Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14287 |
Cross-scale controls on carbon emissions from boreal forest megafires | |
Walker, Xanthe J.1; Rogers, Brendan M.2; Baltzer, Jennifer L.3; Cumming, Steven G.4; Day, Nicola J.3; Goetz, Scott J.1,2,5; Johnstone, Jill F.6; Schuur, Edward A. G.1; Turetsky, Merritt R.7; Mack, Michelle C.1 | |
2018-09-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:9页码:4251-4265 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | Climate warming and drying is associated with increased wildfire disturbance and the emergence of megafires in North American boreal forests. Changes to the fire regime are expected to strongly increase combustion emissions of carbon (C) which could alter regional C balance and positively feedback to climate warming. In order to accurately estimate C emissions and thereby better predict future climate feedbacks, there is a need to understand the major sources of heterogeneity that impact C emissions at different scales. Here, we examined 211 field plots in boreal forests dominated by black spruce (Picea mariana) or jack pine (Pinus banksiana) of the Northwest Territories (NWT), Canada after an unprecedentedly large area burned in 2014. We assessed both aboveground and soil organic layer (SOL) combustion, with the goal of determining the major drivers in total C emissions, as well as to develop a high spatial resolution model to scale emissions in a relatively understudied region of the boreal forest. On average, 3.35kgCm(-2) was combusted and almost 90% of this was from SOL combustion. Our results indicate that black spruce stands located at landscape positions with intermediate drainage contribute the most to C emissions. Indices associated with fire weather and date of burn did not impact emissions, which we attribute to the extreme fire weather over a short period of time. Using these results, we estimated a total of 94.3TgC emitted from 2.85Mha of burned area across the entire 2014 NWT fire complex, which offsets almost 50% of mean annual net ecosystem production in terrestrial ecosystems of Canada. Our study also highlights the need for fine-scale estimates of burned area that represent small water bodies and regionally specific calibrations of combustion that account for spatial heterogeneity in order to accurately model emissions at the continental scale. |
英文关键词 | black spruce carbon combustion fire severity jack pine Picea mariana Pinus banksiana taiga plains taiga shield |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441746900030 |
WOS关键词 | INTERIOR ALASKA ; FIRE REGIME ; CLIMATE-CHANGE ; NORTH-AMERICA ; ARCTIC TUNDRA ; BLACK SPRUCE ; SEVERITY ; DYNAMICS ; PATTERNS ; VULNERABILITY |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16793 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA; 2.Woods Hole Res Ctr, Falmouth, MA USA; 3.Wilfrid Laurier Univ, Biol Dept, Waterloo, ON, Canada; 4.Univ Laval, Dept Wood & Forest Sci, Quebec City, PQ, Canada; 5.No Arizona Univ, SICCS, Flagstaff, AZ 86011 USA; 6.Univ Saskatchewan, Dept Biol, Saskatoon, SK, Canada; 7.Univ Guelph, Dept Integrat Biol, Guelph, ON, Canada |
推荐引用方式 GB/T 7714 | Walker, Xanthe J.,Rogers, Brendan M.,Baltzer, Jennifer L.,et al. Cross-scale controls on carbon emissions from boreal forest megafires[J]. GLOBAL CHANGE BIOLOGY,2018,24(9):4251-4265. |
APA | Walker, Xanthe J..,Rogers, Brendan M..,Baltzer, Jennifer L..,Cumming, Steven G..,Day, Nicola J..,...&Mack, Michelle C..(2018).Cross-scale controls on carbon emissions from boreal forest megafires.GLOBAL CHANGE BIOLOGY,24(9),4251-4265. |
MLA | Walker, Xanthe J.,et al."Cross-scale controls on carbon emissions from boreal forest megafires".GLOBAL CHANGE BIOLOGY 24.9(2018):4251-4265. |
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