21st Century drought-related fires counteract the decline of Amazon deforestation carbon emissions.
21st Century drought-related fires counteract the decline of Amazon deforestation carbon emissions.
复制标题
DOI：
10.1038/s41467-017-02771-y
复制
发表时间：
2018-02-13
影响因子：
16.6
通讯作者：
Saatchi S
中科院分区：
文献类型：
--
作者：
Aragão LEOC;Anderson LO;Fonseca MG;Rosan TM;Vedovato LB;Wagner FH;Silva CVJ;Silva Junior CHL;Arai E;Aguiar AP;Barlow J;Berenguer E;Deeter MN;Domingues LG;Gatti L;Gloor M;Malhi Y;Marengo JA;Miller JB;Phillips OL;Saatchi S
热带碳排放很大程度上来自直接的森林砍伐过程。然而，干旱引起的森林火灾的排放通常不包括在国家级碳排放清单中。在这里，我们研究了2003-2015年间巴西亚马逊干旱对火灾发生率和相关森林火灾碳排放的影响。我们发现，尽管森林砍伐率在过去13年里下降了76%，但与前12年相比，2015年干旱期间的火灾发生率增加了36%。2015年旱灾的活跃火数与砍伐森林的比率是有史以来最大的，活跃火灾发生的面积为799,293 平方公里。仅森林火灾的总排放量(989 ± 504tgCO2年−1)就是干旱年份老树林砍伐的一半以上。我们的结论是，用于核算和制定政策的碳排放清单需要考虑到与毁林进程无关的大量森林火灾排放。来自巴西亚马逊的森林砍伐碳排放急剧下降，但干旱导致的森林火灾排放在这一过程中增加了多少仍不清楚。在这里，作者表明，在干旱年份，森林火灾造成的总排放量是砍伐森林造成的排放量的一半以上。
Tropical carbon emissions are largely derived from direct forest clearing processes. Yet, emissions from drought-induced forest fires are, usually, not included in national-level carbon emission inventories. Here we examine Brazilian Amazon drought impacts on fire incidence and associated forest fire carbon emissions over the period 2003–2015. We show that despite a 76% decline in deforestation rates over the past 13 years, fire incidence increased by 36% during the 2015 drought compared to the preceding 12 years. The 2015 drought had the largest ever ratio of active fire counts to deforestation, with active fires occurring over an area of 799,293 km2. Gross emissions from forest fires (989 ± 504 Tg CO2 year−1) alone are more than half as great as those from old-growth forest deforestation during drought years. We conclude that carbon emission inventories intended for accounting and developing policies need to take account of substantial forest fire emissions not associated to the deforestation process. Deforestation carbon emissions from the Brazilian Amazon have declined steeply, but how much drought-induced forest fire emissions add to this process is still unclear. Here the authors show that gross emissions from forest fires are more than half as great as those from deforestation during drought years.
登录
查看更多内容
影响因子：
3.8
作者：
Deeter, M. N.;Martinez-Alonso, S.;Correia, C. S. C.
通讯作者：
Correia, C. S. C.
影响因子：
5.2
作者：
Anderson LO;Aragão LE;Gloor M;Arai E;Adami M;Saatchi SS;Malhi Y;Shimabukuro YE;Barlow J;Berenguer E;Duarte V
通讯作者：
Duarte V
影响因子：
3.8
作者：
Huffman, George J.;Adler, Robert F.;Wolff, David B.
通讯作者：
Wolff, David B.
影响因子：
64.8
作者：
Cox, Peter M.;Harris, Phil P.;Nobre, Carlos A.
通讯作者：
Nobre, Carlos A.
DOI：
10.1098/rstb.2003.1422
发表时间：
2004-03-29
影响因子：
6.3
作者：
Baker, TR;Phillips, OL;Martínez, RV
通讯作者：
Martínez, RV