GEOSCAN, résultats de la recherche

Menu GEOSCAN

• Cherchez GEOSCAN

Titre	Mars water-ice clouds and precipitation
	Tweet   Share
Auteur	Whiteway, J A; Komguem, L; Dickinson, C; Cook, C; Illnicki, M; Seabrook, J; Popovici, V; Duck, T J; Davy, R; Taylor, P A; Pathak, J; Fisher, D; Carswell, A I; Daly, M; Hipkin, V; Zent, A P; Hecht, M H; Wood, S E; Tamppari, L K; Renno, N; Moores, J E; Lemmon, M T; Daerden, F; Smith, P H
Source	Science vol. 325, no. 5936, 2009 p. 68-70, https://doi.org/10.1126/science.1172344
Liens	Supporting Online Material
Année	2009
Séries alt.	Secteur des sciences de la Terre, Contribution externe 20080644
Éditeur	American Association for the Advancement of Science (AAAS)
Document	livre
Lang.	anglais
DOI	https://doi.org/10.1126/science.1172344
Media	papier; en ligne; numérique
Formats	pdf
Région	Mars
Sujets	précipitation; glace; effets climatiques; géologie extraterrestre
Programme	Soutien aux personnes
Diffusé	2009 07 02
Résumé	(disponible en anglais seulement) The light detection and ranging instrument on the Phoenix mission observed water-ice clouds in the atmosphere of Mars that were similar to cirrus clouds on Earth. Fall streaks in the cloud structure traced the precipitation of ice crystals toward the ground. Measurements of atmospheric dust indicated that the planetary boundary layer (PBL) on Mars was well mixed, up to heights of around 4 kilometers, by the summer daytime turbulence and convection. The water-ice clouds were detected at the top of the PBL and near the ground each night in late summer after the air temperature started decreasing. The interpretation is that water vapor mixed upward by daytime turbulence and convection forms ice crystal clouds at night that precipitate back toward the surface.
GEOSCAN ID	226356