|
Description
|
Ongoing climate change is significantly altering the Arctic cryosphere, where glaciers are undergoing accelerated retreat. The internal thermal structure of glaciers and their subglacial conditions influence this retreat, yet remain poorly constrained across most of the Arctic. Surface-deployed Distributed Acoustic Sensing (DAS) can offer a cost-effective and logistically practical alternative to conventional geophones for seismic monitoring, but its use for active-seismic englacial and subglacial imaging on glaciers remains largely untested. This dataset contains the data used in the proof-of-concept study "Active Seismic Characterisation of an Arctic Glacier Using Distributed Acoustic Sensing" by Myklebust, Landrø, Rørstadbotnen and Robinson (Near Surface Geophysics, accepted 2026-09-17). The seismic data were acquired in March 2025 along an approximately 2 km profile in the ablation zone of Slakbreen glacier, Svalbard, Norway, where the lack of significant firn preserves DAS sensitivity to both P- and S-waves. Surface explosive sources (detonating cord) were recorded simultaneously by a trenched fibre-optic cable interrogated as a DAS array and by a co-located vertical-component geophone array. In the related publication, both datasets are processed with a time-migration workflow (PP-imaging for geophones; PP- and PS-imaging for DAS), showing that the combined PP- and PS-DAS images recover nearly equivalent subsurface information to the geophone PP image. Although the geophone PP image is superior in imaging quality, the related publication show that surface DAS shows potential to be a viable, logistically favourable and cost-effective seismic tool for glacier imaging. The dataset contains inline and cross-line DAS shot records (strain, resampled to 2 ms and 2 m), inline vertical-component geophone shot records (raw counts, proportional to vertical particle velocity), a log of the DAS acquisition parameters per shot, and coordinate tables mapping the local processing coordinates in the SEG-Y headers to UTM coordinates (WGS84 / UTM zone 33N). In addition, three raw ground-penetrating radar (GPR) profiles (25 MHz and 50 MHz) acquired along the glacier in March 2024 are included. See 00_README.txt for details on acquisition, processing and file structure. (2026-10-06)
|
|
Related Publication
| Is Supplement To: Myklebust, T. H., Landrø, M., Rørstadbotnen, R. A., & Robinson, C. (submitted). Active Seismic Characterisation of an Arctic Glacier Using Distributed Acoustic Sensing. Near Surface Geophysics. |
