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Las corrientes atmosféricas de Júpiter se extienden a miles de kilómetros de profundidad
Y Kaspi1, E Galanti1, W B Hubbard2
1Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot 76100, Israel.
Nature
|March 9, 2018
Resumen
Las poderosas corrientes en chorro de Júpiter alcanzan miles de kilómetros de profundidad, extendiéndose a la región de disipación magnética del planeta. Los datos de gravedad de la nave espacial Juno revelan la atmósfera dinámica
Área de la Ciencia:
- Ciencias planetarias
- Dinámica de fluidos
- La geofísica
Sus antecedentes:
- Las corrientes en chorro este-oeste de Júpiter son una característica prominente, pero su extensión vertical ha permanecido desconocida.
- Comprender los flujos atmosféricos y interiores profundos es crucial para comprender la estructura y la evolución de Júpiter.
Objetivo del estudio:
- Para determinar la profundidad de las corrientes de chorro observadas en Júpiter.
- Para investigar la relación entre el campo de gravedad de Júpiter y su dinámica atmosférica / interior.
Principales métodos:
- Análisis de las mediciones gravitacionales de la nave espacial Juno.
- Inversión de los datos de gravedad para obtener campos de viento y perfiles de flujo atmosférico.
- Modelado de la contribución de la estructura interior a los armónicos de la gravedad.
Principales resultados:
- Los armónicos gravitacionales impares (J3, J5, J7, J9) indican que las corrientes de chorro se extienden a profundidades de miles de kilómetros.
- La profundidad de la corriente en chorro probablemente alcanza la región de disipación magnética alrededor de 3.000 km.
- Incluso los armónicos gravitacionales (J8, J10) son consistentes con el perfil de flujo derivado y la estructura interior.
- La atmósfera dinámica de Júpiter constituye aproximadamente el uno por ciento de la masa total del planeta.
Conclusiones:
- Las poderosas corrientes de Júpiter penetran mucho más profundamente de lo que se pensaba.
- Los datos de gravedad de la misión Juno proporcionan una visión sin precedentes del interior profundo y la dinámica atmosférica de Júpiter.
- Los hallazgos refinan los modelos de composición y circulación del planeta gigante gaseoso.
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