A new method to determine soil organic carbon equilibrium
A new method to determine soil organic carbon equilibrium
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DOI：
10.1016/j.envsoft.2011.05.016
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发表时间：
2011-12-01
影响因子：
4.9
通讯作者：
Soussana, J. -F.
中科院分区：
文献类型：
--
作者：
Lardy, R.;Bellocchi, G.;Soussana, J. -F.
本研究针对土壤有机质（SOM）分解的五个碳库（结构、代谢、主动、缓慢和被动）的平衡条件，研究了PaSim模拟模型（PaSim）的动力学行为。提出了一种新的代数方法，基于一系列的矩阵和制定使用高斯-约旦（G-J）消除算法（稳定和有效的内存使用），并比较本地迭代程序使用土壤C数据从13个欧洲草原网站。与迭代法相比，代数法的优点是提高了C分配到土壤库的准确性和更快的收敛速度（6-20倍）。在SOM研究和建模的背景下讨论了它的价值。(C)2011爱思唯尔有限公司版权所有。
This work addresses the dynamical behaviour of the Pasture Simulation Model (PaSim), with respect to the equilibrium conditions for the five carbon (C) pools (structural, metabolic, active, slow, and passive) of soil organic matter (SOM) decomposition, which are modelled according to CENTURY. A novel algebraic approach, based on a sequence of matrices and formulated using the Gauss-Jordan (G-J) elimination algorithm (stable and efficient in memory usage), was proposed and compared to a native iterative procedure using soil C data from 13 European grassland sites. The advantage of the algebraic approach over the iterative method is an enhanced accuracy of C allocation to soil pools and a faster convergence (6-20 times). Its value was discussed in the context of SOM research and modelling. (C) 2011 Elsevier Ltd. All rights reserved.