comparing modelled fire dynamics with charcoal records for the holocene
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2014
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Abstract
An earth system model of intermediate complexity (CLIMate and BiosphERe – CLIMBER-2) and a land
surface model (JSBACH), which dynamically represent vegetation, are used to
simulate natural fire dynamics through the last 8000 yr. Output variables of
the fire model (burned area and fire carbon emissions) are used to compare
model results with sediment-based charcoal reconstructions. Several
approaches for processing model output are also tested. Charcoal data are
reported in Z-scores with a base period of 8000–200 BP in order to
exclude the strong anthropogenic forcing of fire during the last two
centuries. The model–data comparison reveals a robust correspondence in fire
activity for most regions considered, while for a few regions, such as
Europe, simulated and observed fire histories show different trends. The
difference between modelled and observed fire activity may be due to the
absence of anthropogenic forcing (e.g. human ignitions and suppression) in
the model simulations, and also due to limitations inherent to modelling fire
dynamics. The use of spatial averaging (or Z-score processing) of model
output did not change the directions of the trends. However, Z-score-transformed
model output resulted in higher rank correlations with the
charcoal Z-scores in most regions. Therefore, while both metrics are
useful, processing model output as Z-scores is preferable to areal
averaging when comparing model results to transformed charcoal records.
| Reference Key |
brcher2014climatecomparing
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|---|---|
| Authors | ;T. Brücher;V. Brovkin;S. Kloster;J. R. Marlon;M. J. Power |
| Journal | proceedings - 16th ieee/acis international conference on computer and information science, icis 2017 |
| Year | 2014 |
| DOI |
10.5194/cp-10-811-2014
|
| URL | |
| Keywords |
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