Ice thickness and bed topography maps derived from radar and GPS profiles over Blåskimen Island in Western Dronning Maud Land

• Main Authors: Goel, Vikram, Brown, Joel, Matsuoka, Kenichi
• Format: Dataset
• Language: unknown
• Published: npolar.no 2017
• Subjects: Blåskimen; Dronning Maud Land; Fimbul Ice Shelf; Antarc*; Antarctica; Blåskimen Island; Ice Shelf
• Online Access: https://dx.doi.org/10.21334/npolar.2018.65c6b172; https://data.npolar.no/dataset/65c6b172-fa80-4478-a545-5e0bb8137e38

This dataset provides ice thickness calculated using four deep-sounding (2 MHz antenna frequency) radar profiles over Blåskimen Island ice rise, Fimbul Ice Shelf, Dronning Maud land. Ice thickness was estimated by converting the two way travel time of the radar signal from surface to the bed. The calculation takes into account the increased propagation speed in the top surface firn layer (method described in Goel et. al., 2017). The dataset also provides the bed elevation along the same profiles, obtained by subtracting ice thickness from surface elevation data. The data are provided in MATLAB (.mat) file format in a file named ‘ITdat.mat’: It includes following arrays- • ‘LAT’ and ‘LON’ shows the coordinates as per WGS84 ellipsoid in decimal degrees • ‘X’ and ‘Y’ shows the coordinates in polar stereographic projection parallel to 71°S (EPSG 3031) • ‘IT’ and ‘BE’ shows the ice thickness and bed elevation in meters • ‘TWT’ shows the actual two way travel time from surface to the bed in seconds • ‘XX’, ‘YY’, ‘TT’ and ‘BB’ are matrices with interpolated gridded x-coordinate, y-coordinate, ice thickness and bed elevation data respectively See the following manuscript for further details: Goel, V., Brown, J., and Matsuoka, K.: Glaciological settings and recent mass balance of Blåskimen Island in Dronning Maud Land, Antarctica, The Cryosphere Discuss., https://doi.org/10.5194/tc-2017-61, in review, 2017.