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Remote Sens. 2018, 10(1), 42; https://doi.org/10.3390/rs10010042

Ice Velocity Variations of the Polar Record Glacier (East Antarctica) Using a Rotation-Invariant Feature-Tracking Approach

1
Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Luoyu Rd. 129, Wuhan 430079, China
2
Chinese Arctic and Antarctic Administration, State Oceanic Administration, Fuxingmenwai Ave. 1, Beijing 100860, China
*
Author to whom correspondence should be addressed.
Received: 21 September 2017 / Revised: 17 December 2017 / Accepted: 17 December 2017 / Published: 27 December 2017
(This article belongs to the Special Issue Cryospheric Remote Sensing II)
Full-Text   |   PDF [22049 KB, uploaded 27 December 2017]   |  

Abstract

In this study, the ice velocity changes from 2004 to 2015 of the Polar Record Glacier (PRG) in East Antarctica were investigated based on a feature-tracking method using Landsat-7 enhanced thematic mapper plus (ETM+) and Landsat-8 operational land imager (OLI) images. The flow field of the PRG curves make it difficult to generate ice velocities in some areas using the traditional normalized cross-correlation (NCC)-based feature-tracking method. Therefore, a rotation-invariant parameter from scale-invariant feature transform (SIFT) is introduced to build a novel rotation-invariant feature-tracking approach. The validation was performed based on multi-source images and the making earth system data records for use in research environments (MEaSUREs) interferometric synthetic aperture radar (InSAR)-based Antarctica ice velocity map data set. The results indicate that the proposed method is able to measure the ice velocity in more areas and performs as well as the traditional NCC-based feature-tracking method. The sequential ice velocities obtained present the variations in the PRG during this period. Although the maximum ice velocity of the frontal margin of the PRG and the frontal iceberg reached about 900 m/a and 1000 m/a, respectively, the trend from 2004 to 2015 showed no significant change. Under the interaction of the Polar Times Glacier and the Polarforschung Glacier, both the direction and the displacement of the PRG were influenced. This impact also led to higher velocities in the western areas of the PRG than in the eastern areas. In addition, elevation changes and frontal iceberg calving also impacted the ice velocity of the PRG. View Full-Text
Keywords: Polar Record Glacier; ice velocity; feature-tracking; rotation-invariant Polar Record Glacier; ice velocity; feature-tracking; rotation-invariant
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Liu, T.; Niu, M.; Yang, Y. Ice Velocity Variations of the Polar Record Glacier (East Antarctica) Using a Rotation-Invariant Feature-Tracking Approach. Remote Sens. 2018, 10, 42.

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