Preprints
https://doi.org/10.5194/tc-2020-180
https://doi.org/10.5194/tc-2020-180
21 Jul 2020
 | 21 Jul 2020
Status: this discussion paper is a preprint. It has been under review for the journal The Cryosphere (TC). The manuscript was not accepted for further review after discussion.

SAR image observations of the A-68 iceberg drift

Ludwin Lopez-Lopez, Flavio Parmiggiani, Miguel Moctezuma-Flores, and Lorenzo Guerrieri

Abstract. A methodology for examining a temporal sequence of Synthetic Aperture Radar (SAR) images as applied to the detection of the A-68 iceberg and its drifting trajectory, is presented. Using an improved image processing scheme, the analysis covers a period of eighteen months and makes use of a set of Sentinel-1 images. A-68 iceberg calved from the Larsen C ice shelf in July 2017 and is one of the largest icebergs observed by remote sensing on record. After the calving, there was only a modest decrease in the area (about 1 %) in the first six months. It has been drifting along the east coast of the Antarctic Peninsula and it is expected to continue its path for more than a decade. It is important to track the huge A-68 iceberg to retrieve information on the physics of iceberg dynamics and for maritime security reasons. Two relevant problems are addressed by the image processing scheme presented here: (a) How to achieve quasi-automatic analysis using a fuzzy logic approach to image contrast enhancement, and (b) Adoption of ferromagnetic concepts to define a stochastic segmentation. The Ising equation is used to model the energy function of the process, and the segmentation is the result of a stochastic minimization.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Ludwin Lopez-Lopez, Flavio Parmiggiani, Miguel Moctezuma-Flores, and Lorenzo Guerrieri
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Ludwin Lopez-Lopez, Flavio Parmiggiani, Miguel Moctezuma-Flores, and Lorenzo Guerrieri
Ludwin Lopez-Lopez, Flavio Parmiggiani, Miguel Moctezuma-Flores, and Lorenzo Guerrieri

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Latest update: 26 May 2024
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Short summary
A methodology for examining a temporal sequence of Synthetic Aperture Radar (SAR) images as applied to the detection of the A-68 iceberg and its drifting trajectory, is presented. Using an improved image processing scheme, the analysis covers a period of eighteen months. A-68 is one of the largest icebergs observed by remote sensing on record. It is expected to continue its path for more than a decade. It is important to track the huge A-68 iceberg to retrieve information on the drift movement.