Abstract:
Variability in temperature, salinity and velocity was observed approximately 1.5 m beneath the base of Thwaites Glacier in the grounding zone region of the Eastern Ice Shelf as part of the International Thwaites Glacier Collaboration MELT project. Using a borehole deployable turbulence instrument cluster, the average temperature, salinity and velocity was observed over a 15-minute period every 2 hours.
Funding was provided by NSFPLR-NERC: Melting at Thwaites grounding zone and its control on sea level (THWAITES-MELT) NE/S006761/1.
Keywords:
Antarctica, ITGC, Salinity, Temperature, Thwaites Glacier, Velocity
Davis, P., Nicholls, K., & Holland, D. (2021). Thwaites MELT: Temperature, salinity and velocity time series from the grounding zone region of Thwaites Glacier Eastern ice shelf (2020) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/4ffad557-1c3c-4ea7-a73d-6d782331b08a
| Access Constraints: | Dataset is under embargo until the publication of the associated paper. |
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| Use Constraints: | Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2021-02-22 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK Polar Data Centre |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Peter E D Davis |
| Role(s) | Investigator, Technical Contact |
| Organisation | British Antarctic Survey |
| Name | Keith W Nicholls |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | David M Holland |
| Role(s) | Investigator |
| Organisation | New York University |
| Parent Dataset: | N/A |
| Reference: | Davis, P.E.D., Nicholls, K.W., Holland, D.M. et al. Suppressed basal melting in the eastern Thwaites Glacier grounding zone. Nature 614, 479-485 (2023). https://doi.org/10.1038/s41586-022-05586-0 | |
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| Quality: | The temperature data have an accuracy of ±0.002°C. The conductivity data have an accuracy of ±0.0003 S/m. The velocity data have an accuracy of ±0.1 cm/s. The RBRconcerto CT and Nobska MAVS were factory calibrated prior to deployment. Missing values are represented with -9999. | |
| Lineage/Methodology: | The temperature and salinity data was collected using an RBRconcerto CT. The velocity data was collected using a Nobska MAVS (Modular Acoustic Velocity Sensor) differential acoustic travel-time 3-D velocity sensor. The instruments were attached to a battery, solar panel, and British Antarctic Survey datalogger at the ice surface. The 15-minute average values were calculated and stored on the datalogger every 2 hours. | |
| Temporal Coverage: | |
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| Start Date | 2020-01-23 |
| End Date | 2021-02-01 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -75.20718 |
| Northernmost | -75.20718 |
| Longitude | |
| Westernmost | -104.8254 |
| Easternmost | -104.8254 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | 521.3 dbar |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | N/A |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | 15-minute average observed every two hours |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Thwaites Glacier |
| Sensor(s): |
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| Data Collection: | RBRconcerto CT Nobska MAVS (Modular Acoustic Velocity Sensor) differential acoustic travel-time 3-D velocity sensor |
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 358 kB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | 1 file as tab separated values (TSV). |