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Wind abrasion on mars
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Greeley, Ronald |
| Copyright Year | 1991 |
| Description | Aeolian activity was predicted for Mars from earth based observations of changing surface patterns that were interpreted as dust storms. Mariner 9 images showed conclusive evidence for aeolian processes in the form of active dust storms and various aeolian landforms including dunes and yardangs. Windspeeds to initiate particle movement are an order of magnitude higher on Mars than on Earth because of the low atmospheric density on Mars. In order to determine rates of abrasion by wind blown particles, knowledge of three factors is required: (1) particle parameters such as numbers and velocities of windblown grains as functions of windspeeds at various heights above the surface; (2) the susceptibility to abrasion of various rocks and minerals; and (3) wind frequencies and speeds. For estimates appropriate to Mars, data for the first two parameters can be determined through lab and wind tunnel tests; data for the last two factors are available directly from the Viking Lander meteorology experiments for the two landing sites. |
| File Size | 110802 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910017750 |
| Archival Resource Key | ark:/13960/t2b905m53 |
| Language | English |
| Publisher Date | 1991-05-01 |
| Access Restriction | Open |
| Subject Keyword | Lunar And Planetary Exploration Abrasion Wind Effects Particle Motion Dust Storms Mars Atmosphere Minerals Mariner 9 Space Probe Mars Photographs Viking Lander Spacecraft Wind Tunnel Tests Rocks Atmospheric Density Wind Meteorology Dunes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
