期刊
NATURE CLIMATE CHANGE
卷 10, 期 12, 页码 1130-U100出版社
NATURE PORTFOLIO
DOI: 10.1038/s41558-020-00920-8
关键词
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资金
- NASA Arctic Boreal and Vulnerability Experiment (ABoVE) Legacy Carbon grant [NNX15AT71A]
- NSF DEB RAPID [1542150]
- NASA ABoVE grant [NNX15AT83A, NNX15AU56A]
- Joint Fire Science Program [05-1-2-06]
- NSF [0445458, DEB-0423442]
- NSERC
- Government of the Northwest Territories Cumulative Impacts Monitoring Program [170]
- NSERC PDFs
- Laurier-GNWT Partnership Agreement
- Polar Knowledge Canada's Northern Science Training Program
- Netherlands Organization for Scientific Research (NWO)
- Direct For Biological Sciences [0445458] Funding Source: National Science Foundation
- Division Of Environmental Biology [0445458] Funding Source: National Science Foundation
- NASA [797692, NNX15AT83A, 802425, NNX15AT71A] Funding Source: Federal RePORTER
- NERC [NE/N009495/1] Funding Source: UKRI
Carbon (C) emissions from wildfires are a key terrestrial-atmosphere interaction that influences global atmospheric composition and climate. Positive feedbacks between climate warming and boreal wildfires are predicted based on top-down controls of fire weather and climate, but C emissions from boreal fires may also depend on bottom-up controls of fuel availability related to edaphic controls and overstory tree composition. Here we synthesized data from 417 field sites spanning six ecoregions in the northwestern North American boreal forest and assessed the network of interactions among potential bottom-up and top-down drivers of C emissions. Our results indicate that C emissions are more strongly driven by fuel availability than by fire weather, highlighting the importance of fine-scale drainage conditions, overstory tree species composition and fuel accumulation rates for predicting total C emissions. By implication, climate change-induced modification of fuels needs to be considered for accurately predicting future C emissions from boreal wildfires. Carbon emissions from fires are generally modelled and predicted from fire weather and climate. Fuel availability drives carbon emissions more strongly than fire weather in boreal forests, highlighting the importance of ecological dynamics for fire-climate feedbacks.
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