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Parameter Localization of Greenhouse Gas Value Model and Greenhouse Gas Storage Simulation for Forest Ecosystems in China

机译：中国森林生态系统温室气体价值模型和温室气体储气仿真的参数定位

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Quantifying the greenhouse gas (GHG) storage in forest ecosystems can support global change directly, from a biogeochemical perspective. However, accurately assessing the amount of GHG storage in forest ecosystems still faces challenges in China because of their wide distribution, varying types, and the changing definitions and areas of forests. We used land-use data with 5-year intervals during 1990–2015 to investigate the spatiotemporal variations of forest ecosystems in China. As three major greenhouse gases in forest ecosystems, the potential storage of carbon dioxide, methane, and nitrous oxide can be calculated by a greenhouse gas value (GHGV) model. The results showed that the total area of forest ecosystems decreased by 15 × 10 5 ha during the study period. The area of forest ecosystems reached its highest level in 1995 and then declined. For various forest ecosystem types, shrubbery (Sh) increased by 0.82% but the broad-leaved forest, evergreen coniferous forest (ECF), and mixed forest (MF) all showed a downward trend. Correspondingly, the potential GHG storage of forest ecosystems declined from 156.97 Pg CO 2 -equivalent (CO 2 -eq) to 155.56 Pg CO 2 -eq, a decrease of 1.41 Pg CO 2 -eq. Compared with previous research results, the GHGV model proved to be an important supplementary method for estimating the potential storage of GHGs in forest ecosystems, especially in highly fragmented landscapes at a large scale. Our study indicated that the impact of forest ecosystems changes on potential GHG storage was serious during the study period. Our findings highlight that the GHGV model can be an effective and low-cost strategy to simulate the forest change and corresponding GHG storage. And considering the efficiency of the model and the historical analysis results of many periods, some of the results can also be used to inform the future afforestation programs and assess the expected GHG storage in China.
机译：从生物地球化学的角度来看，量化森林生态系统中的温室气体（GHG）储存可以直接支持全球变化。然而，由于其广泛的分布，不同类型以及森林的改变定义和地区，准确评估森林生态系统中的温室气体储存量仍然面临着中国的挑战。我们在1990 - 2015年期间使用了5年间隔的土地利用数据，以研究中国森林生态系统的时空变化。作为森林生态系统的三个主要温室气体，可以通过温室气体值（GHGV）模型来计算二氧化碳，甲烷和氧化亚乙烷的潜在储存。结果表明，在研究期间，森林生态系统的总面积减少了15×10 5公顷。森林生态系统地区于1995年达到了最高水平，然后拒绝。对于各种森林生态系统类型，灌木（SH）增加了0.82％，但阔叶森林，常绿针叶林（ECF）和混合森林（MF）都表现出下降趋势。相应地，森林生态系统的潜在温室气体储存从156.97pg co 2 - 等效（Co 2 -eq）至155.56pg Co 2 -eq，降低1.41pg CO 2 -eq。与先前的研究结果相比，GHGV模型被证明是估算森林生态系统中温室气体潜在储存的重要补充方法，特别是在大规模的高度碎片化的景观中。我们的研究表明，在研究期间，森林生态系统对潜在的温室气体储存的影响发生了影响。我们的研究结果强调，GHGV模型可以是一种有效和低成本的策略来模拟森林变化和相应的温室气体存储。并考虑到模型的效率和许多时期的历史分析结果，其中一些结果也可用于通知未来的造林计划，并评估中国的预期温室气体储存。

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