MATLAB script for grain images and grain-shape metrics of glacial sediments from Antarctica, Northwest Greenland, and the central Barents Sea

• Main Authors: 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
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: 19-KP-H6; Amundsen Sea; Binary Object; CAGE-15-5-1221-GC; CAGE-15-5-1222-GC; DF85-115-PC; DF85-116-PC; File content; GC; Grab; grain micromorphology; Gravity corer; ICEDRILL; Ice drill; JGC; JM-KA09-GC; Jumbo gravity core; KAL; Kasten corer; meltwater plume deposits; Nathaniel B. Palmer; NBP15-02_KC17; NBP15-02_KC19; NBP15-02_KC22; NBP15-02_KC24; NBP19-02; NBP19-02_JGC11; NBP19-02_JGC17; NBP19-02_KC04; NBP19-02_KC13; NBP19-02_KC15; NBP19-02_KC23; NBP20-02_KC26; NBP20-02_KC33; NBP20-02_KC67; OD1507-18-GC; OD1507-31-PC; OSO09-10_KC04; OSO09-10_KC18; OSO09-10_KC25; PC; PCOR; Percussion corer; PIG-B; Piston corer; Qaanaaq_1A; Qaanaaq_2A; Qaanaaq_3A; RCD; Antarctic; Barents Sea; Ross Sea; Greenland; Marguerite; Marguerite Bay; Ryder; Ryder Glacier; Antarc*; glacier; Pine Island
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.961704; https://doi.org/10.1594/PANGAEA.961704

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.