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Perfiles verticales de aerosol hemisférico: impactos antropogénicos en la profundidad óptica y núcleos de nubes
Antony Clarke1, Vladimir Kapustin
1School of Ocean and Earth Science and Technology (SOEST), University of Hawaii, Honolulu, HI 96822, USA. tclarke@soest.hawaii.edu
Science (New York, N.Y.)
|September 18, 2010
Resumen
La combustión antropogénica tiene un impacto significativo en la profundidad óptica del aerosol (AOD) y las nubes. Este estudio revela que las mejoras de los aerosoles vinculados a la combustión afectan a los modelos climáticos y los datos satelitales, cruciales para comprender el cambio climático global.
Área de la Ciencia:
- Ciencias de la atmósfera Ciencias atmosféricas.
- Ciencias del clima Ciencias del clima Ciencias del clima
- Ciencia de los aerosoles Ciencia de los aerosoles.
Sus antecedentes:
- La combustión antropogénica influye en las propiedades de los aerosoles atmosféricos.
- Los perfiles precisos de aerosoles son esenciales para comprender el forzamiento radiativo del clima.
- Los estudios anteriores carecían de datos completos sobre el perfil regional de los aerosoles.
Objetivo del estudio:
- Para analizar los perfiles verticales de aerosoles de las campañas aéreas del hemisferio Pacífico.
- Para cuantificar el impacto de la combustión en las características del aerosol.
- Para vincular los aerosoles de combustión con los núcleos de condensación de nubes (CCN) y la profundidad óptica del aerosol (AOD).
Principales métodos:
- Análisis de más de 1000 perfiles verticales de aerosoles de 11 campañas aéreas.
- Correlación de las propiedades del aerosol (dispersión, masa, número) con el monóxido de carbono.
- Evaluación de las mejoras regionales de aerosoles en comparación con las áreas no perturbadas.
Principales resultados:
- Se observaron mejoras regionales de aerosoles vinculadas a la combustión.
- Estas mejoras, asociadas con el monóxido de carbono, excedieron a las regiones no perturbadas en más de un orden de magnitud.
- El aumento de la dispersión de la luz del aerosol, la masa y el número estaban vinculados a las fuentes de combustión.
Conclusiones:
- Los aerosoles impulsados por la combustión influyen significativamente en los proxies regionales de AOD y CCN.
- La profundidad óptica del aerosol y los núcleos de condensación de nubes están acoplados y globalmente vinculados a la combustión envejecida.
- Estos hallazgos son vitales para mejorar los modelos climáticos y la recuperación de aerosoles por satélite.
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