Pre-industrial particulate emissions and carbon sequestration from biomass burning in North America |
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Authors: | J. S. Clark P. D. Royall |
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Affiliation: | (1) Department of Botany, Duke University, 27706 Durham, NC, USA;(2) Department of Geography, University of Tennessee, 37996 Knoxville, TN, USA |
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Abstract: | Spatial trends in pre-industrial biomass burning emissions for eastern North America were reconstructed from sediment charcoal data. Petrographic thin sections were prepared from varved lake sediments along a transect of sites extending from NW Minnesota eastward to NE Maine. Results showed an exponential decline in charcoal abundance with distance east from the prairie/forest border. This result quantifies burning along the broad climate/vegetation gradient from xeric woodland to mesic eastern deciduous forest. Post-settlement charcoal accumulation showed no such geographic pattern, varying from site-to-site, likely reflecting local variability in land use and combustion sources. Results suggest the total emissions of large (> 10 m diameter) charcoal particles decreased by a factor of three during the twentieth century. |
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Keywords: | biomass burning carbon sequestration charcoal fire emissions |
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