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Dióxido de azufre: la inyección episódica muestra evidencia de un volcanismo activo en Venus
Resumen
Los datos de Pioneer Venus revelan una disminución significativa en el dióxido de azufre y la neblina. Esto sugiere que el vulcanismo episódico puede ser responsable de los cambios atmosféricos de Venus, desafiando los modelos de estado estacionario.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Química de la atmósfera química de la atmósfera
- Venus Ciencia Venus Ciencia
Sus antecedentes:
- Los espectros ultravioleta de Pioneer Venus recogidos durante 5 años muestran cambios atmosféricos.
- Los niveles de dióxido de azufre y neblina en las cimas de las nubes de Venus fueron significativamente más altos que los límites superiores anteriores.
Objetivo del estudio:
- Para analizar los cambios en el dióxido de azufre y la neblina en Venus.
- Para investigar la causa de las variaciones atmosféricas y sus implicaciones para los modelos atmosféricos de Venus.
Principales métodos:
- Análisis de los datos espectrales ultravioleta de la misión Pioneer Venus.
- Comparación de las condiciones atmosféricas de Venus con observaciones históricas y eventos volcánicos de la Tierra.
Principales resultados:
- Se observó una disminución de más de 10 veces en la abundancia de dióxido de azufre y neblina submicrónica.
- La apariencia atmosférica de Venus era similar a la de finales de la década de 1950, lo que sugiere la inyección episódica de dióxido de azufre.
- La cantidad de neblina es 10 veces mayor que la estratosfera de la Tierra después de la erupción, lo que requiere una energía térmica significativa para la inyección.
Conclusiones:
- El vulcanismo episódico es una causa probable para la inyección de dióxido de azufre en Venus.
- Los modelos de estado estacionario para la química y la dinámica de las nubes de Venus pueden ser insuficientes.
- La comprensión de los eventos episódicos es crucial para los estudios atmosféricos de Venus.
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