RESPONDER: Observations of a supraglacial lake drainage event at Lake 028 on Store Glacier, Greenland, July 2018

Datasets from the Resolving subglacial properties, hydrological networks and dynamic evolution of ice flow on the Greenland Ice Sheet (RESPONDER) project as published in the paper by Chudley et al. entitled "Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier". Please cite this paper if using this data.

This dataset consists of observations of the rapid drainage of a supraglacial lake on Store Glacier, a marine-terminating outlet glacier of the west Greenland Ice Sheet. 'Lake 028', located 70.57degN, 50.08degW, drained on 2018-07-07 and was recorded using a variety of geophysical instrumentation. The dataset presented here includes all data necessary to replicate the findings presented in the main paper, including UAV photogrammetry-derived raster data (producing a series of orthophotos, digital elevation models, and velocity fields) and time-series records from in-situ geophysical instrumentation (GPS receiver, geophone, and water pressure sensor).

Funding was provided by NERC DTP grant NE/L002507/1 and ERC Horizon 2020 grant 683043.

Date (Creation): 2019-11-06

Date (Revision): 2019-11-06

Date (Publication): 2019-11-06

Date (released): 2019-11-06

Edition: 1.0

Unique resource identifier: https://doi.org/10.5285/481d4120-1a72-468b-8cd4-84b4e14cdeab

Codespace: doi

Unique resource identifier: GB/NERC/BAS/PDC/01255

Codespace: https://data.bas.ac.uk/

Unique resource identifier: NE/L002507/1

Codespace: award

Other citation details: Please cite this item as: Chudley, T., Doyle, S., Schoonman, C., & Bougamont, M. (2019). RESPONDER: Observations of a supraglacial lake drainage event at Lake 028 on Store Glacier, Greenland, July 2018 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/481d4120-1a72-468b-8cd4-84b4e14cdeab

Credit: No credit.

Status: Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Cambridge	Chudley, Thomas		Author
Aberystwyth University	Doyle, Samuel		Author
University of Cambridge	Schoonman, Charlotte		Author
University of Cambridge	Bougamont, Marion		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency: As needed

Maintenance note: Completed

Global Change Master Directory (GCMD) Science Keywords

Theme

Greenland
glaciology
hydrology
ice sheets
lakes

Place

Store Glacier Greenland

GEMET - INSPIRE themes, version 1.0

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Access constraints: Other restrictions

Other constraints: no limitations

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Other constraints: Open Government Licence v3.0

Use constraints: Other restrictions

Other constraints: This data is supplied under Open Government Licence v3.0

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Spatial representation type: Text, table

Language: English

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Geoscientific information
Imagery base maps earth cover
Inland waters

Begin date: 2019-09-04

End date: 2019-09-24

Supplemental Information: It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title: European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication): 2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier: urn:ogc:def:crs:EPSG::3031

Version: 6.18.3

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NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Distributor

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Hierarchy level: Dataset

Statement: Methodology:

By the 2018-07-07 lake drainage event, Lake 028 was instrumented with a GPS receiver, seismometer, and pressure transducer sensor. A dual-frequency GPS was installed ~600 m upstream of the lake in July 2017, and by July 2018 had advected into a position immediately south of the lake. A seismometer was installed in May 2018, and a water-level sensor on 2018-07-04. From this date, regular UAV surveys (See SI Appendix, Table S1 in associated publication) were performed over the lake and surrounding environments.

A detailed description of the data collection, quality control, processing and analysis is given in: Chudley, T.R., Christoffersen, P., Doyle, S. H., Bougamont, M., Schoonman, C. M., Hubbard, B., and James, M. (2019) Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. doi:10.1073/pnas.1913685116

Data collection:

UAV: Custom-built Skywalker X8 fixed-wing UAV running ArduPlane autopilot software, collecting imagery with a Sony α6000 and GPS data with an Emlid Reach receiver. Images processed in Agisoft Metashape v 1.4.3.

Pressure Transducer: Solinst 3001 Levelogger

GPS: Trimble NetR7 GPS with Trimble Zephyr Geodetic III Antenna

Seismometer: HG-7 geophone recorded to a DiGOS DATA-CUBE

Data quality:

GPS data have been filtered with a two-pole, low-pass Butterworth filter with a 30-minute cutoff period. This 30-minute window was chosen based on a worst-case horizontal positional uncertainty of 0.035 m and a base ice velocity of ~650 m a-1, following from which assumptions the period over which velocities can be resolved is ~0.5 hours. Uncertainty was calculated based on a conservative estimate of the positional uncertainty of ±1 cm propagated through the velocity calculation.

Seismometer data were decimated to 100 sps and a 2-pole, zero-phase bandpass filter (10-50 Hz) was applied to eliminate instrument and high-frequency noise.

We assign UAV-derived orthophoto and DEM data uncertainties of ±0.12 m horizontally (~1.1x the ground sampling distance) and ±0.14 m vertically (~1.3x the ground sampling distance), following Chudley et al. (Cryosphere, 13, 955-968, 2019). Uncertainties in the velocity field were calculated based upon a displacement uncertainty of 0.17 m.

A detailed description of the data collection, quality control, processing and analysis is given in:

Chudley, T.R., Christoffersen, P., Doyle, S. H., Bougamont, M., Schoonman, C. M., Hubbard, B., and James, M. (2019) Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. doi:10.1073/pnas.1913685116

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File identifier: 481d4120-1a72-468b-8cd4-84b4e14cdeab XML

Metadata language: English

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Hierarchy level: Dataset

Hierarchy level name: dataset

Date stamp: 2019-11-06

Metadata standard name: ISO 19115 Geographic Information - Metadata

Metadata standard version: ISO 19115:2003(E)

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Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact

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