Gridded depth and accumulation products from dated airborne radar stratigraphy over West Antarctica during the mid-Holocene, v.1.0.0
Creators
- 1. School of GeoSciences, University of Edinburgh
- 2. Institute for Geophysics, University of Texas at Austin,
- 3. Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center
- 4. School of Environmental Sciences, University of Liverpool
- 5. Department of Astronomy, Cornell University
- 6. British Antarctic Survey
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.
- 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).
Files
D_parameter_FigS1d.tif
Files
(60.6 MB)
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Additional details
Related works
- Is published in
- Journal article: 10.5194/tc-2022-199 (DOI)
Funding
- E3 - Edinburgh Earth and Environment - Doctoral Training Partnership NE/L002558/1
- UK Research and Innovation
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