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Amery Ice Shelf Grounding Line Datapoints Extraction from Airborne Ice-penetrating Radar - MaRDI portal

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Amery Ice Shelf Grounding Line Datapoints Extraction from Airborne Ice-penetrating Radar

From MaRDI portal



DOI10.5281/zenodo.7648697Zenodo7648697MaRDI QIDQ6697504

Dataset published at Zenodo repository.

Author name not available (Why is that?)

Publication date: 30 March 2023

Copyright license: No records found.



Description

We present a new grounding lineproduct for Amery Ice Shelf - the ice-penetratingradar-derived grounding line points. The 137 grounding line points were identified by 53 survey lines from 2017 to 2020 and classified into three categories. The Class 1 points are extracted bysignificant echo reflection changes between ice-bed and ice-seawater interfaces along survey lines with continuous signal and have the highest accuracy. The Class2 and Class 3 points were derived from survey lines with fuzzy region with lower accuracy. The mean interval of radar-derived points is16.4 km.The best case radar-derived positions (Class 1) and those from satellite data reveals a mean separation of 1.001.16 km. Two products are available: (1) ice thickness data of Amery Ice Shelf from ice-penetrating radar lines; (2) radar-derived grounding line position (137 points). The ice thickness was calculated by ice surface and bottom signal and the unit is m. Theradar-derived grounding line position have six fields, latitude, longitude, id, ice thickness, date(for collecting the radar data) and Class (the category of point).






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