DOI: 10.5281/zenodo.7738654
title: Gridded depth and accumulation products from dated airborne radar stratigraphy over West Antarctica during the mid-Holocene, v.1.0.0

description: This dataset comprises of codes (written in MATLAB) and gridded files (exported as GeoTIFF) presented in Bodart et al. (2023; The Crysophere; https://doi.org/10.5194/tc-2022-199). A summary of the key findings from this study is provided as follows: "Using a spatially extensive IRH over Pine Island Glacier, Thwaites Glacier, and Institute and Möller Ice Streams (covering a total of 610 000 km2 or 30% of the WAIS), and a local layer approximation model, we infer mid-Holocene accumulation rates over the slow-flowing parts of these catchments for the past ~4700 years. By comparing our results with modern climate reanalysis models (1979 – 2019) and observational syntheses (1651 – 2010), we estimate that accumulation rates over the Amundsen-Weddell-Ross divide were on average 18% higher during the mid-Holocene than modern rates. However, no significant spatial changes in the accumulation pattern were observed." This dataset contains a series of files (5x .m files, 10x .tif files). The numbering of the figures in the description below refers to the order of the figures in the associated paper. <strong> 5x MATLAB files:</strong> <strong>Calculate_accumulation_rates.m</strong>: calculates accumulation rates for the mid-Holocene-to-present, as well as uncertainties associated with the age and model structural uncertainty; <strong>Calculate_D_parameter.m</strong>: calculates the D parameter (and associated L_path, L_H and L_b) to assess the feasability of the LLA over our grid; <strong>Calculate_longitudinal_strain_rates.m</strong>: calculates the longitudinal strain rates over our grid from modern ice-flow velocities; <strong>Calculate_vertical_strain_rates.m</strong>: calculates vertical strain rates for the mid-Holocene-to-present part of the ice column from accumulation estimates; <strong>Resample_IRH_data.m</strong>: Re-samples the along-track IRH data into evenly distributed 500-m points for speeding up the gridding and calculations of accumulation rates;<br> <strong>10x GeoTIFF files:</strong> <strong>Holocene_IRH_depth_Fig2a.tif: </strong>Figure 2a; <strong>Holocene_accumulation_rates_Fig3a.tif:</strong> Figure 3a; <strong>Difference_Holocene_accumulation_RACMO2_Fig3c.tif:</strong> Figure 3c; <strong>Relative_difference_Holocene_accumulation_RACMO2_Fig4.tif:</strong> Figure 4; <strong>D_parameter_FigS1d.tif:</strong> Figure S1d; <strong>Holocene_vertical_strain_rates_FigS2a.tif: </strong>Figure S2a; <strong>Longitudinal_strain_rates_FigS2b.tif:</strong> Figure S2b; <strong>Holocene_accumulation_lower_uncertainty_FigS4a.tif:</strong> Figure S4a; <strong>Holocene_accumulation_upper_uncertainty_FigS4b.tif:</strong> Figure S4b; <strong>Holocene_accumulation_relative_uncertainty_FigS4c.tif: </strong>Figure S4c; Please also cite the associated paper when using this dataset. Any questions, please direct them to the corresponding author, Julien Bodart (julien.bodart@ed.ac.uk).
description: {"references": ["Bodart, J.A., Bingham, R.G., Young, D.A., MacGregor, J.A., Ashmore, D.W., Quartini, E., Hein, A.S., Vaughan, D.G. and Blankenship, D.D., 2022. High mid-Holocene accumulation rates over West Antarctica inferred from a pervasive ice-penetrating radar reflector. The Cryosphere"]}