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Región polar norte de Marte: resultados de imágenes de Viking 2
Science (New York, N.Y.)
|December 11, 1976
Resumen
Las imágenes del orbitador Viking 2 revelan que el polo norte de Marte tiene extensos depósitos estratificados cubiertos de hielo y dunas oscuras, lo que sugiere rápidos cambios geológicos y una compleja historia climática. Esto proporciona nuevos conocimientos sobre la evolución polar.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Geología Geología Geología.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- La región polar norte de Marte es un área clave para comprender la historia del clima marciano.
- Las misiones anteriores proporcionaron datos limitados de alta resolución de esta región.
Objetivo del estudio:
- Para analizar imágenes de alta resolución de la región polar norte de Marte adquiridas por el orbitador Viking 2.
- Para investigar las características geológicas e inferir la historia climática del polo norte marciano.
Principales métodos:
- Adquisición y análisis de aproximadamente 700 imágenes de alta resolución tomadas por el orbitador Viking 2.
- Interpretación geomorfológica de depósitos en capas, cubierta de hielo, dunas y cráteres de impacto.
Principales resultados:
- Confirmación de extensos depósitos en capas cubiertos por hielo perenne en el polo norte.
- Identificación de una falta de conformidad dentro de los depósitos en capas, lo que indica un cambio climático complejo.
- Descubrimiento de un campo de dunas que rodea los polos y está compuesto de materiales oscuros.
- Ausencia de cráteres de impacto frescos, lo que implica procesos geológicos rápidos.
Conclusiones:
- El polo norte marciano exhibe una compleja historia geológica influenciada por el cambio climático.
- Las tasas de rápida erosión o deposición se deducen de las características del paisaje.
- Un escenario propuesto para la evolución geológica polar implica dos eventos distintos de cambio climático.
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