Results from the Mars Global Surveyor Thermal Emission Spectrometer.
Science
; 279(5357): 1692-8, 1998 Mar 13.
Article
en En
| MEDLINE
| ID: mdl-9497282
The Thermal Emission Spectrometer spectra of low albedo surface materials suggests that a four to one mixture of pyroxene to plagioclase, together with about a 35 percent dust component provides the best fit to the spectrum. Qualitative upper limits can be placed on the concentration of carbonates (<10 percent), olivine (<10 percent), clay minerals (<20 percent), and quartz (<5 percent) in the limited regions observed. Limb observations in the northern hemisphere reveal low-lying dust hazes and detached water-ice clouds at altitudes up to 55 kilometers. At an aerocentric longitude of 224 degrees a major dust storm developed in the Noachis Terra region. The south polar cap retreat was similar to that observed by Viking.
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01-internacional
Base de datos:
MEDLINE
Asunto principal:
Marte
/
Medio Ambiente Extraterrestre
Tipo de estudio:
Qualitative_research
Idioma:
En
Revista:
Science
Año:
1998
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Estados Unidos