Lepp, Allison; Simkins, Lauren M; Anderson, John B; O'Regan, Matt; Winsborrow, Monica; Smith, James A; Hillenbrand, Claus-Dieter; Wellner, Julia S; Prothro, Lindsay O; Podolskiy, Evgeny (2023): MATLAB script for grain images and grain-shape metrics of glacial sediments from Antarctica, Northwest Greenland, and the central Barents Sea [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.961704
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Abstract:
This project explores grain-scale signatures of subglacial sediment transport and subglacial hydrologic processes using grain shape and microtexture. We compare grain-shape distributions for grains from meltwater plume deposits to those of subglacial till and ice-proximal diamicton from the same glacial setting. The study incorporates samples from marine sediment cores collected offshore of Ryder Glacier in northwest Greenland, in the central Barents Sea, and Antarctic samples from Marguerite Bay, offshore Thwaites and Pine Island glaciers, and in the western Ross Sea. This dataset contains a MATLAB script used to process grain images and calculate individual grain-shape metrics (including circularity, solidity, and eccentricity), and an Excel spreadsheet containing the grain-shape measurements. Grain images were collected in 2022-23 using a Bettersizer S3 Plus particle size and shape analyzer at the University of Virginia.
Keyword(s):
Supplement to:
Lepp, Allison; Simkins, Lauren M; Anderson, John B; O'Regan, Matt; Winsborrow, Monica; Smith, James A; Hillenbrand, Claus-Dieter; Wellner, Julia S; Prothro, Lindsay O; Podolskiy, Evgeny (in review): Insights into glacial processes from micromorphology of silt-sized sediment. The Cryosphere, https://doi.org/10.5194/tc-2023-70
Additional metadata:
Esteves, Mariana; Rüther, Denise C; Winsborrow, Monica; Livingstone, Stephen J; Shackleton, Calvin; Andreassen, Karin; Hong, Wei-Li; Knies, Jochen (in review): An interconnected palaeo-subglacial lake system in the central Barents Sea. https://doi.org/10.31223/X58934
Halberstadt, Anna Ruth W; Simkins, Lauren M; Greenwood, Sarah L; Anderson, John B (2016): Past ice-sheet behaviour: retreat scenarios and changing controls in the Ross Sea, Antarctica. The Cryosphere, 10(3), 1003-1020, https://doi.org/10.5194/tc-10-1003-2016
Jennings, Anne E; Reilly, Brendan T; Andrews, John T; Hogan, Kelly A; Walczak, Maureen H; Jakobsson, Martin; Stoner, Joseph S; Mix, Alan C; Nicholls, Keith W; O'Regan, Matt; Prins, Maarten Arnoud; Troelstra, Simon (2022): Modern and early Holocene ice shelf sediment facies from Petermann Fjord and northern Nares Strait, northwest Greenland. Quaternary Science Reviews, 283, 107460, https://doi.org/10.1016/j.quascirev.2022.107460
Kennedy, Douglas S; Anderson, John B (1989): Glacial-Marine Sedimentation and Quaternary Glacial History of Marguerite Bay, Antarctic Peninsula. Quaternary Research, 31(2), 255-276, https://doi.org/10.1016/0033-5894(89)90008-2
Kirshner, Alexandra E; Anderson, John B; Jakobsson, Martin; O'Regan, Matthew; Majewski, Wojciech; Nitsche, Frank-Oliver (2012): Post-LGM deglaciation in Pine Island Bay, West Antarctica. Quaternary Science Reviews, 38, 11-26, https://doi.org/10.1016/j.quascirev.2012.01.017
Lepp, Allison; Simkins, Lauren M; Anderson, John B; Clark, Rachel W; Wellner, Julia S; Hillenbrand, Claus-Dieter; Smith, James A; Lehrmann, Asmara A; Totten, Rebecca; Larter, Robert D; Hogan, Kelly A; Nitsche, Frank-Oliver; Graham, Alastair G C; Wacker, L (2022): Sedimentary Signatures of Persistent Subglacial Meltwater Drainage From Thwaites Glacier, Antarctica. Frontiers in Earth Science, 10, 863200, https://doi.org/10.3389/feart.2022.863200
