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Respuesta de un bosque caducifolio a la erupción del Monte Pinatubo: fotosíntesis mejorada
Lianhong Gu1, Dennis D Baldocchi, Steve C Wofsy
1Environmental Sciences Division, Building 1509, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6335, USA. lianhong-gu@ornl.gov
Science (New York, N.Y.)
|March 29, 2003
Resumen
La erupción del Monte Pinatubo en el año 1991.
Área de la Ciencia:
- Ciencias atmosféricas y ecología.
- Volcanología e impactos climáticos.
Sus antecedentes:
- La erupción del Monte Pinatubo en 1991 inyectó enormes cantidades de aerosoles volcánicos en la estratosfera.
- Estos aerosoles alteraron significativamente los presupuestos globales de radiación durante varios años después de la erupción.
Objetivo del estudio:
- Para cuantificar el impacto del aumento de la radiación difusa en la fotosíntesis forestal.
- Evaluar el papel de los aerosoles volcánicos en la modulación del sumidero de carbono terrestre.
Principales métodos:
- Se utilizaron estimaciones basadas en el aumento de la radiación difusa.
- Se analizaron los efectos sobre la fotosíntesis al mediodía en condiciones de claridad de las nubes en un bosque caducifolio.
Principales resultados:
- La mejora de la radiación difusa condujo a un aumento del 23% en la fotosíntesis en 1992 y del 8% en 1993.
- Esto sugiere un aumento significativo de la capacidad de sumidero de carbono terrestre.
Conclusiones:
- El aumento de la radiación difusa inducida por aerosoles volcánicos puede aumentar la absorción de carbono terrestre.
- Este fenómeno redujo temporalmente la tasa de crecimiento del dióxido de carbono atmosférico después de la erupción.
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