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Evolución de una atmósfera de nitrógeno en Titán
Science (New York, N.Y.)
|August 18, 1978
Resumen
El titán Titan es un titán.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astroquímica es astroquímica.
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- La composición de la atmósfera de Titán no se entiende completamente.
- Los modelos anteriores no explicaban completamente las condiciones atmosféricas de Titán.
Objetivo del estudio:
- Para investigar la evolución atmosférica de Titán.
- Para explicar la composición atmosférica actual y la temperatura de la superficie de Titán.
Principales métodos:
- Se realizaron cálculos fotoquímicos.
- Se analizaron las vías de reacción de la fase gaseosa.
- Se modelaron las condiciones de temperatura y presión atmosféricas.
Principales resultados:
- La desgasificación de amoníaco (NH3) en Titán probablemente se convirtió en una densa atmósfera de nitrógeno (N2).
- Un efecto invernadero de metano-hidrógeno (CH4-H2) puede haber elevado las temperaturas a 150 K.
- Aproximadamente 20 barras de N2 podrían haber evolucionado, lo que explica la temperatura superficial de 200 K.
- A diferencia de Júpiter, el amoníaco no se recicla en la atmósfera de Titán.
Conclusiones:
- La vía de formación de N2 propuesta explica la densidad atmosférica y la temperatura de la superficie de Titán.
- La falta de reciclaje de amoníaco explica la falta de detección de NH3 en la atmósfera superior de Titán.
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