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- W2012808651 abstract "Wind erosion and deposition are powerful agents of surface change on Mars. Erosion is sensitive to the atmospheric density, so feedback between orbit variations and atmospheric density can enhance the sensitivity of erosion rates to orbital parameters. We use statistics derived from a 1 Gyr integration of the spin axis of Mars, coupled with runs of the NASA Ames 3-D general circulation model (GCM) at a variety of orbital conditions and pressures, to explore this feedback. We find that wind erosion in the GCM is associated with two factors: baroclinic zone winds, and strong cross-equator solstice flows. Both of these factors are influenced by topography, producing an asymmetry in the erosion pattern between the north and the south. The erosion model, averaged over 1 Gyr, produces potential erosion rates of 1.7×10−5myr−1 in the north and 1.0×10−5myr−1 in the south, which increase by an order of magnitude in an early 28 mbar atmosphere. The stability of these potential erosion patterns over geological time indicates that the lowland regions of Mars are continuously eroded, and that wind is capable of revealing ancient sedimentary deposits, or eroding substantial deposits that may have otherwise been preserved." @default.
- W2012808651 created "2016-06-24" @default.
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- W2012808651 date "2005-07-01" @default.
- W2012808651 modified "2023-09-23" @default.
- W2012808651 title "Long term wind erosion on Mars" @default.
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- W2012808651 doi "https://doi.org/10.1016/j.icarus.2005.01.005" @default.
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