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首页> 外文期刊>Agricultural and Forest Meteorology >The regional carbon budget of East Asia simulated with a terrestrial ecosystem model and validated using AsiaFlux data
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The regional carbon budget of East Asia simulated with a terrestrial ecosystem model and validated using AsiaFlux data

机译：利用陆地生态系统模型模拟并使用AsiaFlux数据进行验证的东亚区域碳预算

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The regional-scale carbon budget of East Asia was evaluated using a process-based model of terrestrial carbon cycle driven by high-resolution input data. The model was developed for integrating observational data and validated with net ecosystem CO exchange (NEE) data from AsiaFlux sites. For each 30-sx30-s (about 1kmpo) grid cell, the ecosystem model was used to simulate daily photosynthesis, respiration, decomposition, and ecosystem growth. Such high-resolution simulation allowed us to explicitly capture land surface heterogeneity and to ameliorate the scale-gap in comparison between simulated and observed fluxes. The simulated NEE was compared with data from three AsiaFlux sites (Tomakomai, Fujiyoshida, and Takayama) during the period 2000-2005, with results suggesting that the model retrieved the carbon budget characteristics, such as differences in seasonal sink/source variation among biome types. The regional simulation indicated that terrestrial ecosystems in East Asia had a net primary productivity of 996TgCyearp# and a net ecosystem productivity of 58TgCyearp# (1Tg=10p#po g), indicating a net carbon sink equivalent to 11% of regional anthropogenic emissions. Interannual variability in the carbon budget was evident: East Asian ecosystems absorbed more carbon in 2002, the warmest year with a longer growing period. Based on the regional result, the spatial representativeness of the AsiaFlux sites was investigated with regard to climatic condition and carbon budgets. This model provides a reliable means for scaling-up from site to regional scales, and the findings have implications for observational studies and ecosystem management related to carbon sequestration and climate change mitigation.
机译：使用高分辨率输入数据驱动的基于过程的陆地碳循环模型，评估了东亚的区域规模碳预算。该模型是为整合观测数据而开发的，并已通过AsiaFlux站点的净生态系统CO交换（NEE）数据进行了验证。对于每个30-sx30-s（约1 kmpo）的网格单元，使用生态系统模型来模拟每日的光合作用，呼吸作用，分解和生态系统生长。这样的高分辨率模拟使我们能够清楚地捕获地表非均质性，并在模拟通量和观测通量之间进行比较，从而改善尺度差距。在2000-2005年期间，将模拟的NEE与来自三个AsiaFlux站点（Tomakomai，Fujiyoshida和Takayama）的数据进行了比较，结果表明该模型检索了碳预算特征，例如生物群落类型之间季节性汇/源变化的差异。区域模拟表明，东亚陆地生态系统的净初级生产力为996TgCyearp＃，净生态系统生产力为58TgCyearp＃（1Tg = 10p＃po g），表明净碳汇相当于区域人为排放量的11％。碳预算的年际变化是显而易见的：2002年是东亚生态系统吸收更多碳的一年，这是最温暖的一年，具有较长的生长期。根据区域结果，就气候条件和碳预算研究了AsiaFlux站点的空间代表性。该模型为从站点规模到区域规模的扩大提供了可靠的手段，研究结果对于与碳封存和减缓气候变化有关的观测研究和生态系统管理具有重要意义。

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