Simulation data of barrier-shrub interactions from the Barrier3D model

Barrier3D (version 1.0) simulation results of shrub expansion and barrier migration behavior and morphology across a range of input conditions. Simulations vary by the presence or absence of shrubs, the characteristic dune growth rate (0.3-0.9 yr-1), relative sea-level rise rate (3-15 mm/yr), the maximum flow reduction coefficient (0.05-0.35), and the width of initial barrier morphology. Each row in the spreadsheet represents a unique model simulation, and each simulation belongs to one of two different experiments: 1) Barrier_evolution, which is designed to assess the ways in which shrubs alter barrier morphology and the rate and style of barrier retreat by running simulations with and without shrubs across broad ranges of relative sea-level rise rates and dune growth rates; and 2) Shrub_expansion, which explores the ways in which barrier morphologic evolution influences the rate and pattern of shrub expansion. To account for storm stochasticity in the model, each unique combination of parameter values was simulated 100 times. Simulations run for 1,000 model years for the Barrier_evolution experiment, and 150 years for the Shrub_expansion experiment, or until the barrier drowns. The location of the initial cluster of shrub establishment is randomly determined in the Barrier_evolution experiment, but is constrained to the first 100 m (2%) alongshore in the Shrub_expansion experiment. Results from the two experiments are contained in two different files: barrier_island_evolution.csv and shrub_expansion.csv. A table of parameter values, definitions, and sources for the shrub module used in the experiments is given in the file: parameter_values_sources.csv