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La nucleación de partículas en la capa límite tropical y su acoplamiento a fuentes marinas de azufre
1A. D. Clarke, V. N. Kapustin, K. Moore, M. Litchy, School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI, USA. D. Davis, F. Eisele, G. Chen, School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atl.
Science (New York, N.Y.)
|October 2, 1998
Resumen
La formación de nuevas partículas en la capa límite marina estaba vinculada al ciclo natural del azufre. Este estudio proporciona la evidencia más clara hasta la fecha de la nucleación de aerosoles y el crecimiento impulsado por los compuestos de azufre marinos.
Área de la Ciencia:
- Química de la atmósfera química de la atmósfera
- Ciencia de los aerosoles marinos Ciencia de los aerosoles marinos
- Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- La formación de nuevas partículas (NPF) es un proceso clave que influye en el clima.
- La capa límite marina (MBL) es una fuente significativa de aerosoles atmosféricos.
- Comprender el NPF en la MBL es crucial para el modelado climático.
Objetivo del estudio:
- Para caracterizar el NPF en un MBL tropical.
- Investigar el vínculo entre el NPF y el ciclo del azufre marino.
- Para probar la aplicabilidad de las teorías de nucleación en el MBL.
Principales métodos:
- Mediciones en tiempo real de compuestos atmosféricos clave (por ejemplo, dimetilsulfuro, dióxido de azufre, ácido sulfúrico).
- Monitoreo de los parámetros meteorológicos (temperatura, humedad relativa).
- Caracterización in situ del aerosol (tamaño, distribución numérica, área de superficie).
Principales resultados:
- NPF observado y el posterior crecimiento de aerosoles en el MBL tropical.
- Existe una fuerte correlación entre los eventos del NPF y los compuestos de azufre marinos.
- La nucleación se produjo en condiciones en las que la teoría de la nucleación binaria no predijo ninguna.
Conclusiones:
- El ciclo natural de azufre marino es un conductor primario de NPF en el MBL.
- Este estudio proporciona la demostración más clara de la nucleación y el crecimiento de aerosoles impulsados por azufre.
- Es posible que las teorías de nucleación existentes no capturen completamente las condiciones de MBL.
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