A Large and Persistent Carbon Sink in the World's Forests
A Large and Persistent Carbon Sink in the World's Forests
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DOI：
10.1126/science.1201609
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发表时间：
2011-08-19
期刊：
影响因子：
56.9
通讯作者：
Hayes, Daniel
中科院分区：
文献类型：
--
作者：
Pan, Yude;Birdsey, Richard A.;Hayes, Daniel
近几十年来，陆地碳汇一直很大，但其规模和位置仍不确定。利用森林资源清查数据和长期生态系统碳研究，我们估计1990年至2007年全球森林碳汇总量为2.4 +/- 0.4 petagram/年（Pg C year（-1））。我们还估计了热带土地利用变化的1.3 +/- 0.7 Pg C年（-1）的来源，包括热带森林砍伐的总排放量为2.9 +/- 0.5 Pg C年（-1），部分由热带森林再生的碳汇1.6 +/- 0.5 Pg C年（-1）补偿。总的来说，通量构成了1.1 +/- 0.8 Pg C年（-1）的全球森林净汇，热带估计具有最大的不确定性。我们的森林汇总量估计相当于从化石燃料排放和土地利用变化源减去海洋和大气汇推导出的陆地汇。
The terrestrial carbon sink has been large in recent decades, but its size and location remain uncertain. Using forest inventory data and long-term ecosystem carbon studies, we estimate a total forest sink of 2.4 +/- 0.4 petagrams of carbon per year (Pg C year(-1)) globally for 1990 to 2007. We also estimate a source of 1.3 +/- 0.7 Pg C year(-1) from tropical land-use change, consisting of a gross tropical deforestation emission of 2.9 +/- 0.5 Pg C year(-1) partially compensated by a carbon sink in tropical forest regrowth of 1.6 +/- 0.5 Pg C year(-1). Together, the fluxes comprise a net global forest sink of 1.1 +/- 0.8 Pg C year(-1), with tropical estimates having the largest uncertainties. Our total forest sink estimate is equivalent in magnitude to the terrestrial sink deduced from fossil fuel emissions and land-use change sources minus ocean and atmospheric sinks.