A human-driven decline in global burned area
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Abstract
Fire is an essential Earth system process that alters ecosystem and atmospheric composition. Here we assessed long-term fire trends using multiple satellite data sets. We found that global burned area declined by 24.3 ± 8.8% over the past 18 years. The estimated decrease in burned area remained robust after adjusting for precipitation variability and was largest in savannas. Agricultural expansion and intensification were primary drivers of declining fire activity. Fewer and smaller fires reduced aerosol concentrations, modified vegetation structure, and increased the magnitude of the terrestrial carbon sink. Fire models were unable to reproduce the pattern and magnitude of observed declines, suggesting that they may overestimate fire emissions in future projections. Using economic and demographic variables, we developed a conceptual model for predicting fire in human-dominated landscapes.
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The record
- Venue
- Science
- Topic
- Fire effects on ecosystems
- Field
- Environmental Science
- Canadian institutions
- Environment and Climate Change Canada
- Funders
- Nederlandse Organisatie voor Wetenschappelijk OnderzoekGraduate School, University of MarylandNational Natural Science Foundation of ChinaNational Aeronautics and Space AdministrationEuropean Space AgencyGordon and Betty Moore FoundationNational Science Foundation
- Keywords
- Environmental scienceEcosystemVegetation (pathology)Physical geographyPrecipitationGlobal changeSink (geography)Fire regimeCarbon sinkAtmospheric sciencesClimatologyEcologyClimate changeGeographyMeteorologyGeologyBiologyCartography
- Has abstract in OpenAlex
- yes