The CAIRN method: automated, reproducible calculation of catchment-averaged denudation rates from cosmogenic nuclide concentrations
The CAIRN method: automated, reproducible calculation of catchment-averaged denudation rates from cosmogenic nuclide concentrations
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DOI：
10.5194/esurf-4-655-2016
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发表时间：
2016-08
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影响因子：
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通讯作者：
S. Mudd;M. Harel;M. Hurst;S. Grieve;S. Marrero
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文献类型：
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作者：
S. Mudd;M. Harel;M. Hurst;S. Grieve;S. Marrero
摘要。我们报道了一个根据宇宙成因核素浓度计算流域平均剥蚀速率的新程序。该方法（根据宇宙成因核素计算流域平均剥蚀速率：CAIRN）整合了先前报道的产量换算和地形遮蔽算法。此外，它逐个像素地计算产量和遮蔽。我们探讨了地形遮蔽在方位角（Δθ）和海拔角（Δϕ）上的采样频率的影响，并表明在地形起伏大的区域需要相对较高的采样频率，在Δθ = 8°和Δϕ = 5°时可在精度和计算成本之间取得良好平衡。CAIRN包括内部和外部不确定性分析，并打包在免费可用的软件中，以便于轻松重现剥蚀速率估算。CAIRN不仅计算剥蚀速率，还自动对遮蔽和产量进行流域平均，因此可用于为CRONUS系列在线计算器提供可重现的输入参数。
Abstract. We report a new program for calculating catchment-averaged denudation rates from cosmogenic nuclide concentrations. The method (Catchment-Averaged denudatIon Rates from cosmogenic Nuclides: CAIRN) bundles previously reported production scaling and topographic shielding algorithms. In addition, it calculates production and shielding on a pixel-by-pixel basis. We explore the effect of sampling frequency across both azimuth (Δθ) and altitude (Δϕ) angles for topographic shielding and show that in high relief terrain a relatively high sampling frequency is required, with a good balance achieved between accuracy and computational expense at Δθ = 8° and Δϕ = 5°. CAIRN includes both internal and external uncertainty analysis, and is packaged in freely available software in order to facilitate easily reproducible denudation rate estimates. CAIRN calculates denudation rates but also automates catchment averaging of shielding and production, and thus can be used to provide reproducible input parameters for the CRONUS family of online calculators.