Abstract:
Velocity and along-flow stress states were modelled for Larsen C ice shelf, before and after the calving of iceberg A68 in July 2017. The archive contains two sets of model outputs: i) flow velocity before and after calving, and the difference between these periods, and ii) along-flow stress before and calving, and the difference between these periods. The models are produced with the BISICLES ice sheet model. Additionally to high-resolution geo-referenced model outputs, a low-resolution image of each is provided for reference. The maps were produced by Dr Stephen Cornford, Swansea University.
The data is part of the NERC RACE project, NE/R012334/1.
Keywords:
Larsen, flow, ice shelf, iceberg calving, model, stress, velocity
Cornford, S. (2021). Flow velocity and along-flow stress products for Larsen C Ice Shelf, Antarctica, modelled before and after the calving event of Iceberg A68 in July 2017 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/664c6eba-7c6d-422d-bb13-7dd1bf5f6dba
| Access Constraints: | No restrictions apply. |
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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: | 2021-03-09 |
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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 Polar Data Centre |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Stephen Cornford |
| Role(s) | Investigator, Technical Contact |
| Organisation | Swansea University |
| Parent Dataset: | N/A |
| Reference: | Cornford, S. L., Martin, D. F., Payne, A. J., Ng, E. G., Le Brocq, A. M., Gladstone, R. M., Edwards, T. L., Shannon, S. R., Agosta, C., van den Broeke, M. R., Hellmer, H. H., Krinner, G., Ligtenberg, S. R. M., Timmermann, R., and Vaughan, D. G.: Century-scale simulations of the response of the West Antarctic Ice Sheet to a warming climate, The Cryosphere, 9, 1579-1600, https://doi.org/10.5194/tc-9-1579-2015, 2015. Cornford, S. L., Martin, D. F., Graves, D. T., Ranken, D. F., Le Brocq, A. M., Gladstone, R. M., Payne, A. J., Ng, E. G., & Lipscomb, W. H. (2013). Adaptive mesh, finite volume modeling of marine ice sheets. Journal of Computational Physics, 232(1), 529-549. https://doi.org/10.1016/j.jcp.2012.08.037. Luckman, A. (2020). Satellite-derived velocity maps for Larsen C Ice Shelf, Antarctica, between November 2017-April 2019 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/E5A119C7-15BE-4AD8-BF70-6CC8D112AF87. Fretwell, P., Pritchard, H. D., Vaughan, D. G., Bamber, J. L., Barrand, N. E., Bell, R., Bianchi, C., Bingham, R. G., Blankenship, D. D., Casassa, G., Catania, G., Callens, D., Conway, H., Cook, A. J., Corr, H. F. J., Damaske, D., Damm, V., Ferraccioli, F., Forsberg, R., Fujita, S., Gim, Y., Gogineni, P., Griggs, J. A., Hindmarsh, R. C. A., Holmlund, P., Holt, J. W., Jacobel, R. W., Jenkins, A., Jokat, W., Jordan, T., King, E. C., Kohler, J., Krabill, W., Riger-Kusk, M., Langley, K. A., Leitchenkov, G., Leuschen, C., Luyendyk, B. P., Matsuoka, K., Mouginot, J., Nitsche, F. O., Nogi, Y., Nost, O. A., Popov, S. V., Rignot, E., Rippin, D. M., Rivera, A., Roberts, J., Ross, N., Siegert, M. J., Smith, A. M., Steinhage, D., Studinger, M., Sun, B., Tinto, B. K., Welch, B. C., Wilson, D., Young, D. A., Xiangbin, C., and Zirizzotti, A.: Bedmap2: improved ice bed, surface and thickness datasets for Antarctica, The Cryosphere, 7, 375-393, https://doi.org/10.5194/tc-7-375-2013, 2013. |
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| Quality: | Model mesh resolution varies but is typically 1km. | |
| Lineage: | Data was modelled using BISICLES, using inputs derived from: the Sentinel-1 velocity maps from satellite feature tracking, performed as part of the RACE project (NE/R012334/1); Bedmap2 (Fretwell et al, 2013) ice thickness & bed elevation. The velocity/stress maps indicate the precursor velocity and stress states prior to the acquisition of seismic and radar datasets, and satellite feature tracking, performed as part of the RACE project (NE/R012334/1). |
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| Temporal Coverage: | |
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| Start Date | 2017-06-30 |
| End Date | 2017-08-01 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -69.5 |
| Northernmost | -65.4 |
| Longitude | |
| Westernmost | -67.1 |
| Easternmost | -58.9 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 1 km - < 10 km or approximately .01 degree - < .09 degree |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Larsen C Ice Shelf |
| Data Collection: | Data was modelled using BISICLES. Inputs derived from the Sentinel-1 velocity maps from satellite feature tracking. Bedmap2 (Fretwell et al, 2013) ice thickness & bed elevation. |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 49 MB |
| Distribution Format | TIFF |
| Fees | N/A |
| Data Storage: | The dataset consists of six model outputs in GeoTIFF format (three each for velocity and stress, showing quantities before and after the calving event, and the difference between the two). In addition to the high-resolution geo-referenced model outputs, a low-resolution image of each is provided for reference. |