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首页> 外文期刊>Ecological research >The role of carbon flux and biometric observations in constraining a terrestrial ecosystem model: a case study in disturbed forests in East Asia
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The role of carbon flux and biometric observations in constraining a terrestrial ecosystem model: a case study in disturbed forests in East Asia

机译：碳通量和生物特征观测在约束陆地生态系统模型中的作用：以东亚受干扰森林为例

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摘要

The process of confining unnecessary freedom is a step toward advanced ecosystem modeling. This study demonstrates the importance of carbon flux and biometric observation in constraining a terrestrial ecosystem model with a simple optimization scheme. At the selected sites from AsiaFlux network, a simultaneous optimization scheme for both carbon flux and biomass was compared with carbon flux-oriented and biomass-oriented optimization schemes using the Biome-BGC model. The optimization scheme oriented to either carbon flux or biomass provided simulation results that were consistent with observations, but with reduced performance in unconstrained variables. The simultaneous optimization scheme yielded results that were consistent with observations for both carbon flux and biomass. By comparing long-term projections simulated by three schemes, it was found that the optimization oriented only to carbon flux has limited performance because misrepresented biomass significantly affected a projection of carbon exchange through heterotrophic respiration. From these experiments, we found that (1) a process model like Biome-BGC is capable of reproducing both carbon flux and biomass within acceptable proximity, (2) constraining biomass is importance not just because it is one of carbon cycle components, but also it significantly affects simulations of carbon flux. Thus, it is important to invest more effort to improve simulation of biomass as well as carbon flux.
机译：限制不必要的自由的过程是迈向高级生态系统建模的一步。这项研究证明了碳通量和生物特征观测在通过简单的优化方案约束陆地生态系统模型中的重要性。在AsiaFlux网络的选定站点上，使用Biome-BGC模型将针对碳通量和生物量的同时优化方案与针对碳通量和针对生物量的优化方案进行了比较。针对碳通量或生物量的优化方案提供的模拟结果与观察结果一致，但在无约束变量中的性能降低。同时优化方案产生的结果与碳通量和生物量的观察结果一致。通过比较三种方案模拟的长期预测，发现仅针对碳通量的优化性能有限，这是因为错误表示的生物量显着影响了异养呼吸对碳交换的预测。从这些实验中，我们发现（1）像Biome-BGC这样的过程模型能够在可接受的邻近范围内重现碳通量和生物量，（2）限制生物质的重要性不仅在于它是碳循环成分之一，而且还包括它极大地影响了碳通量的模拟。因此，重要的是投入更多的精力来改善对生物质以及碳通量的模拟。

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  • 来源
    《Ecological research》 |2013年第5期|893-905|共13页
  • 作者

    Masayuki Kondo; Kazuhito Ichii; Masahito Ueyama; Yasuko Mizoguchi; Rvuichi Hirata; Nobuko Saigusa;

  • 作者单位

    Faculty of Symbiotic Systems Science, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan;

    Faculty of Symbiotic Systems Science, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan;

    Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Tanan;

    Hokkaido Research Center, Forestry and Forest Products Research Institute, 7 Hitsujigaoka, Toyohira, Sapporo 062-8516, Japan;

    National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba 305-8506, Japan;

    National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba 305-8506, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biomass; Eddy covariance; Carbon cycle; Disturbance; Terrestrial ecosystem model; Optimization;

    机译：生物质涡度协方差碳循环;骚乱;陆地生态系统模型;优化;

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