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La erosión estacional y la restauración de las dunas del polo norte de Marte
C J Hansen1, M Bourke, N T Bridges
1Planetary Science Institute, Tucson, AZ 85719, USA. cjhansen@psi.edu
Science (New York, N.Y.)
|February 5, 2011
Resumen
Las dunas marcianas experimentan cambios únicos durante la primavera debido a la sublimación del hielo de dióxido de carbono (CO2). Este proceso crea nuevas características y altera la morfología de las dunas, lo que indica un transporte activo de arena en Marte.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Geología Geología Geología.
- La detección remota con sensores.
Sus antecedentes:
- Las dunas terrestres y marcianas comparten similitudes, lo que sugiere procesos comunes de salazón y caída de grano.
- Las dunas marcianas existen bajo condiciones ambientales distintas a las de la Tierra.
Objetivo del estudio:
- Para investigar los procesos únicos de modificación que afectan a las dunas marcianas.
- Para analizar los cambios morfológicos en las dunas marcianas durante un solo año marciano.
Principales métodos:
- Utilizando imágenes del experimento científico de imágenes de alta resolución (HiRISE) en el Mars Reconnaissance Orbiter (MRO).
- Observar y documentar los cambios morfológicos de las dunas en la región polar norte de Marte.
Principales resultados:
- Las dunas marcianas exhiben cambios morfológicos de primavera impulsados por la sublimación del hielo de dióxido de carbono (CO2).
- Los cambios observados incluyen nuevas alcobas, barrancos y extensiones del delantal de las dunas.
- La remobilización posterior del viento crea ondas y borra barrancos, lo que indica procesos activos.
Conclusiones:
- La sublimación de CO2 en primavera es un proceso significativo de modificación de dunas en Marte, que no se observa en la Tierra.
- Los cambios rápidos y generalizados en las dunas sugieren un transporte activo de arena dentro de los erg. polares de Marte.
- Estos hallazgos proporcionan información sobre el clima actual de Marte y la actividad geológica.
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