Estimating the multi-decadal carbon deficit of burned Amazonian forests
Estimating the multi-decadal carbon deficit of burned Amazonian forests
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估计被烧毁的亚马逊森林的数十年碳赤字
DOI：
10.1088/1748-9326/abb62c
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发表时间：
2020
影响因子：
6.7
通讯作者：
Withey, Kieran
中科院分区：
文献类型：
--
作者：
Silva, Camila V;Aragão, Luiz E;Young, Paul J;Espirito-Santo, Fernando;Berenguer, Erika;Anderson, Liana O;Brasil, Izaias;Pontes-Lopes, Aline;Ferreira, Joice;Withey, Kieran
近年来，潮湿热带森林中的野火变得越来越常见，增加了未与火灾共同进化的森林中树木的死亡率。估计这些野火的碳排放量是复杂的。目前的方法依赖于基于时间和空间的静态排放系数对承诺排放量的估计，但这些排放量无法分配给具体年份，因此无法与其他时间明确的排放源进行比较。此外，承诺排放量是总估计数，而野火的长期后果需要了解火灾后二氧化碳吸收的净排放量。在这里，使用30年的野火时序从整个巴西亚马逊，我们计算亚马逊野火的净二氧化碳排放量，通过开发统计模型比较火灾后的变化，茎死亡率，necromass分解和植被生长与未燃烧的森林地块在同一时间采样。在30年的时间里，火灾燃烧和随后的树木死亡和分解产生的总排放量相当于126.1 Mg CO 2 ha− 1，其中73%（92.4 Mg CO 2 ha− 1）来自死亡和分解。这些排放量仅部分被森林增长所抵消，估计同期的二氧化碳吸收量为45.0 Mg ha− 1。我们的分析使我们能够分配多年的排放量和增长，揭示了森林火灾后4年的净年排放量峰值。目前，巴西的国家排放确定贡献（NDC）没有将森林火灾视为一个重要来源，尽管这些火灾可能对亚马逊河流域的净碳平衡产生重大和长期的影响。考虑火灾后的长期坏死物质分解和植被再生对于改进全球碳预算估计和热带森林国家的国家温室气体清单至关重要。
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 CO 2. Here, using a 30 year wildfire chronosequence from across the Brazilian Amazon, we calculate net CO 2 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 CO 2 ha− 1 of which 73%(92.4 Mg CO 2 ha− 1) resulted from mortality and decomposition. These emissions were only partially offset by forest growth, with an estimated CO 2 uptake of 45.0 Mg ha− 1 over 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.
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2010 年和 2015/2016 年亚马逊干旱的火灾应对措施
影响因子：
2.9
作者：
Celso H. L. Silva Junior;L. Anderson;A. L. Silva;C. T. Almeida;Ricardo Dalagnol;M. A. J. S. Pletsch;Thales V Penha;Rennan A. Paloschi;L. Aragão
通讯作者：
L. Aragão
影响因子：
16.6
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
通讯作者：
Saatchi S
影响因子：
5.5
作者：
M. V. van Nieuwstadt;D. Sheil
通讯作者：
M. V. van Nieuwstadt;D. Sheil
影响因子：
3.7
作者：
Gora, Evan M.;Kneale, Riley C.;Muller-Landau, Helene C.
通讯作者：
Muller-Landau, Helene C.
亚马逊南部林下火灾频率和被烧毁森林的命运
DOI：
--
发表时间：
2013
期刊：
Philosophical Transactions of the Royal Society B: Biological Sciences
影响因子：
--
作者：
D. Morton;Y. Page;R. DeFries;G. Collatz;G. Hurtt;G. Hurtt
通讯作者：
G. Hurtt