Baseline data for monitoring geomorphological effects of glacier lake outburst flood: a very-high-resolution image and GIS datasets of the distal part of the Zackenberg River, northeast Greenland
<p>The polar regions experience widespread transformations, such that efficient methods are needed to monitor and understand Arctic landscape changes in response to climate warming and low-frequency, high-magnitude hydrological and geomorphological events. One example of such events, capable o...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Copernicus Publications
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/2cb739ca2ae74fba9fac7408a5885601 |
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| Sumario: | <p>The polar regions experience widespread transformations, such that efficient
methods are needed to monitor and understand Arctic landscape changes in
response to climate warming and low-frequency, high-magnitude hydrological
and geomorphological events. One example of such events, capable of causing
serious landscape changes, is glacier lake outburst floods. On 6 August 2017, a flood event related to glacial lake outburst affected the Zackenberg
River (NE Greenland). Here, we provided a very-high-resolution dataset
representing unique time series of data captured immediately before (5 August 2017), during (6 August 2017), and after (8 August 2017) the flood.
Our dataset covers a 2.1 km long distal section of the Zackenberg River. The
available files comprise (1) unprocessed images captured using an unmanned
aerial vehicle (UAV; <a href="https://doi.org/10.5281/zenodo.4495282">https://doi.org/10.5281/zenodo.4495282</a>, Tomczyk and Ewertowski, 2021a) and (2) results of structure-from-motion (SfM) processing (orthomosaics, digital elevation
models, and hillshade models in a raster format), uncertainty assessments
(precision maps), and effects of geomorphological mapping in vector formats
(<a href="https://doi.org/10.5281/zenodo.4498296">https://doi.org/10.5281/zenodo.4498296</a>, Tomczyk and
Ewertowski, 2021b). Potential applications of the presented dataset include
(1) assessment and quantification of landscape changes as an immediate
result of a glacier lake outburst flood; (2) long-term monitoring of
high-Arctic river valley development (in conjunction with other datasets);
(3) establishing a baseline for quantification of geomorphological impacts
of future glacier lake outburst floods; (4) assessment of geohazards related
to bank erosion and debris flow development (hazards for research station
infrastructure – station buildings and bridge); (5) monitoring of
permafrost degradation; and (6) modelling flood impacts on river ecosystem,
transport capacity, and channel stability.</p> |
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