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Una gran carga de aerosoles volcánicos en la estratosfera vinculada al transporte del monzón asiático
Adam E Bourassa1, Alan Robock, William J Randel
1Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, SK, Canada. adam.bourassa@usask.ca
Science (New York, N.Y.)
|July 7, 2012
Resumen
La erupción del volcán Nabro en 2011 inyectó dióxido de azufre en la troposfera superior, lo que condujo a una mejora de los aerosoles estratosféricos. Esto demuestra que las erupciones volcánicas pueden impactar el clima sin llegar directamente a la estratosfera.
Área de la Ciencia:
- Volcanología Volcanología.
- Ciencias de la atmósfera Ciencias atmosféricas.
- Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- El estratovolcán Nabro entró en erupción el 13 de junio de 2011, en Eritrea.
- Esta erupción liberó cantidades significativas de dióxido de azufre (SO2).
Objetivo del estudio:
- Para analizar el transporte atmosférico y la transformación del dióxido de azufre volcánico.
- Comprender el impacto de las erupciones volcánicas en la carga de aerosoles estratosféricos y los posibles efectos climáticos.
Principales métodos:
- Análisis de datos satelitales para rastrear la dispersión de plumas de SO2.
- Modelado de la convección atmosférica y la circulación del monzón.
- Observación de la formación de aerosoles de sulfato y su aumento en la estratosfera.
Principales resultados:
- Aproximadamente 1.3 teragramas de SO2 fueron inyectados en la parte superior de la troposfera (9-14 km).
- La convección profunda y la circulación del monzón de verano asiático transportaron SO2 a la estratosfera inferior.
- Se observó una mejora significativa de los aerosoles de sulfato en la estratosfera.
Conclusiones:
- Las erupciones volcánicas pueden influir en el clima inyectando azufre en la troposfera superior.
- Los mecanismos de lofting indirectos, como la convección profunda y la circulación del monzón, son cruciales para la mejora de los aerosoles estratosféricos.
- Las erupciones no necesitan inyectar azufre directamente en la estratosfera para afectar el clima.
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