GEOSCAN Search Results: Fastlink


TitleMars water-ice clouds and precipitation
AuthorWhiteway, 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
SourceScience vol. 325, no. 5936, 2009 p. 68-70,
LinksSupporting Online Material
Alt SeriesEarth Sciences Sector, Contribution Series 20080644
PublisherAmerican Association for the Advancement of Science (AAAS)
Mediapaper; on-line; digital
File formatpdf
Subjectsextraterrestrial geology; precipitation; ice; climate effects
IllustrationsLidar images
ProgramPeople Support
Released2009 07 02
AbstractThe 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.

Date modified: