Abstract:
The basal melt rate at a single location beneath Pine Island Ice Shelf was observed using an autonomous phase-sensitive radio echo-sounder (ApRES) during 2014. The ApRES was deployed approximately 10 km from the ice shelf front where the ice was 492 m thick and the ice shelf draft was approximately 422 m. The ApRES was deployed as part of the NERC Ice Sheet Stability Program (iStar).
Funding was provided by the NERC Ice Sheet Stability Research Program.
Keywords:
ApRES, Melt rate, Pine Island, iStar
Lok, L., Nicholls, K., Brennan, P., & Davis, P. (2018). Basal Melt Rate Beneath Pine Island Ice Shelf (2014) (Version 1.0) [Data set]. Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/0cf552a6-cd62-4da0-8289-8e4bab0a35a8
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2018-10-09 |
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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 PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Peter Davis |
| Role(s) | Technical Contact, Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Keith Nicholls |
| Role(s) | Investigator, Technical Contact |
| Organisation | British Antarctic Survey |
| Name | Prof Paul Brennan |
| Role(s) | Investigator |
| Organisation | University College London |
| Name | Dr Lai B Lok |
| Role(s) | Investigator |
| Organisation | Lancaster University |
| Parent Dataset: | N/A |
| Reference: | Davis, P. E. D., Jenkins, A., Nicholls, K. W., Brennan, P. V., Povl Abrahamsen, E., Heywood, K. J., et al. ( 2018). Variability in basal melting beneath Pine Island Ice Shelf on weekly to monthly timescales. Journal of Geophysical Research: Oceans, 123, 8655-8669. https://doi.org/10.1029/2018JC014464 Nicholls, K. W., Corr, H. F. J., Stewart, C. L., Lok, L. B., Brennan, P. V., & Vaughan, D. G. (2015). A ground-based radar for measuring vertical strain rates and time-varying basal melt rates in ice sheets and shelves. Journal of Glaciology, 61(230), 1079-1087. doi:10.3189/2015JoG15J073 |
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| Quality: | The basal melt rate has an accuracy of ±0.2 m/yr and has been fully quality controlled. There are no missing values. Resolution: Two hourly resolution with a 48-hour low pass filter applied. |
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| Lineage: | The data was processed following Nicholls et al. (2015). Formally, the raw Lagrangian ice shelf thinning rate at two-hourly resolution was derived from the time-derivative of the distance between the ApRES antennas and the ice shelf base, and includes the basal melt rate signal as well as a component of ice-column vertical strain rate resulting from ice flow and snow compaction. To remove the component of ice-column vertical strain rate due to tidal variations, the raw thinning rate was low-pass filtered using a cut-off at 48 hours. At frequencies lower than this, variability in the strain rate component is small compared with the basal melt rate and varies on a much longer timescale than those of interest here. | |
| Temporal Coverage: | |
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| Start Date | 2014-01-13 |
| End Date | 2014-11-30 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -74.96789 |
| Northernmost | -74.96789 |
| Longitude | |
| Westernmost | -100.9964 |
| Easternmost | -100.9964 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Pine Island Ice Shelf |
| Data Collection: | Instrumentation: Autonomous phase-sensitive radio echo-sounder |
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| Data Storage: | Data is approximately 200 KB and is 1 file in ASCII format. |
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