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Tendencia a largo plazo a la baja en la irradiación solar total
Science (New York, N.Y.)
|November 28, 1986
Resumen
El Monitor de Irradiación del Radiómetro de Cavidad Activa (ACRIM I) observó una disminución de la irradiación solar del 0,019% anual desde 1980 hasta 1985. Esta tendencia, vinculada a la actividad magnética solar, fue verificada por múltiples mediciones independientes.
Área de la Ciencia:
- Física solar Física solar es la física de la energía solar.
- Ciencias de la Tierra Ciencias de la Tierra
- Física del espacio Física del espacio.
Sus antecedentes:
- La irradiación solar total (TSI) es un factor clave del clima de la Tierra.
- Comprender las variaciones de la ETI a largo plazo es crucial para el modelado climático.
- Las misiones satelitales anteriores proporcionaron datos limitados de la ETI a largo plazo.
Objetivo del estudio:
- Para analizar los primeros cinco años de ACRIM I datos de irradiación solar total.
- Identificar y cuantificar cualquier tendencia en la irradiación solar durante este período.
- Investigar las posibles causas de las variaciones observadas en la irradiación solar.
Principales métodos:
- Se utilizaron datos del Monitor de Irradiación del Radiómetro de Cavidad Activa (ACRIM I) en la nave espacial de la Misión Máxima Solar.
- Validación cruzada de los hallazgos de ACRIM I con autocalibraciones internas.
- Comparó los datos de ACRIM I con mediciones independientes de cohetes de sondeo, globos y la nave espacial Nimbus-7.
Principales resultados:
- Se detectó una tendencia a la baja estadísticamente significativa en la irradiación solar total.
- La tendencia observada indicó una disminución de -0.019% por año.
- La existencia de la tendencia fue corroborada por múltiples fuentes de datos independientes.
Conclusiones:
- La luminosidad del Sol exhibió variaciones imprevistas en escalas de tiempo de varios años.
- Estas variaciones pueden estar asociadas con el ciclo solar y su actividad magnética asociada.
- Los datos de ACRIM I proporcionaron información crucial sobre la variabilidad solar y sus posibles implicaciones climáticas.
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