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Meteorological Origin of the Static Crossover Pattern Present in Low-Resolution-Mode CryoSat-2 Data Over Central Antarctica

Armitage, TWK; Wingham, DJ; Ridout, AL; (2014) Meteorological Origin of the Static Crossover Pattern Present in Low-Resolution-Mode CryoSat-2 Data Over Central Antarctica. IEEE Geoscience and Remote Sensing Letters , 11 (7) pp. 1295-1299. 10.1109/LGRS.2013.2292821.

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Abstract

The most effective way of determining the rate of elevation change of the Earth's large ice sheets using radar altimeters is to examine the difference in the elevation measured on ascending and descending orbits. This crossover difference has a static and time-varying component, and by isolating the time-varying part, one can construct a time series of the ice sheet elevation change. The static component of the crossover difference arises as a result of an anisotropic dependence of the extinction coefficient on the angle between the radar polarization and wind-induced features of the firn. Here, the static crossover difference observed by CryoSat-2 over the Antarctic ice sheet is examined, and a simple model is developed to explain the observed pattern. There is an excellent agreement between the modeled results and the observations, calling into question the results of previous studies of the same phenomenon with different radar altimeters.

Type: Article
Title: Meteorological Origin of the Static Crossover Pattern Present in Low-Resolution-Mode CryoSat-2 Data Over Central Antarctica
DOI: 10.1109/LGRS.2013.2292821
Publisher version: http://dx.doi.org/10.1109/LGRS.2013.2292821
Language: English
Additional information: Copyright © 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Keywords: CryoSat-2, ice sheets, radar altimetry
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1492957
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