The 2017 catastrophic subsidence in the Dålk Glacier: Unmanned aerial survey and digital terrain analysis
- Published
- Accepted
- Subject Areas
- Spatial and Geographic Information Science
- Keywords
- unmanned aerial system, digital elevation model, glaciology, natural hazard, Antarctica
- Copyright
- © 2018 Florinsky et al.
- Licence
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ Preprints) and either DOI or URL of the article must be cited.
- Cite this article
- 2018. The 2017 catastrophic subsidence in the Dålk Glacier: Unmanned aerial survey and digital terrain analysis. PeerJ Preprints 6:e27064v1 https://doi.org/10.7287/peerj.preprints.27064v1
Abstract
We present the first results from a study of the 2017 catastrophic subsidence in the Dålk Glacier, East Antarctica using an unmanned aerial system (UAS) and UAS-derived DEMs. The subsided portion of the Dålk Glacier and adjacent territory was surveyed in two flights, before and after the collapse. The survey was performed by Geoscan 201, a small flying-wing UAS. Aerial images have an average resolution of 6 cm. Using Agisoft PhotoScan software, we generated two DEMs with a resolution of 22 cm related to the pre- and post-collapsed glacier surface. To model the pre-collapsed subglacial cavern, one DEM was subtracted from the other. Finally, we discuss a probable mechanism of the catastrophic subsidence.
Author Comment
This paper was presented at the Geomorphometry 2018 conference in Boulder, CO in August 2018.