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Las mediciones de espectroscopia de imágenes infrarrojas de Galileo en Venus
Resumen
La nave espacial Galileo reveló variaciones significativas de nubes en la atmósfera baja de Venus. Estos hallazgos proporcionan información sobre Venus.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Ciencias de la atmósfera Ciencias atmosféricas.
- Venus Ciencia Venus Ciencia
Sus antecedentes:
- La misión Galileo de 1990 proporcionó una oportunidad única para estudiar Venus.
- Comprender la dinámica atmosférica de Venus es crucial para la planetología comparativa.
Objetivo del estudio:
- Para investigar la atmósfera del lado nocturno de Venus utilizando el espectrómetro de mapeo del infrarrojo cercano.
- Para analizar la estructura de las nubes, los patrones de viento y la composición química a altitudes más bajas.
Principales métodos:
- Utilizó imágenes multiespectrales del espectrómetro de mapeo del infrarrojo cercano durante el sobrevuelo de Galileo Venus en 1990.
- Los datos analizados se encuentran en el rango espectral de 0,7 a 5,2 micrómetros.
- Velocidades del viento y abundancias de especies atmosféricas derivadas de perfiles espectrales e imágenes.
Principales resultados:
- Se identificaron variaciones sustanciales en la opacidad de las nubes en las cubiertas de nubes inferiores de Venus (a unos 50 km de altitud).
- Derivados de vientos zonales y meridionales consistentes con la circulación celular de Hadley.
- Se observaron diferencias significativas entre las estructuras de nubes del hemisferio norte y sur.
- Abundancias cuantificadas de la atmósfera inferior de vapor de agua y otras especies.
Conclusiones:
- La atmósfera inferior de Venus exhibe estructuras dinámicas de nubes y características hemisféricas distintas.
- Los patrones de viento observados apoyan modelos de circulación atmosférica, específicamente la rama superior de una célula de Hadley.
- El estudio proporciona datos valiosos sobre la composición y dinámica de la atmósfera de Venus.
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