya University), Masaki N Nishino(Solar-Terrestrial Environment Laboratory, Nagoya University), Chikatoshi Honda(The University of Aizu), Yuichiro Cho(Department of Physics, Rikkyo University), Chair:Makoto Hareyama(Department of Physiology (Physics), St. Marianna University School of Medicine), Ryuhei Yamada(National Astronomical Observatory of Japan, RISE project)

5:48 PM - 5:51 PM

[PPS23-P09] Water trapped at lunar regolith

3-min talk in an oral session

*Ryota HASUNAKA1 (1.Department of Earth and Space Science, Graduate School of Science, Osaka University)

Keywords:moon, regolith, water, simulation

We simulated the behavior of water in lunar regolith, and examined if water could be trapped for a long term. The situation for our simulation corresponds to the lunar surface shined by the Sun at noon, whereas the situation at permanently shaded areas is simulated by Schorghofer1 and Taylor (2007). Transportations of heat and water vapor could be expressed by similar-form equations, namely the diffusion equations. We observed condensation of ice at the deep part of the regolith, at latitudes higher than 84o. Our results indicate that water could be trapped at >10 cm depth layer of the lunar regolith. The trapped water could correspond to the "hidden" water resource at lunar surface, which is not visible by remote-sensing observation.