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 کاملRetrieving Dust Properties by Radiative Transfer Modelling of Dust Devils on Earth and Mars
To date, characterisation of dust devils by interpreting spectral measurements taken during a transit over a spectroscopic instrument has yet to be done and would provide valuable information of the physical size, dust load and internal structure of transiting dust devils. A Monte Carlo Radiative Transfer model (MCRT) was developed to investigate the spectral variations during a dust devil tran...
متن کاملDust “ Drifts ” on Mars
Introduction: Eolian sedimentary deposits are important because they provide a record of the direction and strength of winds on Mars and the type and flux of sediments transported by the winds. While Martian sand dunes and transverse aeolian ridges ("TARs") have been thoroughly studied, the sedimentary deposits left behind by blowing dust have received comparatively little attention to date. Wi...
متن کاملPower law distribution of pressure drops in dust devils Observation techniques and Earth–Mars comparison
Data from the Pathfinder and Phoenix landers on Mars show transient pressure drops ( 1–4 per day) attributed to nearby encounters with dust devils or dust-free vortices. The distribution of pressure drop amplitudes is consistent with a truncated power law distribution with a slope of 2, similar to that suggested previously for the optical diameters of dust devils. Comparable data from terrestri...
متن کاملTropical Dust Cyclones on Mars
Introduction: Atmospheric dust plays an important role in regulating the climate of Mars and strongly influences the deposition of incoming solar energy and outgoing infrared radiation, thereby affecting atmospheric dynamics through heating. The lifting of dust from the surface is fundamentally a result of atmospheric circulations, and this provides an opportuntity for feedback between atmosphe...
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ژورنال
عنوان ژورنال: Physics Today
سال: 2020
ISSN: 0031-9228,1945-0699
DOI: 10.1063/pt.3.4531