Ground-penetrating radar data (50MHz) and internal reflection horizons along the central flowline of Ekström ice shelf, Dronning Maud Land, East Antarctica - netCDF file ...

• Main Authors: Oraschewski, Falk M, Moss, Guy, Koch, Inka, Ershadi, M Reza, Eisen, Olaf, Drews, Reinhard
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: Antarctica; Dronning Maud Land; Ekström; flowline; ground-penetrating radar; Ice shelf; Internal Reflection Horizon; IRH; radar; ANT-Land_2022_ReMeltRadar; NEUMAYER III; East Antarctica; Neumayer; Ekström Ice Shelf; Antarc*; Ice Shelf; Ice Shelves
• Online Access: https://dx.doi.org/10.1594/pangaea.965141; https://doi.pangaea.de/10.1594/PANGAEA.965141

The internal stratigraphic structure of ice shelves forms by the interplay of ice dynamics, snow accumulation and basal melt. To infer accumulation and basal melt rates, we acquired a ground-penetrating radar profile (50 MHz; pulseEKKO (R) from Sensors & Software Inc.) along the central flowline of Ekström ice shelf, Droning Maud Land, East Antarctica. The data were collected in the two consecutive field seasons 2021/22 and 2022/23 with logistic support from Neumayer III station (Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 2016). The profile starts about 5 km upstream of the grounding line and ends at a distance of 10 km to the ice shelf front, giving a total length of 129.3 km. Radar processing with ImpDAR (Lilien et al., 2020) encompassed trace averaging to equidistant spacing (10 m) and bandpass filtering (cut-off frequencies of 20 and 75 MHz). In addition, the REMA surface elevation (Howat et al., 2019) and the ice-ocean interface from BedMachine (Morlighem et al., 2017) ...