Landscape evolution modeling constrains the detectability of climate-driven erosion signals in cosmogenic nuclide records
Description
This dataset accompanies the paper published in JGR: Earth Surface that carries the same title ("Landscape evolution modeling constrains the detectability of climate-driven erosion signals in cosmogenic nuclide records"). It contains simulation outputs from the Lagrangian landscape evolution model Cidre, used to track ¹⁰Be, ²⁶Al, ¹⁴C, and ²¹Ne concentrations in individual quartz grains transported through synthetic catchments subjected to Milankovitch-scale precipitation forcing. The archive covers the full simulation suite reported in the paper: two uplift rates (10 and 100 mm ka⁻¹), four forcing periods (23, 41, 100, and 400 kyr), three catchment sizes (100, 625, and 2500 km²) alongside point-source simulations, sinusoidal and abrupt (stepwise) precipitation forcing, and runs with and without lateral channel erosion, plus steady-state reference simulations at each uplift rate. The data underlie all main-text figures (Figs. 2–8) and Supporting Information figures (S1–S3). Each simulation produced by the Cidre landscape evolution model outputs a tab-delimited time-series file named <gridsize>_<amplitude>_denud.txt. The file contains one line per 1 kyr window over 4 Myr of transient forcing (4001 rows, 19 columns), reporting basin-averaged model diagnostics and cosmogenic-nuclide (CN) output for individual quartz grains exported at the catchment outlet. Columns (in order): Time (yr); imposed denudation rate; mean elevation; mean slope; number of internally-drained lakes; number of hillslope collapses; mean regolith production rate; mean runoff; mean sediment thickness; apparent denudation rates derived from ¹⁰Be, ²⁶Al, ¹⁴C, and ²¹Ne concentrations in exported grains; number of grains exported during the window; mean rainfall; mean CN concentrations (¹⁰Be, ²⁶Al, ¹⁴C, ²¹Ne) in exported grains. Filename convention (all folders): <size>_<amplitude>_denud.txt, where <size> is grid side length in pixels (100 = 100 km², 250 = 625 km², 500 = 2500 km²; 10 = 3×3 pixel point-source simulation with no landscape) and <amplitude> is the peak-to-peak precipitation change relative to the long-term mean, in percent.