Inventory-based estimates of forest biomass carbon stocks in China: A comparison of three methods
Inventory-based estimates of forest biomass carbon stocks in China: A comparison of three methods
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DOI：
10.1016/j.foreco.2009.09.047
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发表时间：
2010-03-20
影响因子：
3.7
通讯作者：
Birdsey, Richard
中科院分区：
文献类型：
--
作者：
Guo, Zhaodi;Fang, Jingyun;Birdsey, Richard
多项研究报告了对中国森林生物量碳（C）储量的不同估计。这些估计数之间的差异可能主要归因于所使用的方法。利用平均生物量密度法（MBM）、平均比值法（MRM）和连续生物量扩展因子法（BEF）对1984~2003年中国森林生物量碳储量及其变化进行了估算。这三种方法对生物量碳储量产生了不同的估计：最低的（4.0 - 5.9 Pg C）来自煤层气，最高的（5.7 - 7.7 Pg C）来自MBM，中间估计值（4.2 - 6.2 Pg C）来自MRM。林龄级是造成这些方法引起的差异的主要因素。MBM高估了生物量为10岁的森林，但低估了生物量为老龄林，而相反的是真实的MRM。此外，这三种方法导致不同类型的森林生物量碳储量的不同估计。对于温带/亚热带混交林，MBM产生的估计值比CBM高92%，MRM产生的估计值比CBM低14%。高估的程度与各森林类型中中幼龄林所占的比例密切相关。(C)2009爱思唯尔有限公司版权所有。
Several studies have reported different estimates for forest biomass carbon (C) stocks in China. The discrepancy among these estimates may be largely attributed to the methods used. In this study, we used three methods [mean biomass density method (MBM), mean ratio method (MRM), and continuous biomass expansion factor (BEF) method (abbreviated as CBM)] applied to forest inventory data to estimate China's forest biomass C stocks and their changes from 1984 to 2003. The three methods generated various estimates of the biomass C stocks: the lowest (4.0-5.9 Pg C) from CBM and the highest (5.7-7.7 Pg C) from MBM, with an intermediate estimate (4.2-6.2 Pg C) from MRM. Forest age class is a major factor responsible for these method-induced differences. MBM overestimates biomass for young-aged forests, but underestimates biomass for old-aged forests; while the reverse is true for MRM. Further, the three methods resulted in different estimates of biomass C stocks for different forest types. For temperate/subtropical mixed forests, MBM generated a 92% higher estimate than CBM and MRM generated a 14% lower than CBM. The degree of the overestimates is closely related with the proportion of young-aged forest within total area of each forest type. (C) 2009 Elsevier B.V. All rights reserved.