O'Regan, Matt; Cronin, Thomas M; Reilly, Brendan T; Alstrup, Aage Kristian Olsen; Gemery, L; Golub, Anna; Mayer, Larry A; Morlighem, Mathieu; Moros, Matthias; Munk, Ole Lajord; Nilsson, Johan; Pearce, Christof; Detlef, Henrieka; Stranne, Christian; Vermassen, Flor; West, Gabriel; Jakobsson, Martin (2021): The Holocene dynamics of Ryder Glacier and ice tongue in north Greenland. The Cryosphere, 15(8), 4073-4097, https://doi.org/10.5194/tc-15-4073-2021
Prothro, Lindsay O; Simkins, Lauren M; Majewski, Wojciech; Anderson, John B (2018): Glacial retreat patterns and processes determined from integrated sedimentology and geomorphology records. Marine Geology, 395, 104-119, https://doi.org/10.1016/j.margeo.2017.09.012
Rüther, Denise C; Bjarnadóttir, Lilja Rún; Junttila, Juho; Husum, Katrine; Rasmussen, Tine Lander; Lucchi, Renata G; Andreassen, Karin (2012): Pattern and timing of the northwestern Barents Sea Ice Sheet deglaciation and indications of episodic Holocene deposition. Boreas, 41(3), 494-512, https://doi.org/10.1111/j.1502-3885.2011.00244.x
Simkins, Lauren M; Anderson, John B; Greenwood, Sarah L; Gonnermann, Helge M; Prothro, Lindsay O; Halberstadt, Anna Ruth W; Stearns, L A; Pollard, David; DeConto, Robert M (2017): Anatomy of a meltwater drainage system beneath the ancestral East Antarctic ice sheet. Nature Geoscience, 10(9), 691-697, https://doi.org/10.1038/ngeo3012
Smith, James A; Andersen, Thorbjørn Joest; Shortt, M; Gaffney, A M; Truffer, Martin; Stanton, T P; Bindschadler, Robert A; Dutrieux, Pierre; Jenkins, Adrian; Hillenbrand, Claus-Dieter; Ehrmann, Werner; Corr, Hugh F J; Farley, N; Crowhurst, S; Vaughan, David G (2017): Sub-ice-shelf sediments record history of twentieth-century retreat of Pine Island Glacier. Nature, 541(7635), 77-80, https://doi.org/10.1038/nature20136
Witus, Alexandra E; Branecky, Carolyn M; Anderson, John B; Szczuciński, Witold; Schroeder, Dustin M; Blankenship, Donald D; Jakobsson, Martin (2014): Meltwater intensive glacial retreat in polar environments and investigation of associated sediments: example from Pine Island Bay, West Antarctica. Quaternary Science Reviews, 85, 99-118, https://doi.org/10.1016/j.quascirev.2013.11.021
Funding:
National Science Foundation (NSF), grant/award no. 1738942: Thwaites Offshore Research project, a component of the International Thwaites Glacier Collaboration
Natural Environment Research Council (NERC), grant/award no. NE/S006664/1: Thwaites Offshore Research project, a component of the International Thwaites Glacier Collaboration
Natural Environment Research Council (NERC), grant/award no. NE/S006672/1: Thwaites Offshore Research project, a component of the International Thwaites Glacier Collaboration
Coverage:
Median Latitude: -18.844396 * Median Longitude: -122.292941 * South-bound Latitude: -81.640000 * West-bound Longitude: 17.200000 * North-bound Latitude: 81.950000 * East-bound Longitude: -50.970000
Date/Time Start: 2019-02-27T02:19:00 * Date/Time End: 2019-03-10T03:11:00
Minimum Elevation: -894.0 m * Maximum Elevation: 615.0 m
Event(s):
Comment:
File descriptions:
The excel file GrainShapeMetrics.xlsx contains the values of grain-shape measurements with each study region in a different tab, with the first tab called READ_ME providing details of the metrics, units, references to documentation, and explanations of each column header. The MATLAB script, GrainShapeAnalysis_Binarized.mlx, which is used to process grain images, convert images to binary, and calculate the measurements presented in the Excel file is also included. Sample metadata is available in the Excel file Events_Metadata.xlsx.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Binary Object | Binary | Lepp, Allison | |||
| 2 | File content | Content | Lepp, Allison |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Basic curation (CurationLevelB)
Size:
6 data points