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Polvo asiático: transporte estacional a las islas hawaianas
Science (New York, N.Y.)
|April 8, 1983
Resumen
El polvo asiático tiene un impacto significativo en la calidad del aire de Hawai, con eventos de polvo asiático que aumentan las concentraciones de aluminio en diez veces en la primavera. Este polvo constituye el 80% de las partículas atmosféricas anuales en el Observatorio Mauna Loa.
Área de la Ciencia:
- Ciencias de la atmósfera ciencia atmosférica.
- Ciencias ambientales Ciencias ambientales.
- La geoquímica es la geoquímica.
Sus antecedentes:
- Las partículas atmosféricas en el Observatorio Mauna Loa proporcionan información sobre el transporte de largo alcance.
- Comprender la composición de las partículas atmosféricas es crucial para los estudios del clima y la calidad del aire.
Objetivo del estudio:
- Para analizar la composición de las partículas atmosféricas en el Observatorio Mauna Loa.
- Para identificar las variaciones estacionales y las fuentes de polvo atmosférico.
Principales métodos:
- Análisis de partículas atmosféricas recolectadas entre febrero de 1979 y septiembre de 1982.
- Medición de las concentraciones de elementos de la corteza terrestre, específicamente el aluminio.
Principales resultados:
- Fuertes aflujos de polvo asiático se observan anualmente durante la primavera (febrero-junio).
- Las concentraciones de aluminio fueron más de diez veces más altas durante la primavera (71 +/- 51 ng/m3) en comparación con otros períodos (6.7 +/- 2.3 ng/m3).
- El material de la corteza de los episodios de polvo comprendió un promedio del 80% de la masa total anual de partículas.
Conclusiones:
- El polvo asiático de primavera contribuye significativamente a la carga de partículas atmosféricas en el Mauna Loa.
- El transporte atmosférico de largo alcance juega un papel importante en la composición de partículas estacionales en los observatorios de gran altitud.
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