SOMPROF: A vertically explicit soil organic matter model
SOMPROF: A vertically explicit soil organic matter model
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DOI：
10.1016/j.ecolmodel.2011.02.015
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发表时间：
2011-05-24
影响因子：
3.1
通讯作者：
Kabat, Pavel
中科院分区：
文献类型：
--
作者：
Braakhekke, Maarten C.;Beer, Christian;Kabat, Pavel
目前大多数土壤有机质模型都是将土壤作为一个整体来描述，而没有明确土壤有机质在土壤剖面中的垂直分布。然而，垂直SOM剖面可能是非常重要的土壤碳循环，无论是在短（小时至年）的时间尺度上，由于与土壤温度和水分剖面的相互作用，以及在长（年至世纪）的时间尺度上，因为深度特定的稳定机制的有机质。SUM模式中SUM剖面和地表有机层的代表性很可能可以改善对陆面通量对气候和环境变率的响应的预测。虽然存在能够模拟垂直SOM剖面的模型，但这些模型通常不是为大规模预测模拟而开发的，并且不能充分代表地表有机层。我们提出SOMPROF，垂直明确的SUM模型，设计用于实施到大尺度生态系统和陆面模型。该模型动态模拟的垂直SUM剖面和有机层股票的基础上的机械表示的生物扰动，有机物的液相运输，和垂直分布的根凋落物输入。我们测试了该模型的基础上，从一个老的增长落叶林（海尼希）在德国的数据，并进行了敏感性分析的传输参数，和垂直SUM分布的异养呼吸的时间变化的影响。模型结果与实测的有机碳剖面和储量进行了比较。SOMPROF能够模拟广泛的SUM配置文件，使用的参数值与以前的研究相比是现实的。敏感性分析结果表明，由于与土壤温度和水分剖面的相互作用，垂直SUM分布强烈影响异养呼吸的时间变化。(C)2011 Elsevier B.V.保留所有权利。
Most current soil organic matter (SOM) models represent the soil as a bulk without specification of the vertical distribution of SOM in the soil profile. However, the vertical SOM profile may be of great importance for soil carbon cycling, both on short (hours to years) time scale, due to interactions with the soil temperature and moisture profile, as well as on long (years to centuries) time scale because of depth-specific stabilization mechanisms of organic matter. It is likely that a representation of the SUM profile and surface organic layers in SUM models can improve predictions of the response of land surface fluxes to climate and environmental variability. Although models capable of simulating the vertical SOM profile exist, these were generally not developed for large scale predictive simulations and do not adequately represent surface organic horizons. We present SOMPROF, a vertically explicit SUM model, designed for implementation into large scale ecosystem and land surface models. The model dynamically simulates the vertical SUM profile and organic layer stocks based on mechanistic representations of bioturbation, liquid phase transport of organic matter, and vertical distribution of root litter input. We tested the model based on data from an old growth deciduous forest (Hainich) in Germany, and performed a sensitivity analysis of the transport parameters, and the effects of the vertical SUM distribution on temporal variation of heterotrophic respiration. Model results compare well with measured organic carbon profiles and stocks. SOMPROF is able to simulate a wide range of SUM profiles, using parameter values that are realistic compared to those found in previous studies. Results of the sensitivity analysis show that the vertical SUM distribution strongly affects temporal variation of heterotrophic respiration due to interactions with the soil temperature and moisture profile. (C) 2011 Elsevier B.V. All rights reserved.