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Observaciones desde tierra de la mancha polar norte y el hexágono de Saturno
Science (New York, N.Y.)
|April 16, 1993
Resumen
El vórtice polar y la estructura de onda hexagonal de Saturno exhiben estabilidad a largo plazo. Las observaciones revelan la mancha polar.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Dinámica de la atmósfera Dinámica de la atmósfera
- El sistema Saturniano es el sistema de Saturno.
Sus antecedentes:
- La región polar norte de Saturno alberga fenómenos atmosféricos persistentes: el vórtice polar y la estructura de ondas hexagonal.
- Estas características fueron descubiertas por primera vez aproximadamente una década antes del período de observación 1990-1991.
Objetivo del estudio:
- Para monitorear los cambios de posición y la dinámica del vórtice polar y la estructura de onda hexagonal de Saturno.
- Para analizar la deriva a largo plazo y la estabilidad de estas características polares.
Principales métodos:
- Realizó observaciones terrestres de las características del polo norte de Saturno desde julio de 1990 hasta octubre de 1991.
- Se analizaron datos posicionales relativos a la longitud del Sistema III de Saturno.
- Combinó los nuevos datos con las observaciones históricas de las Voyager 1 y 2 (1980-1981) para un análisis de 11 años.
Principales resultados:
- La mancha polar exhibió una deriva promedio de -0.0353 grados por día en relación con el Sistema III durante 1990-1991.
- Las excursiones longitudinales a corto plazo de hasta 14 grados se produjeron a tasas de hasta 1 grado por día.
- También se observaron variaciones latitudinales irregulares en la ubicación de la mancha polar.
- Durante el intervalo de 11 años (1980-1991), la mancha polar mostró una deriva promedio de -0,0577 grados por día.
Conclusiones:
- Tanto el vórtice polar como la estructura de onda hexagonal demuestran una longevidad notable.
- Estas características parecen resistentes a las variaciones estacionales significativas en el calentamiento de la atmósfera superior.
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