Abstract We describe the implementation of the Vaganov–Shashkin tree-ring growth model (VSM) in MATLAB. VSM, originally written in Fortran, mimics subdaily and daily resolution processes of cambial growth as a function of soil moisture, air temperature, and insolation, with environmental forcing modeled as the principle of limiting factors. The re-implementation in a high level interpreted language, while sacrificing speed, provides opportunities to systematically evaluate model parameters, generate large ensembles of simulated tree-ring chronologies, and embed proxy system modeling within data assimilation approaches to climate reconstruction. We provide a versioned code repository and examples of model applications which permit process-level understanding of tree ring width variations in response to environmental variations and boundary conditions.

中文翻译：

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Vaganov-Shashkin 树环代理系统模型的解释型语言实现

摘要 我们描述了 Vaganov-Shashkin 树轮增长模型 (VSM) 在 MATLAB 中的实现。VSM 最初是用 Fortran 编写的，模拟了形成层生长的日常和日常分解过程，作为土壤湿度、气温和日照的函数，环境强迫建模为限制因素的原理。以高级解释语言重新实现，虽然牺牲了速度，但提供了系统评估模型参数、生成模拟树轮年表的大型集合以及将代理系统建模嵌入到气候重建的数据同化方法中的机会。