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Las mediciones de Galileo Doppler de los vientos de zona profunda en Júpiter
1D. H. Atkinson, University of Idaho, Moscow, ID 83844, USA. J. B. Pollack, NASA Ames Research Center, Moffett Field, CA 94035, USA. A. Seiff, San Jose State University Foundation, NASA Ames Research Center, Moffett Field, CA 94035, USA.
Science (New York, N.Y.)
|May 10, 1996
Resumen
Las mediciones de la sonda Galileo revelaron que Júpiter es Júpiter.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Dinámica de la atmósfera Dinámica de la atmósfera
- Júpiter Meteorología Meteorología de Júpiter
Sus antecedentes:
- Comprender la circulación atmosférica profunda de Júpiter es crucial para la ciencia planetaria.
- Los modelos anteriores de los vientos de Júpiter estaban limitados por los datos de observación, especialmente por debajo de las nubes.
Objetivo del estudio:
- Para medir directamente la velocidad de los vientos zonales de Júpiter debajo de las nubes visibles.
- Para proporcionar datos que restrinjan los modelos dinámicos de la atmósfera profunda de Júpiter.
Principales métodos:
- Se analizaron los desplazamientos Doppler en la frecuencia portadora del relé de la sonda Galileo.
- Los cambios de frecuencia correlacionados con la velocidad de la sonda para inferir la velocidad del viento.
- Velocidades del viento determinadas a una altitud correspondiente a 24 bares de presión.
Principales resultados:
- Se detectó un efecto Doppler medible causado por vientos zonales que impactan con la sonda Galileo.
- Se midieron vientos de zona profundos que eran progresados y fuertes.
- Se registraron velocidades de viento sostenidas de 190-200 metros por segundo en el nivel de presión de 24 bares.
Conclusiones:
- La profundidad medida y la fuerza de los vientos zonales de Júpiter limitan significativamente el modelado dinámico atmosférico.
- Estos hallazgos desafían y comienzan a descartar muchas teorías existentes de clima poco profundo para Júpiter.
- Las mediciones directas del viento proporcionan datos críticos para refinar nuestra comprensión de los procesos atmosféricos de Júpiter.
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