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Titolo:
Thermal inertia of crater-related wind streaks on Mars
Autore:
Pelkey, SM; Jakosky, BM; Mellon, MT;
Indirizzi:
Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA Univ Colorado Boulder CO USA 80309 Space Phys Lab, Boulder, CO 80309 USA Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA Univ Colorado Boulder CO USA 80309 & Planetary Sci, Boulder, CO 80309 USA Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA Univ Colorado BoulderCO USA 80309 , Dept Geol Sci, Boulder, CO 80309 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
fascicolo: E10, volume: 106, anno: 2001,
pagine: 23909 - 23920
SICI:
0148-0227(20011025)106:E10<23909:TIOCWS>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
SURFACE-PROPERTIES; VARIABLE FEATURES; MARINER-9;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Pelkey, SM Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392,DuanePhys Bldg,Boulder, CO 80309 USA Univ Colorado Campus Box 392,Duane Phys Bldg Boulder CO USA 80309
Citazione:
S.M. Pelkey et al., "Thermal inertia of crater-related wind streaks on Mars", J GEO R-PLA, 106(E10), 2001, pp. 23909-23920

Abstract

Data from the Thermal Emission Spectrometer (TES) on board the Mars GlobalSurveyor spacecraft are used to analyze the structure of and materials comprising crater-related wind streaks. Comparisons of high-resolution TES albedo and TES-based thermal inertia values within and adjacent to the streaksallow us to constrain the properties of the streaks and gain insight into their physical structure. The majority of the analyzed Type I bright, depositional streaks are distinct from the surrounding terrain in albedo, but not in thermal inertia. We conclude that these streaks consist of thin deposits of bright material greater than similar to1 mum thick but less than 1-3 mm thick. The majority of the analyzed Type I dark, erosional streaks identified from Viking images are now indistinct from the surrounding terrain inboth albedo and thermal inertia. We conclude that these streaks have been covered by a thin deposit of bright material greater than similar to1 pm thick but less than 1-3 mm thick. All of the analyzed Type II dark, depositional streaks are distinct from the surrounding terrain in both albedo and thermal inertia. We conclude that these streaks consist of deposits greater than a few centimeters thick. In this case we were also able to use the thermal inertia values to estimate the particle sizes of the deposited material; the values correspond to a broad range of sand-sized particles easily mobilized by wind, supporting the deflation/deposition theory of Type II streak formation.

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Documento generato il 29/05/20 alle ore 13:52:19