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Los efectos de la rotación solar en las termosferas de Marte y la Tierra
Jeffrey M Forbes1, Sean Bruinsma, Frank G Lemoine
1Department of Aerospace Engineering Sciences, University of Colorado, Boulder, CO 80309, USA. forbes@colorado.edu
Science (New York, N.Y.)
|June 3, 2006
Resumen
La Tierra La Tierra La Tierra La Tierra La Tierra
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Física de la atmósfera Física de la atmósfera
- Las relaciones solar-terrestres.
Sus antecedentes:
- La termosfera es una capa atmosférica crucial influenciada por la actividad solar.
- Comprender las respuestas termosféricas a las variaciones del flujo solar es clave para el modelado atmosférico.
- Estudios previos han indicado diferentes respuestas solares en los planetas.
Objetivo del estudio:
- Para comparar las respuestas de temperatura termosférica de la Tierra y Marte a las variaciones del flujo solar.
- Proporcionar datos de observación para validar y mejorar las simulaciones comparativas de la termosfera.
- Para investigar el papel de los cambios de flujo impulsados por la rotación solar en el equilibrio térmico de la atmósfera planetaria.
Principales métodos:
- Medidas contemporáneas de las respuestas termosféricas en la Tierra y Marte.
- Utilizando el flujo de radio de 10,7 centímetros como un sustituto para el flujo de ultravioleta extrema (EUV).
- Analizar los cambios de temperatura en respuesta a una variación de flujo solar típica de 20 unidades.
Principales resultados:
- La termosfera de la Tierra muestra un aumento de temperatura de 42.0 ± 8.0 K por cambio de flujo solar de 20 unidades.
- La termosfera de Marte exhibe una respuesta más pequeña, con un aumento de temperatura de 19.2 ± 3.6 K.
- Los datos de Venus sugieren una respuesta aún más pequeña de 3.6 ± 0.6 K.
Conclusiones:
- La termosfera de la Tierra es dos veces más sensible a las variaciones del flujo solar que la de Marte.
- Estos hallazgos proporcionan restricciones observacionales críticas para los modelos comparativos de la termosfera planetaria.
- Los resultados pueden ayudar a resolver las incertidumbres en el equilibrio térmico planetario, especialmente con respecto al enfriamiento de CO2.
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