GEOSCAN, résultats de la recherche


TitreH2O at the Phoenix landing site
AuteurSmith, P H; Tampppari, L K; Arvidson, R E; Bass, D; Blaney, D; Boynton, W V; Carswell, A; Catling, D C; Clark, B C; Duck, T; DeJong, E; Fisher, D; Goetz, W; Gunnlaugsson, H P; Hecht, M H; Hipkin, V; Hoffman, J; Hviid, S F; Keller, H U; Kounaves, S P; Lange, C F; Lemmon, M T; Madsen, M B; Markiewicz, W J; Marshall, J; McKay, C P; Mellon, M T; Ming, D W; Morris, R V; Pike, W T; Renno, N; Staufer, U; Stoker, C; Taylor, P; Whiteway, J A; Zent, A P
SourceScience vol. 325, no. 5936, 2009 p. 58-61,
Séries alt.Secteur des sciences de la Terre, Contribution externe 20090105
ÉditeurAmerican Association for the Advancement of Science (AAAS)
Documentpublication en série
Mediapapier; en ligne; numérique
Sujetseaux de surface; analyses de l'eau; prospection de l'eau; sols; études pédologiques; propriétés du sol; humidité du sol; glace fossile; glace; hydrogéologie; pédologie
Illustrationsphotographs; plots
Diffusé2009 07 02
Résumé(disponible en anglais seulement)
The Phoenix mission investigated patterned ground and weather in the northern arctic region of Mars for 5 months starting 25 May 2008 (solar longitude between 76.5° and 148°). A shallow ice table was uncovered by the robotic arm in the center and edge of a nearby polygon at depths of 5 to 18 centimeters. In late summer, snowfall and frost blanketed the surface at night; H2O ice and vapor constantly interacted with the soil. The soil was alkaline (pH = 7.7) and contained CaCO3, aqueous minerals, and salts up to several weight percent in the indurated surface soil. Their formation likely required the presence of water.