Obliquity, Ice Sheets, and Layered Sediments on Mars: What Spacecraft Observations and Climate Models Are Telling
نویسندگان
چکیده
OBSERVATIONS AND CLIMATE MODELS ARE TELLING US. M. I. Richardson, Daniel J. McCleese, Michael Mischna, and Ashwin. R. Vasavada, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 ([email protected], [email protected]), Jet Propulsion Laboratory, Pasadena, CA, 91109 ([email protected]), 3 Dept. of Earth and Space Sciences, University of California, Los Angeles, CA, 90095-1567 ([email protected]).
منابع مشابه
Summary of the Marsrecent climate change workshop NASA / Ames Research Center , May 15 – 17 , 2012
This note summarizes the results from the Mars recent climate change workshop at NASA/Ames Research Center, May 15–17, 2012. Published by Elsevier Inc. 1. Background and context Climate change on Mars has been a subject of great interest to planetary scientists since the 1970s when orbiting spacecraft first discovered fluvial landforms on its ancient surfaces and layered terrains in its polar r...
متن کاملTharsis Montes Ice Sheet Models at High Obliquity Driven by Gcm Results
Introduction: Fan-shaped deposits on the flanks of the Tharsis Montes volcanoes [1-3] have been interpreted to be glacial in origin, and are likely Amazonian in age [4]. The deposits contain three distinct facies [5], each of which can be associated with different glacial processes [1]. Earth analogs to these three facies have been identified in the Dry Valleys of Antarctica and their climatic ...
متن کاملClimate Change of Mars: Effects of Obliquity
Introduction: Behaviors of the Martian climate system has been investigated in several studies [e.g., 1-4]. If the Martian climate was warm owing to the greenhouse effect of CO 2 in the past, a drastic climate change (climate jump or climate collapse) due to decrease in the amount of CO 2 in the system must have occurred during the evolution from a warm condition to the present cold condition [...
متن کاملIce Sheet Modeling during High-obliquity Climates on Mars: Application to Tharsis Montes Tropical Mountain Glaciation
Introduction: Deposits on the flanks of the large Tharsis Montes volcanoes have been recognized to be of glacial origin [1,2,3]. These Amazonian-aged deposits display three distinct facies, ridged, knobby, and smooth [4], each of which can be associated with different glacial processes [1]. We use the fundamental differences between the atmospheric snow accumulation environments on Earth [5] an...
متن کاملA recent ice age on Mars: Evidence for climate oscillations from regional layering in mid-latitude mantling deposits
[1] Two end-member hypotheses have been proposed to account for the emplacement and distribution of ice in the near-subsurface of Mars at mid to high latitudes during recent spin-axis/orbital variation-induced climate change. In the first, diffusion of atmospheric water vapor into and out of a porous regolith forms ice-cemented soils whose latitudinal stability migrates as a function of orbital...
متن کامل