Gridded depth and accumulation products from dated airborne radar stratigraphy over West Antarctica during the mid-Holocene, v.1.0.0

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.

•  5x MATLAB files:
  • Calculate_accumulation_rates.m: calculates accumulation rates for the mid-Holocene-to-present, as well as uncertainties associated with the age and model structural uncertainty;
  • Calculate_D_parameter.m: calculates the D parameter (and associated L_path, L_H and L_b) to assess the feasability of the LLA over our grid;
  • Calculate_longitudinal_strain_rates.m: calculates the longitudinal strain rates over our grid from modern ice-flow velocities;
  • Calculate_vertical_strain_rates.m: calculates vertical strain rates for the mid-Holocene-to-present part of the ice column from accumulation estimates;
  • Resample_IRH_data.m: Re-samples the along-track IRH data into evenly distributed 500-m points for speeding up the gridding and calculations of accumulation rates;
     
• 10x GeoTIFF files:
  • Holocene_IRH_depth_Fig2a.tif: Figure 2a;
  • Holocene_accumulation_rates_Fig3a.tif: Figure 3a;
  • Difference_Holocene_accumulation_RACMO2_Fig3c.tif: Figure 3c;
  • Relative_difference_Holocene_accumulation_RACMO2_Fig4.tif: Figure 4;
  • D_parameter_FigS1d.tif: Figure S1d;
  • Holocene_vertical_strain_rates_FigS2a.tif: Figure S2a;
  • Longitudinal_strain_rates_FigS2b.tif: Figure S2b;
  • Holocene_accumulation_lower_uncertainty_FigS4a.tif: Figure S4a;
  • Holocene_accumulation_upper_uncertainty_FigS4b.tif: Figure S4b;
  • Holocene_accumulation_relative_uncertainty_FigS4c.tif: 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).