Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aa69ce |
Current and future patterns of fire-induced forest degradation in Amazonia | |
De Faria, Bruno L.1,2; Brando, Paulo M.3,4; Macedo, Marcia N.3,4; Panday, Prajjwal K.5; Soares-Filho, Britaldo S.6; Coe, Michael T.3 | |
2017-09-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2017 |
卷号 | 12期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil; USA |
英文摘要 | Amazon droughts directly increase forest flammability by reducing forest understory air and fuel moisture. Droughts also increase forest flammability indirectly by decreasing soil moisture, triggering leaf shedding, branch loss, and tree mortality-all of which contribute to increased fuel loads. These direct and indirect effects can cause widespread forest fires that reduce forest carbon stocks in the Amazon, with potentially important consequences for the global carbon cycle. These processes are expected to become more widespread, common, and intense as global climate changes, yet the mechanisms linking droughts, wildfires, and associated changes in carbon stocks remain poorly understood. Here, we expanded the capabilities of a dynamic forest carbon model to better represent (1) drought effects on carbon and fuel dynamics and (2) understory fire behavior and severity. We used the refined model to quantify changes in PanAmazon live carbon stocks as a function of the maximum climatological water deficit (MCWD) and fire intensity, under both historical and future climate conditions. We found that the 2005 and 2010 droughts increased potential fire intensity by 226 kW m(-1) and 494 kW m(-1), respectively. These increases were due primarily to increased understory dryness (109 kW m(-1) in 2005; 124 kW m(-1) in 2010) and altered forest structure (117 kW m(-1) in 2005; 370 kW m(-1) in 2010) effects. Combined, these historic droughts drove total simulated reductions in live carbon stocks of 0.016 (2005) and 0.027 (2010) PgC across the Amazon Basin. Projected increases in future fire intensity increased simulated carbon losses by up to 90% per unit area burned, compared with modern climate. Increased air temperature was the primary driver of changes in simulated future fire intensity, while reduced precipitation was secondary, particularly in the eastern portion of the Basin. Our results show that fire-drought interactions strongly affect live carbon stocks and that future climate change, combined with the synergistic effects of drought on forest flammability, may strongly influence the stability of tropical forests in the future. |
英文关键词 | Amazon climate change drought fire intensity fire severity CMIP5 fire modeling |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410170100001 |
WOS关键词 | PARTIAL THROUGHFALL EXCLUSION ; TREE MORTALITY ; CLIMATE-CHANGE ; DROUGHT ; SEVERITY ; SUSCEPTIBILITY ; DEFORESTATION ; FRAGMENTATION ; PRODUCTIVITY ; VARIABILITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/14934 |
专题 | 气候变化 |
作者单位 | 1.Univ Fed Vicosa, Ave PH Rolfs S-N, BR-36570000 Vicosa, MG, Brazil; 2.Fed Inst Technol North Minas Gerais IFNMG, Ave Humberto Mallard 1355, BR-39270000 Pirapora, MG, Brazil; 3.Woods Hole Res Ctr, 149 Woods Hole Rd, Falmouth, MA 02540 USA; 4.Inst Pesquisa Ambiental Amazonia IPAM, Brasilia, DF, Brazil; 5.Nichols Coll, Environm Sci, Dudley, MA 01571 USA; 6.Univ Fed Minas Gerais, Ave Antonio Carlos 6627, BR-31270901 Belo Horizonte, MG, Brazil |
推荐引用方式 GB/T 7714 | De Faria, Bruno L.,Brando, Paulo M.,Macedo, Marcia N.,et al. Current and future patterns of fire-induced forest degradation in Amazonia[J]. ENVIRONMENTAL RESEARCH LETTERS,2017,12(9). |
APA | De Faria, Bruno L.,Brando, Paulo M.,Macedo, Marcia N.,Panday, Prajjwal K.,Soares-Filho, Britaldo S.,&Coe, Michael T..(2017).Current and future patterns of fire-induced forest degradation in Amazonia.ENVIRONMENTAL RESEARCH LETTERS,12(9). |
MLA | De Faria, Bruno L.,et al."Current and future patterns of fire-induced forest degradation in Amazonia".ENVIRONMENTAL RESEARCH LETTERS 12.9(2017). |
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