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Disentangling the contribution of multiple land covers to fire-mediated carbon emissions in Amazonia during the 2010 drought
Global Biogeochemical Cycles ( IF 5.4 ) Pub Date : 2015-10-01 , DOI: 10.1002/2014gb005008
Liana Oighenstein Anderson 1 , Luiz E O C Aragão 2 , Manuel Gloor 3 , Egídio Arai 4 , Marcos Adami 4 , Sassan S Saatchi 5 , Yadvinder Malhi 6 , Yosio E Shimabukuro 4 , Jos Barlow 7 , Erika Berenguer 7 , Valdete Duarte 4
Affiliation  

Abstract In less than 15 years, the Amazon region experienced three major droughts. Links between droughts and fires have been demonstrated for the 1997/1998, 2005, and 2010 droughts. In 2010, emissions of 510 ± 120 Tg C were associated to fire alone in Amazonia. Existing approaches have, however, not yet disentangled the proportional contribution of multiple land cover sources to this total. We develop a novel integration of multisensor and multitemporal satellite‐derived data on land cover, active fires, and burned area and an empirical model of fire‐induced biomass loss to quantify the extent of burned areas and resulting biomass loss for multiple land covers in Mato Grosso (MT) state, southern Amazonia—the 2010 drought most impacted region. We show that 10.77% (96,855 km2) of MT burned. We estimated a gross carbon emission of 56.21 ± 22.5 Tg C from direct combustion of biomass, with an additional 29.4 ± 10 Tg C committed to be emitted in the following years due to dead wood decay. It is estimated that old‐growth forest fires in the whole Brazilian Legal Amazon (BLA) have contributed to 14.81 Tg of C (11.75 Tg C to 17.87 Tg C) emissions to the atmosphere during the 2010 fire season, with an affected area of 27,555 km2. Total C loss from the 2010 fires in MT state and old‐growth forest fires in the BLA represent, respectively, 77% (47% to 107%) and 86% (68.2% to 103%) of Brazil's National Plan on Climate Change annual target for Amazonia C emission reductions from deforestation.

中文翻译:

解开 2010 年干旱期间多种土地覆盖对亚马逊地区火灾引起的碳排放的贡献

摘要 在不到15年的时间里,亚马逊地区经历了3次大旱。1997/1998、2005 和 2010 年的干旱已经证明了干旱与火灾之间的联系。2010 年,510 ± 120 Tg C 的排放量仅与亚马逊地区的火灾有关。然而,现有的方法尚未解开多个土地覆盖来源对这一总数的比例贡献。我们开发了一种新的多传感器和多时相卫星衍生数据的集成,包括土地覆盖、活跃火灾和燃烧面积以及火灾引起的生物量损失的经验模型,以量化马托多个土地覆盖的燃烧面积和由此产生的生物量损失亚马逊南部的格罗索 (MT) 州——2010 年干旱影响最严重的地区。我们表明 10.77%(96,855 平方公里)的 MT 被烧毁。我们估计总碳排放量为 56.21 ± 22。生物质直接燃烧产生的 5 Tg C,由于死木腐烂,承诺在接下来的几年中额外排放 29.4 ± 10 Tg C。据估计,在 2010 年火灾季节,整个巴西合法亚马逊 (BLA) 的古老森林火灾已导致向大气中排放 14.81 Tg C(11.75 Tg C 至 17.87 Tg C),受影响面积为 27,555平方公里。2010 年 MT 州火灾和 BLA 老林火灾造成的总碳损失分别占巴西国家气候变化计划的 77%(47% 至 107%)和 86%(68.2% 至 103%) Amazonia C 因森林砍伐而减少排放的目标。据估计,在 2010 年火灾季节,整个巴西合法亚马逊 (BLA) 的古老森林火灾已导致 14.81 Tg C (11.75 Tg C 至 17.87 Tg C) 排放到大气中,受影响面积为 27,555平方公里。2010 年 MT 州火灾和 BLA 老林火灾造成的总碳损失分别占巴西国家气候变化计划的 77%(47% 至 107%)和 86%(68.2% 至 103%) Amazonia C 因森林砍伐而减少排放的目标。据估计,在 2010 年火灾季节,整个巴西合法亚马逊 (BLA) 的古老森林火灾已导致 14.81 Tg C (11.75 Tg C 至 17.87 Tg C) 排放到大气中,受影响面积为 27,555平方公里。2010 年 MT 州火灾和 BLA 老林火灾造成的总碳损失分别占巴西国家气候变化计划的 77%(47% 至 107%)和 86%(68.2% 至 103%) Amazonia C 因森林砍伐而减少排放的目标。
更新日期:2015-10-01
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