Fletcher Ice Rise (78°20′S 81°0′W / 78.333°S 81.000°W), or Fletcher Promontory, is a large ice rise, 100 miles (160 km) long and 40 miles (64 km) wide, at the southwest side of the Ronne Ice Shelf, Antarctica. The feature is completely ice covered and rises between Rutford Ice Stream and Carlson Inlet. The ice rise was observed, photographed and roughly sketched by Lieutenant Ronald F. Carlson, U.S. Navy, in the course of a C-130 aircraft flight of December 14–15, 1961 from McMurdo Sound to this vicinity and returning. It was mapped in detail by the U.S. Geological Survey from Landsat imagery taken 1973–74, and was named by the Advisory Committee on Antarctic Names for Joseph O. Fletcher, director of the Office of Polar Programs, National Science Foundation, 1971–74.[1]
Between 2005 and 2007 extensive ground-based [2] and airborne[3] radar surveys by teams from the British Antarctic Survey (BAS) were carried out, which obtained information about the thickness and internal structure of the ice mass, confirming operation of the Raymond Effect at the ice divide. In 2011-12 further radar surveying was done by Guðfinna 'Tollý' Aðalgeirsdóttir[4] and drilling through the ice was carried out by a BAS-led team.[5] In consequence part of the Fletcher Ice Rise was named the Hindmarsh Dome by the United Kingdom Antarctic Place-Names Committee.[6]
See also
editReferences
edit- ^ "Fletcher Ice Rise". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2009-11-10.
- ^ Hindmarsh, R.C.A.; King, E.C.; Mulvaney, R.; et al. (2011). "Flow at ice-divide triple junctions: 2. Three-dimensional views of isochrone architecture from ice-penetrating radar surveys". Journal of Geophysical Research. 116 (F02024). doi:10.1029/2010JF001785. hdl:20.500.11820/68fe4f33-75c6-4e8f-b511-2201147fde24. S2CID 55008674. Retrieved 19 August 2020.
- ^ Fretwell, P.; Pritchard, H. D.; Vaughan, D. G.; Bamber, J. L.; Barrand, N. E.; et al. (28 February 2013). "Bedmap2: improved ice bed, surface and thickness datasets for Antarctica" (PDF). The Cryosphere. 7 (1): 390. Bibcode:2013TCry....7..375F. doi:10.5194/tc-7-375-2013. Retrieved 6 January 2014.
- ^ Kingslake, J.; Hindmarsh, R.C.A.; Aðalgeirsdóttir, G.; et al. (2014). "Full-depth englacial vertical ice-sheet velocities measured using phase-sensitive radar". Journal of Geophysical Research. 119 (12): 2604–2618. Bibcode:2014JGRF..119.2604K. doi:10.1002/2014JF003275.
- ^ Mulvaney, R.; Triest, J.; Alemany, O. (2014). "The James Ross Island and the Fletcher Promontory ice-core drilling projects". Annals of Glaciology. 55 (68): 179–188. Bibcode:2014AnGla..55..179M. doi:10.3189/2014AoG68A044.
- ^ UK Antarctic Place-names Committee. "2020 Antarctic Place-Names mark 200th Anniversary of the Discovery of Antarctica".
This article incorporates public domain material from "Fletcher Ice Rise". Geographic Names Information System. United States Geological Survey.
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