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Carbono de hollín y exceso de potasio fino: transporte de larga distancia de aerosoles derivados de la combustión
Science (New York, N.Y.)
|June 10, 1983
Resumen
La quema de biomasa tropical es una fuente importante de carbono atmosférico de hollín, comparable a los niveles continentales rurales. Una nueva proporción ayuda a distinguir la biomasa de las fuentes de combustibles fósiles.
Área de la Ciencia:
- Química de la atmósfera química de la atmósfera
- Ciencias del medio ambiente Ciencias del medio ambiente.
- Ciencia de los aerosoles Ciencia de los aerosoles.
Sus antecedentes:
- Las muestras de aerosoles se recolectaron durante un crucero de Hamburgo a Montevideo.
- Estas muestras representaban masas de aire de diversas regiones, incluidas Europa, el Sahara, África tropical, América del Sur y áreas oceánicas abiertas.
Objetivo del estudio:
- Investigar las fuentes y la composición de los aerosoles de carbono de hollín en la remota atmósfera atlántica.
- Identificar indicadores para diferenciar entre la quema de biomasa y combustibles fósiles como fuentes de carbono de hollín.
Principales métodos:
- Análisis de muestras de aerosol recolectadas en varias regiones atmosféricas.
- Se utilizó el análisis de trayectoria hacia atrás para determinar los orígenes de las masas de aire.
- Se midieron las concentraciones de carbono de hollín, carbono fino total y exceso de potasio fino.
Principales resultados:
- Se encontraron concentraciones significativas de carbono de hollín en grandes áreas del remoto Atlántico, similares a los niveles continentales rurales.
- La quema de biomasa en las regiones tropicales se identificó como una fuente clave de carbono atmosférico de hollín.
- La relación entre el exceso de potasio fino y el carbono de hollín en los aerosoles puede indicar las contribuciones relativas de la biomasa frente a la quema de combustibles fósiles.
Conclusiones:
- La quema de biomasa contribuye significativamente a los aerosoles de carbono de hollín global.
- La relación entre el exceso de potasio y el carbono del hollín es un indicador valioso para la distribución de la fuente de los aerosoles de hollín.
- El carbono orgánico particulado en la atmósfera atlántica es en gran parte de origen continental.
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