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Las retroalimentaciones de la atmósfera del lago asociadas con los paleolakes Bonneville y Lahontan
Science (New York, N.Y.)
|February 4, 1994
Resumen
La humedad atmosférica alimentó principalmente los grandes lagos del Pleistoceno en la Gran Cuenca. Las interacciones locales entre el lago y la atmósfera también influyeron en el lago Bonneville.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Ciencias de la atmósfera Ciencias atmosféricas.
- Hidrología Hidrología Hidrología.
Sus antecedentes:
- La Gran Cuenca contó con grandes lagos del Pleistoceno, incluyendo el Lago Lahontan y el Lago Bonneville.
- Comprender las antiguas interacciones entre el lago y la atmósfera es crucial para la reconstrucción del paleoclima.
Objetivo del estudio:
- Para investigar las interacciones atmosféricas e hidrológicas con los grandes lagos del Pleistoceno en la Gran Cuenca.
- Determinar las fuentes primarias de humedad de estos antiguos lagos hace 18.000 años.
Principales métodos:
- Utilizó un modelo climático regional de alta resolución anidado dentro de un modelo de circulación general.
- Realizó simulaciones climáticas para enero y julio, 18.000 años antes del presente.
Principales resultados:
- La circulación atmosférica a escala sinóptica fue la principal fuente de humedad tanto para el lago Lahontan como para el lago Bonneville.
- Las precipitaciones generadas por el lago contribuyeron significativamente al presupuesto hidrológico del lago Bonneville.
- La evidencia sugiere que los bucles de retroalimentación entre el lago local y la atmósfera influyeron en el tamaño de los lagos.
Conclusiones:
- El suministro de humedad atmosférica fue clave para la hidrología de los lagos de la Gran Cuenca del Pleistoceno.
- El reciclaje local de la humedad jugó un papel notable, particularmente para el lago Bonneville.
- Estas interacciones pueden explicar las diferencias observadas en los antiguos tamaños de los lagos.
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