Carbon stock in Japanese forests has been greatly underestimated
Carbon stock in Japanese forests has been greatly underestimated
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DOI：
10.1038/s41598-020-64851-2
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发表时间：
2020-05-12
影响因子：
4.6
通讯作者：
Shiraishi, Norihiko
中科院分区：
文献类型：
--
作者：
Egusa, Tomohiro;Kumagai, Tomo'omi;Shiraishi, Norihiko
准确估算森林碳储量和碳吸收总量对于预测全球变暖情景和规划CO2减排至关重要。森林资源清查是目前最准确的森林碳储量估算方法。日本国家森林资源清查（NFI）根据（1）直接实地测量（m-NFI）和（2）利用收获表（p-NFI）进行预测，提供整个森林面积的林分尺度树干蓄积量。在这里，我们表明，日本国家和地方林业机构和一些研究使用p-NFI，大大低估了日本森林碳储量（58-64%）和净年碳吸收量（41-48%）。这是因为大约10%的森林面积没有计入p-NFI，而且p-NFI中的产量表是在1970年左右编制的，已经过时。为了准确估计森林碳储量，应重建p-NFI中使用的产量表，或理想地继续进行m-NFI的实地测量活动。今后，为了有效利用日本森林的高CO2吸收能力，需要制定适当的森林经营计划，并从成本效益的角度与其他产业的CO2减排计划进行比较。
An accurate estimate of total forest carbon (C) stock and C uptake is crucial for predicting global warming scenarios and planning CO2 emission reductions. Forest inventory, based on field measurements of individual tree sizes, is considered the most accurate estimation method for forest C stock. Japan's national forest inventory (NFI) provides stand-scale stem volume for the entire forested area based on (1) direct field measurements (m-NFI) and (2) prediction using yield tables (p-NFI). Here, we show that Japanese national and local forestry agencies and some research studies have used p-NFI and greatly underestimated the Japanese forest C stock (58-64%) and net annual C uptake (41-48%). This was because approximately 10% of the forest area was not counted in p-NFI and because the yield tables in p-NFI, which were constructed around 1970, were outdated. For accurate estimation of the forest C stock, yield tables used in p-NFI should be reconstructed or ideally field measurement campaigns for m-NFI should be continued. In the future, appropriate forest management plans are necessary to effectively use the high CO2 absorption capacity of Japanese forests and these should be compared with other industries' CO2 reduction plans from a cost-benefit perspective.