High-resolution forest carbon stocks and emissions in the Amazon
High-resolution forest carbon stocks and emissions in the Amazon
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DOI：
10.1073/pnas.1004875107
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发表时间：
2010-09-21
影响因子：
11.1
通讯作者：
Hughes, R. Flint
中科院分区：
文献类型：
--
作者：
Asner, Gregory P.;Powell, George V. N.;Hughes, R. Flint
通过减少毁林和森林退化所致排放量（REDD）缓解气候变化的努力取决于对大片地理区域的热带森林碳储存和排放量进行测绘和监测。通过新的卫星成像、机载光探测和测距以及实地绘图的综合使用，我们以0.1公顷的分辨率绘制了秘鲁亚马逊地区430万公顷的地上碳储量和排放量，这一面积是哥斯达黎加所有森林面积的两倍，以揭示森林碳密度的决定因素，并证明为REDD绘制碳排放量的可行性。我们发现了以前未知的变化，碳储量在多个尺度的基础上地质基质和森林类型。从1999年到2009年，来自土地利用的排放量占整个地区碳排放总量的1.1%。森林退化，例如选择性砍伐，使区域碳排放量仅比森林砍伐增加47%，二次再生提供了18%的总排放量抵消。高分辨率监测降低了REDD计划碳排放的不确定性，同时揭示了对森林碳储存的基本环境控制及其与土地利用变化的相互作用。
Efforts to mitigate climate change through the Reduced Emissions from Deforestation and Degradation (REDD) depend on mapping and monitoring of tropical forest carbon stocks and emissions over large geographic areas. With a new integrated use of satellite imaging, airborne light detection and ranging, and field plots, we mapped aboveground carbon stocks and emissions at 0.1-ha resolution over 4.3 million ha of the Peruvian Amazon, an area twice that of all forests in Costa Rica, to reveal the determinants of forest carbon density and to demonstrate the feasibility of mapping carbon emissions for REDD. We discovered previously unknown variation in carbon storage at multiple scales based on geologic substrate and forest type. From 1999 to 2009, emissions from land use totaled 1.1% of the standing carbon throughout the region. Forest degradation, such as from selective logging, increased regional carbon emissions by 47% over deforestation alone, and secondary regrowth provided an 18% offset against total gross emissions. Very high-resolution monitoring reduces uncertainty in carbon emissions for REDD programs while uncovering fundamental environmental controls on forest carbon storage and their interactions with land-use change.