| Title | RADARSAT Interferometry for Antarctic Grounding-Zone Mapping |
| Download | Downloads
(Preprint) |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Gray, A L; Short, N ; Bindschadler, R; Joughin, I; Padman, L; Vornberger, P; Khananian, A |
| Source | Annals of Glaciology; 34, 2002 p. 269-276, https://doi.org/10.4095/219823  Open Access |
| Year | 2002 |
| Alt Series | Earth Sciences Sector, Contribution Series 20043021 |
| Document | book |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Released | 2002 01 01 |
| Abstract | Satellite radar interferometry (SRI) is used to provide new information on grounding zones in areas of the eastern Ross Ice Shelf and the Filchner Ice Shelf. At the times of the RADARSAT SRI passes,
separated by 24 days, a tidal model predicts a change in vertical displacement of the freely floating ice of greater than 1 m in both areas. The change in vertical position occurs over a 5 - 10 km flexure zone adjacent to the grounding line and would
lead to a relatively high interferometric phase fringe rate. This was observed in some areas and suitable imagery have been used to map the grounding zone position to an estimated accuracy of 1-2 km. Results for the 'ice plain' area upstream of the
Crary Ice Rise are consistent with the tidal model and improve the previous grounding line estimates based on field surveys and SPOT data. The results support the suggestion of increased ice grounding in this area, and show that a sub-ice shelf water
channel around the southern end of the Crary Ice Rise is unlikely. Results for the Filchner Ice Shelf also show that existing maps of the grounding zone can be refined. In particular, we identify a large ice rise close to the mouth of the Bailey Ice
Stream. |
| GEOSCAN ID | 219823 |
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