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La primera campaña de MAVEN Deep Dip revela la variabilidad de la termosfera y la ionosfera
S Bougher1, B Jakosky2, J Halekas3
1CLaSP Department, University of Michigan, Ann Arbor, MI, USA. bougher@umich.edu.
Science (New York, N.Y.)
|November 7, 2015
Resumen
La misión Atmosfera y Evolución Volatil de Marte reveló nuevos detalles sobre la atmósfera superior de Marte. Los científicos descubrieron poblaciones de partículas no medidas previamente y una variabilidad significativa, que afectan nuestra comprensión del escape atmosférico.
Área de la Ciencia:
- Ciencias planetarias
- Ciencias atmosféricas
- Aeronomía
Sus antecedentes:
- La atmósfera superior de Marte es crucial para comprender el escape atmosférico y la pérdida volátil.
- Las misiones anteriores carecían de mediciones in situ detalladas a altitudes inferiores a 150 km.
Objetivo del estudio:
- Para llevar a cabo mediciones exhaustivas in situ de la termosfera y la ionosfera marcianas.
- Para investigar la composición, estructura y variabilidad de la atmósfera superior hasta ~ 130 km.
Principales métodos:
- Utilizando la campaña Deep Dip de la misión de la atmósfera y la evolución volátil de Marte (MAVEN).
- Realización de mediciones in situ de partículas neutras y cargadas en la atmósfera superior de Marte.
Principales resultados:
- Descubrimiento de poblaciones de partículas neutrales y cargadas no medidas anteriormente.
- Identificación de la altitud de la homopausa a unos 130 km.
- Observación de la variabilidad atmosférica significativa en escalas de órbita a órbita y dentro de órbita.
Conclusiones:
- Los hallazgos proporcionan datos cruciales para modelar los procesos de escape volátiles.
- La variabilidad en la termosfera y la ionosfera influye directamente en las tasas de pérdida atmosférica.
- Esta investigación refina nuestra comprensión de la evolución de la atmósfera de Marte.
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