Research Article

Response of a Deciduous Forest to the Mount Pinatubo Eruption: Enhanced Photosynthesis

Science  28 Mar 2003:
Vol. 299, Issue 5615, pp. 2035-2038
DOI: 10.1126/science.1078366

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Abstract

Volcanic aerosols from the 1991 Mount Pinatubo eruption greatly increased diffuse radiation worldwide for the following 2 years. We estimated that this increase in diffuse radiation alone enhanced noontime photosynthesis of a deciduous forest by 23% in 1992 and 8% in 1993 under cloudless conditions. This finding indicates that the aerosol-induced increase in diffuse radiation by the volcano enhanced the terrestrial carbon sink and contributed to the temporary decline in the growth rate of atmospheric carbon dioxide after the eruption.

  • * To whom correspondence should be addressed. E-mail: lianhong-gu{at}ornl.gov

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