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| Titel |
Controls on fire activity over the Holocene |
| VerfasserIn |
S. Kloster, T. Brücher, V. Brovkin, S. Wilkenskjeld |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 11, no. 5 ; Nr. 11, no. 5 (2015-05-27), S.781-788 |
| Datensatznummer |
250117286
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| Publikation (Nr.) |
 copernicus.org/cp-11-781-2015.pdf |
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| Zusammenfassung |
Changes in fire activity over the last 8000 years are simulated with
a global fire model driven by changes in climate and vegetation cover. The
changes were separated into those caused through variations in fuel
availability, fuel moisture or wind speed, which react differently to changes
in climate. Disentangling these controlling factors helps in understanding the
overall climate control on fire activity over the Holocene.
Globally the burned area is simulated to increase by 2.5% between 8000
and 200 cal yr BP, with larger regional changes compensating nearly evening out on a global
scale. Despite the absence of anthropogenic fire ignitions, the simulated
trends in fire activity agree reasonably well with continental-scale
reconstructions from charcoal records, with the exception of Europe. For some
regions the change in fire activity is predominantly controlled through
changes in fuel availability (Australia monsoon, Central America
tropics/subtropics). For other regions changes in fuel moisture are more
important for the overall trend in fire activity (North America, Sub-Saharan
Africa, Europe, Asia monsoon). In Sub-Saharan Africa, for example, changes in
fuel moisture alone lead to an increase in fire activity between 8000 and
200 cal yr BP, while changes in fuel availability lead to a decrease.
Overall, the fuel moisture control is dominating the simulated fire activity
for Sub-Saharan Africa.
The simulations clearly demonstrate that both changes in fuel availability
and changes in fuel moisture are important drivers for the fire activity over
the Holocene. Fuel availability and fuel moisture do, however, have different
climate controls. As such, observed changes in fire activity cannot be
related to single climate parameters such as precipitation or temperature
alone. Fire models, as applied in this study, in combination with
observational records can help in understanding the climate control on fire
activity, which is essential to project future fire activity. |
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