USAP-DC

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MOA-derived Structural Feature Map of the Ross Ice Shelf Data DOI: https://doi.org/10.15784/601432 Cite as Hulbe, C., Forbes, M., & Ledoux, C. (2021) "MOA-derived Structural Feature Map of the Ross Ice Shelf" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601432. AMD - DIF Record(s) NSIDC-0497_1 Abstract The surface of the Ross Ice Shelf (RIS) is textured by flow stripes, crevasses and other fea- tures related to ice flow and deformation. Here, moderate resolution optical satellite images are used to map and classify regions of the RIS characterized by different surface textures. Because the textures arise from ice deformation, the map is used to identify structural provinces with common deformation history. We classify four province types: regions associated with large outlet glaciers, shear zones, exten- sion downstream of obstacles and suture zones between provinces with different upstream sources. Adjacent provinces with contrasting histories are in some locations deforming at different rates, suggest- ing that our province map is also an ice fabric map. Structural provinces have more complicated shapes in the part of the ice shelf fed by West Antarctic ice streams than in the part fed by outlet glaciers from the Transantarctic Mountains. The map may be used to infer past variations in stress conditions and flow events that cannot be inferred from flow traces alone. Creator(s): Hulbe, Christina; Ledoux, Christine Date Created: 2021-02-19 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -150, East: 155, South: -86, North: -77 Award(s) NSF 0440670 Version: 1 Related Project(s) Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams References Ledoux, Christine M., Hulbe, Christina L., Forbes, Martin P., Scambos, Ted A., Alley, Karen. Structural provinces of the Ross Ice Shelf, Antarctica. Annals of Glaciology 58(75pt1) 2017. (doi:10.1017/aog.2017.24) Keywords Antarctica