Abstract
To understand the rates at which soils form from bedrock, it is important to know the rates at which the bedrock surface lowers (the apparent erosion rate, which is assumed to be constant). Previous models that calculate apparent erosion rates using measured concentrations of cosmogenic radionuclides rely on the assumption that the bulk density of the soil which forms as a product of bedrock erosion either equals that of the bedrock itself or is constant with depth down the soil profile. This assumption fails to recognise that soils have significantly lower densities that might not be constant with depth. The model presented here allows for the calculation of isotopically-derived soil production rates, considering the bulk density profile of the soil overlying the bedrock surface. This calculator, which can be run both in MATLAB® and GNU Octave©, represents a novel and significant contribution to the derivation of soil production rates.
Highlights
We present a set of MATLAB1 / GNU Octave© scripts and their mathematical description
Site data has to be inputted in individual comma separated files (.csv) for each site
The mathematical details of the calculations made in each script are described here: 2.1 start.m
Summary
We present a set of MATLAB1 / GNU Octave© scripts and their mathematical description. These are designed to calculate the surface erosion rates using one or more measured cosmogenic concentrations at or below the surface when the bulk density profile is known. An example of this model's application is described in [4]
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