edu.ucar.opensky::articles:43592 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T17:56:55.641557 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d7pz5f8v https://doi.org/10.5067/68TBT0CGJSOJ https Related Dataset #1 MODIS Mosaic of Antarctica 2003-2004 (MOA2004) Image Map, Version 2 https://doi.org/10.5067/C2GFER6PTOS4 https Related Dataset #2 MEaSUREs BedMachine Antarctica, Version 1 https://doi.org/10.5067/D7GK8F5J8M8R https Related Dataset #3 MEaSUREs InSAR-Based Antarctica Ice Velocity Map, Version 2 https://doi.org/10.5067/RNF17BP824UM https Related Dataset #4 MEaSUREs MODIS Mosaic of Antarctica 2013-2014 (MOA2014) Image Map, Version 1 https://doi.org/10.7265/N5KP8037 https Related Dataset #5 MODIS Mosaic of Antarctica 2008-2009 (MOA2009) Image Map Fracture criteria and tensile strength for natural glacier ice calibrated from remote sensing observations of Antarctic ice shelves 2025-01-21T00:00:00Z publication https://n2t.net/ark:/85065/d7pz5f8v https://doi.org/10.1017/jog.2024.104 Wells-Moran, S. author Meghana Ranganathan author Minchew, B. author UCAR/NCAR - Library publisher The conditions under which ice fractures and calves icebergs from Antarctic ice shelves are poorly understood due largely to a lack of relevant observations. Though previous studies have estimated the stresses at which ice fractures in the laboratory and through sparse observations, there remains significant uncertainty in the applicability of these results to naturally deforming glacier ice on larger scales. Here, we aim to better constrain the stresses under which ice fractures using remote sensing data by identifying large-scale fractures on Antarctic ice shelves, calculating the principal stresses from the observed strain rates and comparing the stresses of unfractured and fractured areas. Using the inferred stresses, we evaluate five common fracture criteria: Mohr&#8211;Coulomb, von Mises, strain energy, Drucker&#8211;Prager and Hayhurst. We find the tensile strength of ice ranges from 202 to 263 $\mathrm{kPa}$ assuming the viscous stress exponent n = 3, narrowing the range produced by previous observational studies. For n = 4, we find tensile strengths of 423&#8211;565 $\mathrm{kPa}$ , bringing our inferences closer to alignment with laboratory experiments. Importantly, we show that crevassed and uncrevassed areas in the four largest ice shelves are distinct in principal stress space, suggesting our results apply to all ice shelves and the broader ice sheet. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication <span style="font-family:Arial;font-size:10pt;font-style:normal;" data-sheets-root="1">Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</span> None eng geoscientificInformation