Estimated carbon dioxide emissions from tropical deforestation improved by carbon-density maps
Estimated carbon dioxide emissions from tropical deforestation improved by carbon-density maps
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DOI：
10.1038/nclimate1354
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发表时间：
2012-03-01
影响因子：
30.7
通讯作者：
Houghton, R. A.
中科院分区：
文献类型：
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作者：
Baccini, A.;Goetz, S. J.;Houghton, R. A.
森林砍伐占全球人为二氧化碳排放量的6-17%（1）。由于森林碳密度和区域毁林率的数据不足，排放量估计数存在很大的不确定性。因此，迫切需要改进数据集，以说明地上生物量的全球分布，特别是热带地区的分布。在这里，我们使用多传感器卫星数据，以前所未有的准确性和空间分辨率来估计泛热带生态系统的地上活木本植被碳密度。结果表明，热带木本植被中的碳总量为228.7 Pg C，比2010年全球森林资源评估报告的数量高出21%（参考文献3）。在国家一级，巴西和印度尼西亚的热带森林中储存的碳占总碳的35%，并产生最大的森林损失排放。结合地上碳储量的估计和区域森林砍伐率（4），我们估计2000-2010年期间热带森林砍伐和土地利用的碳总净排放量为1.0 Pg C yr（-1）-基于碳簿记模型。这些新的地上碳储存数据集将使热带国家能够更准确地满足其排放报告要求（即《联合国气候变化框架公约》第三级）。
Deforestation contributes 6-17% of global anthropogenic CO2 emissions to the atmosphere(1). Large uncertainties in emission estimates arise from inadequate data on the carbon density of forests' and the regional rates of deforestation. Consequently there is an urgent need for improved data sets that characterize the global distribution of aboveground biomass, especially in the tropics. Here we use multi-sensor satellite data to estimate aboveground live woody vegetation carbon density for pan-tropical ecosystems with unprecedented accuracy and spatial resolution. Results indicate that the total amount of carbon held in tropical woody vegetation is 228.7 Pg C, which is 21% higher than the amount reported in the Global Forest Resources Assessment 2010 (ref. 3). At the national level, Brazil and Indonesia contain 35% of the total carbon stored in tropical forests and produce the largest emissions from forest loss. Combining estimates of aboveground carbon stocks with regional deforestation rates(4) we estimate the total net emission of carbon from tropical deforestation and land use to be 1.0 Pg C yr(-1) over the period 2000-2010-based on the carbon bookkeeping model. These new data sets of aboveground carbon stocks will enable tropical nations to meet their emissions reporting requirements (that is, United Nations Framework Convention on Climate Change Tier 3) with greater accuracy.