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Global patterns of interannual climate-fire relationships.
John T Abatzoglou1, A Park Williams2, Luigi Boschetti3
1Department of Geography, University of Idaho, Moscow, Idaho.
Global Change Biology
|July 27, 2018
Summary
Global climate variability significantly influences fire activity, explaining one-third of burned area changes annually. Fuel aridity and precipitation patterns are key drivers, with varying impacts across different ecosystems.
Area of Science:
- Ecology
- Environmental Science
- Climate Science
Background:
- Global fire activity is shaped by climate, vegetation, and human influences.
- Understanding the impact of climate variability on interannual burned area is crucial but less understood.
Purpose of the Study:
- To examine global interannual climate-fire relationships at ecoregion scales using satellite data.
- To determine the extent to which climate variability explains global burned area fluctuations.
Main Methods:
- Analysis of two decades of satellite-derived burned area records.
- Examination of global fire-climate relationships across forested and nonforested ecoregions.
- Correlation analysis using fuel aridity and antecedent precipitation measures.
Main Results:
- Fuel aridity strongly correlated with forested burned area, while antecedent precipitation correlated with nonforested burned area.
- Climate variability explained approximately one-third of the interannual variability in global burned area.
- Relationships between climate and burned area varied, with weaker links in drier regions and where anthropogenic factors are significant.
Conclusions:
- Climate variability is a major global enabler of fire activity.
- Regional differences in climate-fire relationships highlight the interplay of climatic, vegetation, and human factors.
- Integrating empirical and process-based models is essential for predicting future fire activity.
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