منابع مشابه
Dust devils as observed by Mars Pathfinder
[1] Dust devils are localized meteorological phenomena frequently observed in terrestrial dry lands and desert landscapes as well as on Mars. They are low-pressure, warm core vortices that form at the bottom of convective plumes and loft dust from the surface. They move with the speed of the ambient wind and are tilted by wind shears. The Mars Pathfinder detected dust devils as dust plumes in t...
متن کاملRadiative Transfer Modelling of Dust Devils
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متن کاملObserving desert dust devils with a pressure logger
A commercial pressure logger has been adapted for long-term field use. Its flash memory affords the large data volume to allow months of pressure measurements to be acquired at the rapid cadence (> 1 Hz) required to detect dust devils, small dust-laden convective vortices observed in arid regions. The power consumption of the unit is studied and battery and solar/battery options evaluated for l...
متن کاملElectrical discharges and broadband radio emission by Martian dust devils and dust storms
[1] Triboelectric charging of saltating and colliding sand and dust particles produces strong electric fields in terrestrial dust devils and dust storms. Acceleration of the charged particles, as well as microdischarges between them, generates wideband electromagnetic radiation. Similar phenomena are expected to be ubiquitous on Mars, because Martian dust devils and dust storms are larger, stro...
متن کاملRole of dust devils and orbital precession in closing the Martian dust cycle
[1] We use a general circulation model to simulate the role of dust devils on the Martian dust cycle as a function of orbital precession. We focus specifically on the two most recent epochs of 22,500 and 72,500 years ago when perihelion occurred near northern summer solstice. We find that dust devils dominate the dust cycle at these times and that while orbital precession does modulate the exch...
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ژورنال
عنوان ژورنال: Astronomy and Geophysics
سال: 2005
ISSN: 1366-8781,1468-4004
DOI: 10.1111/j.1468-4004.2005.46516.x