气候变化领域集成服务门户(CCPortal): Estimating the multi-decadal carbon deficit of burned Amazonian forests

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DOI	10.1088/1748-9326/abb62c
	Estimating the multi-decadal carbon deficit of burned Amazonian forests
	Silva C.V.J.; Aragão L.E.O.C.; Young P.J.; Espirito-Santo F.; Berenguer E.; Anderson L.O.; Brasil I.; Pontes-Lopes A.; Ferreira J.; Withey K.; França F.; Graça P.M.L.A.; Kirsten L.; Xaud H.; Salimon C.; Scaranello M.A.; Castro B.; Seixas M.; Farias R.; Barlow J.
发表日期	2020
ISSN	17489318
卷号	15 期号:11
英文摘要	Wildfires in humid tropical forests have become more common in recent years, increasing the rates of tree mortality in forests that have not co-evolved with fire. Estimating carbon emissions from these wildfires is complex. Current approaches rely on estimates of committed emissions based on static emission factors through time and space, yet these emissions cannot be assigned to specific years, and thus are not comparable with other temporally-explicit emission sources. Moreover, committed emissions are gross estimates, whereas the long-term consequences of wildfires require an understanding of net emissions that accounts for post-fire uptake of CO2. Here, using a 30 year wildfire chronosequence from across the Brazilian Amazon, we calculate net CO2 emissions from Amazon wildfires by developing statistical models comparing post-fire changes in stem mortality, necromass decomposition and vegetation growth with unburned forest plots sampled at the same time. Over the 30 yr time period, gross emissions from combustion during the fire and subsequent tree mortality and decomposition were equivalent to 126.1 Mg CO2 ha−1 of which 73% (92.4 Mg CO2 ha−1) resulted from mortality and decomposition. These emissions were only partially offset by forest growth, with an estimated CO2 uptake of 45.0 Mg ha−1over the same time period. Our analysis allowed us to assign emissions and growth across years, revealing that net annual emissions peak 4 yr after forest fires. At present, Brazil’s National Determined Contribution (NDC) for emissions fails to consider forest fires as a significant source, even though these are likely to make a substantial and long-term impact on the net carbon balance of Amazonia. Considering long-term post-fire necromass decomposition and vegetation regrowth is crucial for improving global carbon budget estimates and national greenhouse gases (GHG) inventories for tropical forest countries. © 2020 The Author(s). Published by IOP Publishing Ltd
英文关键词	CO2 uptake; Combustion; Necromass decomposition; Net emissions; Stem mortality; Tropical forests; Wildfires
语种	英语
scopus关键词	Budget control; Carbon; Carbon dioxide; Deforestation; Fire hazards; Fires; Magnesium; Tropics; Vegetation; Amazonian forests; Brazilian Amazon; Carbon emissions; Emission sources; Greenhouse gases (GHG); Humid tropical forest; Long-term impacts; Vegetation growth; Greenhouse gases; carbon balance; carbon budget; carbon emission; chronosequence; decadal variation; decomposition analysis; forest soil; long-term change; pollutant source; tropical forest; wildfire; Amazonas [Brazil]; Amazonia; Brazil
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153502
作者单位	Lancaster Environment Centre (LEC), Lancaster University, United Kingdom; National Institute for Space Research (INPE), São José dos Campos, Brazil; College of Life and Environmental Sciences, University of Exeter, United Kingdom; Centre of Excellence for Environmental Data Science (CEEDS), Lancaster University, United Kingdom; Leicester Institute of Space and Earth Observation (LISEO), University of Leicester, United Kingdom; Environmental Change Institute, University of Oxford, United Kingdom; National Centre for Monitoring and Early Warning of Natural Disaster (CEMADEN), São José dos Campos, Brazil; Rede de Biodiversidade e Biotecnologia da Amazônia Legal (BIONORTE), Universidade Estadual do Maranhão, São Luiz, Brazil; Brazilian Agricultural Research Corporation, Embrapa Amazônia Oriental, Belém, Brazil; National Institute for Research in Amazonia (INPA), Manaus, Brazil; Brazilian Agricultural Research Corporation, Embrapa Roraima, Brazil; Universidade Estadual da Paraíba, Centro de Ciências Biológicas...
推荐引用方式 GB/T 7714	Silva C.V.J.,Aragão L.E.O.C.,Young P.J.,et al. Estimating the multi-decadal carbon deficit of burned Amazonian forests[J],2020,15(11).
APA	Silva C.V.J..,Aragão L.E.O.C..,Young P.J..,Espirito-Santo F..,Berenguer E..,...&Barlow J..(2020).Estimating the multi-decadal carbon deficit of burned Amazonian forests.Environmental Research Letters,15(11).
MLA	Silva C.V.J.,et al."Estimating the multi-decadal carbon deficit of burned Amazonian forests".Environmental Research Letters 15.11(2020).