Articles | Volume 18, issue 3
https://doi.org/10.5194/tc-18-1105-2024
https://doi.org/10.5194/tc-18-1105-2024
Research article
 | 
05 Mar 2024
Research article |  | 05 Mar 2024

The complex basal morphology and ice dynamics of the Nansen Ice Shelf, East Antarctica

Christine F. Dow, Derek Mueller, Peter Wray, Drew Friedrichs, Alexander L. Forrest, Jasmin B. McInerney, Jamin Greenbaum, Donald D. Blankenship, Choon Ki Lee, and Won Sang Lee

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Cited articles

Adusumilli, S., Fricker, H. A., Medley, B., Padman, L., and Siegfried, M. R.: Interannual variations in meltwater input to the Southern Ocean from Antarctic ice shelves, Nat. Geosci., 13, 616–620, 2020. 
Alley, K. E., Scambos, T. A., Siegfried, M. R., and Fricker, H. A.: Impacts of warm water on Antarctic ice shelf stability through basal channel formation, Nat. Geosci., 9, 290–293, 2016. 
Alley, K. E., Scambos, T. A., Anderson, R. S., Rajaram, H., Pope, A., and Haran, T. M.: Continent-wide estimates of Antarctic strain rates from Landsat 8-derived velocity grids, J. Glaciol., 64, 321–332, 2018. 
Alley, K. E., Scambos, T. A., Alley, R. B., and Holschuh, N.: Troughs developed in ice-stream shear margins precondition ice shelves for ocean-driven breakup, Science Advances, 5, p.eaax2215, https://doi.org/10.1126/sciadv.aax2215, 2019. 
Baroni, C., Frezzotti, M., Giraudi, C., and Orombelli, G.: Ice flow and surficial velocity inferred from satellite image and air photo analysis of Larsen Ice tongue, Hells Gate and Nansen ice shelves (Northern Victoria Land, Antarctica), Memorie Della Societa'Geologica Italiana, 46, 69–80, 1991. 
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Ice shelves are a key control on Antarctic contribution to sea level rise. We examine the Nansen Ice Shelf in East Antarctica using a combination of field-based and satellite data. We find the basal topography of the ice shelf is highly variable, only partially visible in satellite datasets. We also find that the thinnest region of the ice shelf is altered over time by ice flow rates and ocean melting. These processes can cause fractures to form that eventually result in large calving events.
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