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

DOI

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) were obtained along the profile line. The segments from both field seasons were connected without adjustments, because the vertical offset between IRHs is much smaller than the radar system's wavelength in ice (~3.4 m). The data shows the ice-ocean interface and continuous internal reflection horizons (IRHs) down to approximately 200 m depth. 4 IRHs were traced along the (nearly) entire length of the profile using a semi-automatic maximum tracking scheme (Koch et al., 2023).

Identifier
DOI https://doi.org/10.1594/PANGAEA.965143
Related Identifier IsSupplementTo https://doi.org/10.48550/ARXIV.2312.02997
Related Identifier IsVariantFormOf https://doi.org/10.1594/PANGAEA.965141
Related Identifier References https://doi.org/10.17815/jlsrf-2-152
Related Identifier References https://doi.org/10.5194/tc-13-665-2019
Related Identifier References https://doi.org/10.1017/jog.2023.93
Related Identifier References https://doi.org/10.1017/aog.2020.44
Related Identifier References https://doi.org/10.1002/2017GL074954
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.965143
Provenance
Creator Oraschewski, Falk M ORCID logo; Moss, Guy; Koch, Inka ORCID logo; Ershadi, M Reza ORCID logo; Eisen, Olaf (ORCID: 0000-0002-6380-962X); Drews, Reinhard (ORCID: 0000-0002-2328-294X)
Publisher PANGAEA
Publication Year 2024
Funding Reference Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven https://doi.org/10.13039/501100003207 Crossref Funder ID AWI_ANT_18 ReMeltRadar; German Research Foundation https://doi.org/10.13039/501100001659 Crossref Funder ID DR 822/3-1 Emmy Noether Program DR 822/3-1
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 277616 data points
Discipline Earth System Research
Spatial Coverage (-8.899W, -71.766S, -8.275E, -70.674N)
Temporal Coverage Begin 2022-01-02T00:00:00Z
Temporal Coverage End 2023-02-21T00:00:00Z