Pierce, Ethan; Overeem, Irina: Mendenhall Glacier basal ice-sediment outcrop samples, 2021 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.968497 (dataset in review)
Abstract:
We gathered field observations of debris-rich ice layers from an alpine glacier margin to help inform models of glacial sediment transport across landscapes. Basal ice and entrained sediment samples were taken from the margin of Mendenhall Glacier, Juneau, AK, in August 2021. Along the land-terminating margin of the glacier, we identified five representative outcrops of debris-rich ice with obvious stratigraphic layers. Samples were taken in duplicate at intervals from the base of the debris-rich layers to the clean ice above. After removing the outermost layer of sediment, which is typically enriched by surface melt, we weighed the samples in the field, then transported them back to the Sedimentology and Plant Lab at the Institute of Arctic and Alpine Research in Boulder, Colorado. In the lab, samples were freeze-dried to remove the ice fraction, then weighed again to obtain sediment mass, and thus sediment concentration.
Related to:
Pierce, Ethan; Overeem, Irina; Carlson, Brandee (2022): Modeling sediment entrainment at the ice-bed interface. AGU Fall Meeting Abstracts, 2022, C45D-1125
Pierce, Ethan; Overeem, Irina; Jouvet, Guillaume (submitted): Modeling sediment fluxes from debris-rich basal ice layer.
Coverage:
Median Latitude: 58.442434 * Median Longitude: -134.552088 * South-bound Latitude: 58.441500 * West-bound Longitude: -134.552760 * North-bound Latitude: 58.443860 * East-bound Longitude: -134.551620
Date/Time Start: 2021-08-22T00:00:00 * Date/Time End: 2021-08-23T00:00:00
Minimum HEIGHT above ground: 0.18 m * Maximum HEIGHT above ground: 1.95 m
Event(s):
MH21_C1 (Column_1) * Latitude: 58.441500 * Longitude: -134.551620 * Date/Time: 2021-08-22T00:00:00 * Location: Mendenhall Glacier, Juneau, Alaska * Method/Device: Outcrop sample (OUTCROP)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Pierce, Ethan | |||
| 2 | Sample code/label | Sample label | Pierce, Ethan | |||
| 3 | Identification | ID | Pierce, Ethan | |||
| 4 | Laboratory code/label | Lab label | Pierce, Ethan | |||
| 5 | HEIGHT above ground | Height | m | Pierce, Ethan | Geocode – Height above bed | |
| 6 | Mass | Mass | g | Pierce, Ethan | Weighted | Total mass |
| 7 | Mass | Mass | g | Pierce, Ethan | Weighted | Bottle mass |
| 8 | Mass | Mass | g | Pierce, Ethan | Weighted | Sediment and water mass |
| 9 | Sediment, dry mass | Sed dm | g | Pierce, Ethan | Weighted | |
| 10 | Sediments | Sediments | % | Pierce, Ethan | Calculated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Data-level curation (CurationLevelD)
Size:
296 data points