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Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
Un modelo de sublimación para el hielo marciano en el polo sur presenta características de sublimación
Shane Byrne1, Andrew P Ingersoll
1Division of Geological and Planetary Sciences, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA.
Science (New York, N.Y.)
|February 15, 2003
Resumen
La atmósfera de Marte es la atmósfera de Marte.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Ciencias de la atmósfera Ciencias atmosféricas.
- Geología Geología Geología.
Sus antecedentes:
- La atmósfera de Marte es predominantemente de dióxido de carbono.
- Investigaciones anteriores sugirieron que un gran depósito polar de dióxido de carbono controla la composición atmosférica.
- Se debate el papel de los depósitos polares en la regulación atmosférica de Marte.
Objetivo del estudio:
- Desafiar la teoría prevaleciente de un gran depósito polar de dióxido de carbono en Marte.
- Proponer un modelo alternativo para el ciclo atmosférico de dióxido de carbono de Marte.
- Para investigar la composición y la dinámica de la capa polar sur de Marte.
Principales métodos:
- Utilizando el modelado computacional de depresiones circulares en la capa polar sur de Marte.
- Analizando los datos infrarrojos térmicos de la misión Mars Odyssey.
- Investigando la interacción entre el hielo de dióxido de carbono y las capas de hielo de agua.
Principales resultados:
- Es probable que el depósito de dióxido de carbono polar sea mucho más pequeño de lo que se estimaba anteriormente.
- Una capa de hielo de dióxido de carbono de aproximadamente 8 metros de espesor se está erosionando.
- El hielo de agua subterránea está siendo expuesto por la sublimación del hielo de dióxido de carbono.
- Este proceso es consistente con las firmas infrarrojas térmicas observadas.
Conclusiones:
- El pequeño depósito polar no puede actuar como un amortiguador a largo plazo para la atmósfera marciana.
- Las características observadas sugieren un proceso dinámico de grabado de hielo con dióxido de carbono.
- El dióxido de carbono atmosférico de Marte puede estar regulado por mecanismos diferentes de lo que se suponía anteriormente.
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