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Temperatura y composición de los puntos calientes polares y el hexágono de Saturno
L N Fletcher1, P G J Irwin, G S Orton
1Atmospheric, Oceanic, and Planetary Physics, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK. fletcher@atm.ox.ac.uk
Science (New York, N.Y.)
|January 5, 2008
Resumen
Los polos de Saturno muestran una sorprendente simetría en vórtices ciclónicos calientes, a pesar de los cambios estacionales en el flujo solar. El agotamiento del gas fosfina en los núcleos de vórtice sugiere un hundimiento atmosférico, que afecta a la atmósfera superior.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Ciencias de la atmósfera Ciencias atmosféricas.
- Dinámica de fluidos La dinámica de fluidos.
Sus antecedentes:
- Saturno exhibe variaciones estacionales extremas en la insolación solar.
- Las regiones polares de los gigantes gaseosos son zonas atmosféricas dinámicas.
Objetivo del estudio:
- Para investigar la estructura térmica simétrica de los vórtices polares de Saturno.
- Comprender la dinámica atmosférica y la composición de las regiones polares de Saturno.
Principales métodos:
- Análisis de datos térmicos de las regiones polares de Saturno.
- Observación de la composición de la atmósfera, específicamente el gas fosfina.
- Caracterización de las corrientes en chorro y las estructuras térmicas asociadas.
Principales resultados:
- Simetría inesperada observada en vórtices polares ciclónicos calientes en ambos polos.
- Los núcleos de vórtice muestran agotamiento en el gas fosfina, lo que indica un hundimiento atmosférico.
- Observación por primera vez de la estructura térmica vinculada al chorro polar hexagonal de Saturno en 77°N.
- Se identificaron patrones hexagonales tanto en el cinturón ciclónico cálido (79°N) como en la zona anticiclónica fría (75°N).
Conclusiones:
- Las dinámicas atmosféricas polares de Saturno muestran un alto grado de simetría.
- El agotamiento de la fosfina es un indicador clave del movimiento vertical del aire en los vórtices polares.
- La estructura hexagonal de la corriente en chorro es una característica significativa del clima polar de Saturno.
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