Global transport of volcanic aerosol from El Chichon eruption studied with a three-dimensional circulation model
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Para estudiar la dispersión global de la nube volcánica de la erupción de El Chichón utilizarnos el modelo tridimensional de circulación de la estratosfera desarrollado en el MIT-GIT. El modelo dependiente del tiempo se corrió para cuatro meses hasta fines de octubre de 1982. El inicio se proporcionó mediante las mediciones de la distribución del aerosol en latitud y altitud. La comparación de los resultados con los datos experimentales hecha los días 105 y 120 a partir del comienzo de la simulación muestra una concordancia razonable, si bien la concentración resultante del modelo está recorrida hacia arriba debido a que no se toma en cuenta la velocidad de sedimentación de las partículas. Se presentan también las medias mensuales de la sección latitud-longitud de la tasa de extinción, que muestran considerable heterogeneidad. Se utilizó un cÓdigo de dispersión radiativa múltiple para valorar las tasas de calentamiento introducidas por un 75 % de aerosol de ácido sulfúrico. En el primer mes se predijo un aumento de hasta 2° en la temperatura.
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