A method of calculating ice-shelf surface velocity using ICE
Details of Research
TitleA method of calculating ice-shelf surface velocity using ICESat altimetryAbstractVery high precision satellite altimeter measurements from the Geoscience Laser Altimeter System onboard NASAÅ› Ice, Cloud and Land Elevation Satellite (ICESat) have allowed a method of feature tracking to be developed for floating ice which relies on recording the movement of large surface undulations. This method is applied to a section of the Ross Ice Shelf downstream of the grounding line of the Beardmore Glacier, Antarctica. The altimetry method has benefits over established optical and interferometric remote sensing techniques due to high pointing accuracy for geo-location, ability to deal with tidal fluctuations and to measure velocity where visible surface features are absent. Initial processing of a single sequence of ICESat tracks gives encouraging results for unidirectional ice flow with correlations between surface profiles in consecutive years exceeding 90% and producing high internal consistency in velocity between independent tracks. Velocities of 331 ± 28 m a -1 near to the grounding line are also consistent with available ground measurements for the area. Copyright 2011 Cambridge University Press.AcknowledgementsICESat data were provided by the National Snow and Ice Data Center (NSIDC) in Boulder, Colorado. ASTER data were provided within the GLIMS project.
TypeArticleCitationMarsh, O. and Rack, W. (2012). A method of calculating ice-shelf surface velocity using ICESat altimetry. Polar Record, 48(1): 25-30 doi:10.1017/S0032247411000362
Antarctica NZ (26th Nov 2018). A method of calculating ice-shelf surface velocity using ICE . In Website Antarctica NZ. Retrieved 25th Jan 2021 04:33, from https://adam.antarcticanz.govt.nz/nodes/view/63645