期刊
QUATERNARY RESEARCH
卷 67, 期 2, 页码 304-310出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1016/j.yqres.2006.10.004
关键词
charcoal analysis; charcoal dispersal; charcoal source area; dispersal model; experimental burn; fire history
To aid interpreting the source area of charcoal in lake-sediment records, we compare charcoal deposition from an experimental fire to predictions from a particle dispersal model. This provides both a theoretical framework for understanding how lake sediments reflect fire history and a foundation for simulating sediment-charcoal records. The dispersal model captures the two-dimensional patterns in the empirical data (predicted vs. observed r(2)=0.67, p < 0.001). We further develop the model to calculate the potential charcoal source area (PCSA) for several classes of fires. Results suggest that (1) variations in airborne charcoal deposition can be explained largely by the size of PCSAs relative to fire sizes and (2) macroscopic charcoal travels many kilometers, longer than suggested by dispersal data from experimental fires but consistent with dispersal data from uncontrolled fires. (c) 2006 University of Washington. All rights reserved.
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