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| Titel |
HESFIRE: a global fire model to explore the role of anthropogenic and weather drivers |
| VerfasserIn |
Y. Le Page, D. Morton, B. Bond-Lamberty, J. M. C. Pereira, G. Hurtt |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 12, no. 3 ; Nr. 12, no. 3 (2015-02-13), S.887-903 |
| Datensatznummer |
250117813
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| Publikation (Nr.) |
 copernicus.org/bg-12-887-2015.pdf |
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| Zusammenfassung |
| Vegetation fires are a major driver of ecosystem dynamics and
greenhouse gas emissions. Anticipating potential changes in fire activity
and their impacts relies first on a realistic model of fire activity (e.g.,
fire incidence and interannual variability) and second on a model
accounting for fire impacts (e.g., mortality and emissions). In this paper,
we focus on our understanding of fire activity and describe a new fire
model, HESFIRE (Human–Earth System FIRE), which integrates the influence of weather, vegetation
characteristics, and human activities on fires in a stand-alone framework. It
was developed with a particular emphasis on allowing fires to spread over
consecutive days given their major contribution to burned areas in many
ecosystems. A subset of the model parameters was calibrated through an
optimization procedure using observation data to enhance our knowledge of
regional drivers of fire activity and improve the performance of the model
on a global scale. Modeled fire activity showed reasonable agreement with
observations of burned area, fire seasonality, and interannual variability
in many regions, including for spatial and temporal domains not included in
the optimization procedure. Significant discrepancies are investigated, most
notably regarding fires in boreal regions and in xeric ecosystems and also
fire size distribution. The sensitivity of fire activity to model parameters
is analyzed to explore the dominance of specific drivers across regions and
ecosystems. The characteristics of HESFIRE and the outcome of its evaluation
provide insights into the influence of anthropogenic activities and weather, and
their interactions, on fire activity. |
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