Journal cover Journal topic
The Cryosphere An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 4.524 IF 4.524
  • IF 5-year value: 5.558 IF 5-year 5.558
  • CiteScore value: 4.84 CiteScore 4.84
  • SNIP value: 1.425 SNIP 1.425
  • SJR value: 3.034 SJR 3.034
  • IPP value: 4.65 IPP 4.65
  • h5-index value: 52 h5-index 52
  • Scimago H index value: 55 Scimago H index 55
Volume 12, issue 4 | Copyright
The Cryosphere, 12, 1551-1562, 2018
https://doi.org/10.5194/tc-12-1551-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 02 May 2018

Research article | 02 May 2018

A new digital elevation model of Antarctica derived from CryoSat-2 altimetry

Thomas Slater1, Andrew Shepherd1, Malcolm McMillan1, Alan Muir2, Lin Gilbert2, Anna E. Hogg1, Hannes Konrad1, and Tommaso Parrinello3 Thomas Slater et al.
  • 1Centre for Polar Observation and Modelling, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
  • 2Centre for Polar Observation and Modelling, University College London, London, WC1E 6BT, UK
  • 3ESA ESRIN, Via Galileo Galilei, 00044 Frascati RM, Italy

Abstract. We present a new digital elevation model (DEM) of the Antarctic ice sheet and ice shelves based on 2.5×108 observations recorded by the CryoSat-2 satellite radar altimeter between July 2010 and July 2016. The DEM is formed from spatio-temporal fits to elevation measurements accumulated within 1, 2, and 5km grid cells, and is posted at the modal resolution of 1km. Altogether, 94% of the grounded ice sheet and 98% of the floating ice shelves are observed, and the remaining grid cells north of 88°S are interpolated using ordinary kriging. The median and root mean square difference between the DEM and 2.3×107 airborne laser altimeter measurements acquired during NASA Operation IceBridge campaigns are −0.30 and 13.50m, respectively. The DEM uncertainty rises in regions of high slope, especially where elevation measurements were acquired in low-resolution mode; taking this into account, we estimate the average accuracy to be 9.5m – a value that is comparable to or better than that of other models derived from satellite radar and laser altimetry.

Publications Copernicus
Download
Short summary
We present a new digital elevation model of Antarctica derived from 6 years of elevation measurements acquired by ESA's CryoSat-2 satellite radar altimeter. We compare our elevation model to an independent set of NASA IceBridge airborne laser altimeter measurements and find the overall accuracy to be 9.5 m – a value comparable to or better than that of other models derived from satellite altimetry. The new CryoSat-2 digital elevation model of Antarctica will be made freely available.
We present a new digital elevation model of Antarctica derived from 6 years of elevation...
Citation
Share