SAR imaging of wave dispersion in Antarctic pancake ice and its use in measuring ice thickness

Peter Wadhams, F F Parmiggiani, G de Carolis, D Desiderio, Martin Doble

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36 Citations (Scopus)

Abstract

A synthetic aperture radar (SAR) image of the advancing winter marginal ice zone (MIZ) in the Antarctic, composed of frazil-pancake ice, has been analysed in a new way in order to test the predictions of a recently developed theory of wave dispersion in pancake ice which treats the ice as a viscous layer. In the image, obtained in April 2000, the structure of the wave spectrum in the MIZ and its change from the open-water spectrum are consistent with a pancake layer 24 cm thick. Intensive in situ measurements of the pancake ice in the MIZ 280 km W of the image location were made from FS Polarstern during a period covering the satellite imaging, and also yielded a mean ice thickness of 24 cm. We conclude that this technique gives realistic results for ice thickness, whereas earlier work based on a different dispersion theory (mass loading) tended to over-estimate thickness. After further validation, it is therefore possible that the SAR wave technique can become an accepted method for monitoring ice thickness in pancake icefields.
Original languageEnglish
Pages (from-to)L15305
JournalGEOPHYS RES LETT
Volume31
Issue number15
DOIs
Publication statusPublished - 2004

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Keywords

  • Geosciences, Multidisciplinary
  • ALGORITHM
  • SYNTHETIC-APERTURE RADAR
  • FRAZIL
  • RETRIEVAL
  • INVERSION
  • SPECTRA

Cite this

Wadhams, P., Parmiggiani, F. F., de Carolis, G., Desiderio, D., & Doble, M. (2004). SAR imaging of wave dispersion in Antarctic pancake ice and its use in measuring ice thickness. GEOPHYS RES LETT, 31(15), L15305. https://doi.org/10.1029/2004GL020340