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Pennell Trough, Ross Sea bathymetry and glacial landforms Data DOI: https://doi.org/10.15784/601474 Cite as Simkins, L., Anderson, J., Eareckson, E., Greenwood, S., Munevar Garcia, S., & Prothro, L. (2021) "Pennell Trough, Ross Sea bathymetry and glacial landforms" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601474. AMD - DIF Record(s) USAP-1745043_1 Abstract Bathymetry from multibeam echo sounding data in Pennell Trough, Ross Sea, Antarctica was collected onboard the RVIB Nathaniel B. Palmer (NBP) 15-02 cruise using a Kongsberg EM122 operating in dual swath mode at 12 kHz frequency with a 1°×1° beam width, swath angular coverage set to 62°×62°, and 30-60% overlap between survey lines. All raw, ping-edited geophysical data collected on NBP15-02 can be accessed using the Marine Geoscience Data System (Cruise DOI: 10.7284/901477). The bathymetry dataset here is gridded at 20-m resolution with a water depth-dependent vertical resolution on the order of decimeters. Two shapefiles are provided for ice-marginal landforms and meltwater landforms observable in the bathymetry data. The purpose of collecting the bathymetry data on cruise NBP15-02 was to better understand the glacial history of the Ross Sea, and the dataset, inclusive of bathymetry data and shapefiles of glacial landforms, from Pennell Trough are used to understand impacts on subglacial channel morphology and organization during the deglaciation of the region following the Last Glacial Maximum. The published dataset was used and analyzed in the article "Topographic controls on channelized meltwater in the subglacial environment" by Simkins, L.M., Greenwood, S.L., Munevar Garcia, S., Eareckson, E.A., Anderson, J.B., and Prothro, L.O, which was published in Geophysical Research Letters in 2021 (DOI: 10.1029/2021GL094678). Creator(s): Simkins, Lauren; Greenwood, Sarah; Munevar Garcia, Santiago; Eareckson, Elizabeth; Anderson, John; Prothro, Lindsay Date Created: 2021-10-04 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: 174, East: 178, South: -77, North: -75 Award(s) NSF 1246353 NSF 1745043 NSF 1745055 Version: 1 Related Project(s) Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum. Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations References Simkins, L. M., Greenwood, S. L., & Anderson, J. B. (2018). Diagnosing ice sheet grounding line stability from landform morphology. The Cryosphere, 12(8), 2707–2726. (doi:10.5194/tc-12-2707-2018) Simkins, L.M., Greenwood, S.L., Munevar Garcia, S., Eareckson, E.A., Anderson, J.B., & Prothro, L.O. (2021). Topographic controls on channelized meltwater in the subglacial environment. Geophysical Research Letters, 10.1029/2021GL094678. (doi:10.1029/2021GL094678) Keywords Antarctica Bathymetry Elevation Geomorphology Geomorphology Glacial History Glaciers/ice Sheet Marine Geoscience NBP1502 Pennell Trough R/v Nathaniel B. Palmer Ross Sea