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Composición de las nubes de Júpiter, estratificación, convección y movimiento de las olas: una vista desde nuevos
D C Reuter1, A A Simon-Miller, A Lunsford
1NASA Goddard Space Flight Center, Code 693, Greenbelt, MD 20771, USA. dennis.c.reuter@nasa.gov
Science (New York, N.Y.)
|October 13, 2007
Resumen
Los datos de New Horizons revelan ondas mesoscalares de alta velocidad y nubes de hielo de amoníaco transitorias en la atmósfera de Júpiter. Estos hallazgos ofrecen nuevos conocimientos sobre la dinámica y la estabilidad de la capa climática del gigante gaseoso.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Dinámica de la atmósfera Dinámica de la atmósfera
- Mecánica de fluidos La mecánica de fluidos.
Sus antecedentes:
- La atmósfera de Júpiter exhibe patrones climáticos complejos.
- Las observaciones previas de la Voyager insinuaban ondas de mesoescala.
Objetivo del estudio:
- Para analizar nuevos datos de la nave espacial New Horizons con respecto a los fenómenos atmosféricos de Júpiter.
- Para investigar la estabilidad y la dinámica de la capa climática de Júpiter.
Principales métodos:
- Instrumentos utilizados en la nave espacial New Horizons para las observaciones atmosféricas.
- Se analizaron datos de ondas de mesoescala a altas resoluciones espaciales (11-45 km).
- Se llevaron a cabo mediciones espectrales infrarrojas en múltiples rotaciones de Júpiter (resolución de 200-140 km).
Principales resultados:
- Se observaron ondas mesoescalares con longitudes de onda de 300 km y velocidades de fase que exceden el flujo local en 100 m/s.
- Se detectaron nubes de hielo de amoníaco transitorias con vidas inferiores a 40 horas en regiones de surgencia.
- Estos fenómenos proporcionan información sobre la dinámica atmosférica por debajo de las nubes visibles.
Conclusiones:
- La dinámica de ondas observada desafía los modelos atmosféricos existentes.
- Las nubes transitorias de amoníaco indican procesos de transporte vertical activos.
- Los datos de New Horizons mejoran la comprensión de los procesos atmosféricos de Júpiter.
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