Filchner/Ronne Ice Shelf (FRISP)
Data Acquisition Method
Excerpts taken from Vaughn and Jonas, 1996 (see Related Publications).
The published data shown in the table (92 points)(Table 1, Vaughan and Jonas, 1996) have been collected by a variety of techniques from celestial observations and resection surveying, through satellite survey using both Transit and GPS systems, to comparison of satellite imagery of ice fronts. The measurements are of varying precision and reliability, but as the overall distribution of measurements is sparse, these data are all still valuable.
Satellite derived velocities:
As a component of the ESAMCA program BAS and IfAG have undertaken mapping of the surface features of FRIS from satellite imagery. Two independent satellite image mosaics have been prepared, one of Landsat MSS data mostly acquired in 1986 and previously discussed by Swithinbank et al. (1988) and the second of ERS-1 SAR imagery acquired between 1992 and 1994.
The Landsat MSS mosaic was georeferenced using measured ground control points (Sievers et al., 1989). Control is thus poorest in the central region of the ice shelf, where errors may be as much as 125m. The SAR mosaic was geo-referenced with respect to the scene corner coordinates based on orbital parameters (supplied by ESA) and thought to be accurate to 50 m (Roth et al., 1993). Control for this mosaic is thus more even. During mosaicing the both sets of images were resampled to 100 m. Given the temporal separation of seven years, the displacement of long-lived surface features between the mosaics is easily measurable. Comparison of the position of features within these mosaics has so far yielded around 228 measurements of velocity. Combining the georeferencing errors and assuming a possible mis-identification of features to 2 pixels (200 m) suggests a total uncertainty in matching features of around of 250 m implying an uncertainty in measured velocity of around 36 m/a. This figure agrees with the apparent displacement of ice surface features in areas that are assumed to be relatively stagnant.
Data Set Information and Access
Data Set Source: (also see: Related Publications)
Vaughan, D.G., and M. Jonas, 1996. Measurements of velocity of Filchner-Ronne Ice Shelf. Filchner-Ronne Ice Shelf Programme (FRISP) Report No. 10. Ed. H Oerter. Pub. AWI, Bremerhaven. 111-116.
Additional Sources: (also see: Related Publications)
Crabtree, R.D and C.S.M. Doake, 1980. Flowlines on Antarctic Ice Shelves. Pol. Rec., 20, No. 124, 31-37.
Doake, C.S.M., 1985. Glaciological evidence: Antarctic Peninsula, Weddell Sea. In. Glacier, Ice Sheets, and sea level: Effect of a CO2 Induced Climate Change. US dept. Of Energy Report, DOE/EV/60235-1, 197-209.
Gerdau, H.W. and H.W. Schenke, 1984. Doppler Satellite observations of point drift rates for German research stations in the Antarctic. Zeitschrift fur Vermessungswesen, 109, (4S) 161-175.
Hinze, H, 1990. Zum Einsatz von Statelliten-Positionierungsverfahren fur glaziologische Aufgaven in der Antarktis. Thesis Doktor-Ingenieur. Hanover, Germany. p.166.
Hutchinson, M.F., 1993. Development of a continent-wide DEM with applications to terrain and climate analysis. In. M.F. Hutchinson et al. (Eds). Environmental Modeling with GIS. New York, Oxford University Press.
Jacobs, S.S., H.H. Helmer, C.S.M. Doake, A. Jenkins, and R.M. Frolich, 1992. Melting of ice shelves and the mass balance of Antarctica. J. Glaciol., 38 (130), 375-387.
Jenkins, A. and C.S.M. Doake, 1991. Ice-Ocean interaction on Ronne Ice Shelf. J. Geophys. Res., 96 (C1), 791-813.
Lange, M.A., 1985. Variation of the ice edge postion in the eastern and southern Weddell Sea. Filchner-Ronne Ice Shelf Programme (FRISP) Report No. 2, 26-31.
Lange, M.A. and H. Kohnen, 1985. Ice front fluctuations in the eastern and southern Weddell Sea. Ann. Glaciol., 6, 187-191.
Lange, M.A., 1987. Quantitative estimates of the mass flux and ice movement along the ice edges in the eastern and southern Weddell Sea. In: C.J. van der Veen and J. Oerlemans (Eds) Dynamics of the West Antarctic Ice Sheet. Reidel Publishing, Dortrecht, Holland. 57-74.
Morris, E.M., 1995. Deployment of reflectors for SAR interferometry-Sledge India field report. BAS report No. R/1994/S6.
Moller, D., B. Reidel and B. Ritter, 1992. Strain and velocity dertermination on Ronne Ice Shelf. Filchner-Ronne Ice Shelf Programme (FRISP) Report No. 6, 61-68.
Reidel, B., A. Karsten, B. Ritter and W. Niemeier, 1995. Geodetic fieldwork along Foundation Ice Stream. Filchner-Ronne Ice Shelf Programme (FRISP) Report No. 9, 101-105.
Roth, A., T. Hugel, M. Matschke and G. Schreier, 1993. Experiences with ERS-1 SAR compositional accuracy. IEEE Trans. Geosci. Rem. Sens. International Geoscience and Remote Sensing Symposium, August 1993. Tokyo Japan, Proc. 3, 1450-1452.
Sievers, J., A. Grindel and W. Meier, 1989. Digital satellite image mapping of Antarctica. Polarforschung, 59, 23-33.
Smith, A.S, 1986. Ice rumples on Ronne Ice Shelf. Br. Antarct. Surv. Bull., 72, 47-52.
Swithinbank, C.M.W., K. Brunk and J. Sievers, 1988. A Glaciological map of Filchner-Ronne Ice Shelf, Antarctica. Ann. Glaciol., 11, 150-155.
Vaughan, D.G., 1994. Glacier geophysical fieldwork on Ronne Icee Shelf in 1992/93. Filchner-Ronne Ice Shelf Programme (FRISP) Report No. 7, 37-39.
Vaughan, D.G., J. Sievers, C.S.M. Doake, H. Hinze, D.R. Mantripp, H. Sandhager, H.W. Schenke, A. Solheim and F. Thyssen, 1995. Subglacial and seabed topography, ice thickness and water column thickness int the vicintiy of Filchner-Ronne-Schelfeis, Antarctica. Polarforschung, 62(2), 75-88.