Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images, supplement to: Wesche, Christine; Dierking, Wolfgang (2015): Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images. Remote Sensing of Environment, 156, 561-569
The Radarsat-1 Antarctic Mapping Project (RAMP) compiled a mosaic of Antarctica and the adjacent ocean zone from more than 3000 high-resolution Synthetic Aperture Radar (SAR) images acquired in September and October 1997. The mosaic with a pixel size of 100 m was used to determine iceberg size distr...
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ftdatacite:10.1594/pangaea.843280 2023-05-15T14:05:25+02:00 Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images, supplement to: Wesche, Christine; Dierking, Wolfgang (2015): Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images. Remote Sensing of Environment, 156, 561-569 Wesche, Christine Dierking, Wolfgang 2015 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.843280 https://doi.pangaea.de/10.1594/PANGAEA.843280 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.rse.2014.10.025 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY LATITUDE LONGITUDE Area Perimeter Width Length Orientation Dataset dataset Supplementary Dataset 2015 ftdatacite https://doi.org/10.1594/pangaea.843280 https://doi.org/10.1016/j.rse.2014.10.025 2022-02-09T13:17:41Z The Radarsat-1 Antarctic Mapping Project (RAMP) compiled a mosaic of Antarctica and the adjacent ocean zone from more than 3000 high-resolution Synthetic Aperture Radar (SAR) images acquired in September and October 1997. The mosaic with a pixel size of 100 m was used to determine iceberg size distributions around Antarctica, combining an automated detection with a visual control of all icebergs larger than 5 km**2 and correction of recognized false detections. For icebergs below 5 km**2 in size, the numbers of false detections and accuracies of size retrievals were analyzed for three test sites. Nearly 7000 icebergs with horizontal areas between 0.3 and 4717.7 km**2 were identified in a near-coastal zone of varying width between 20 and 300 km. The spatial distributions of icebergs around Antarctica were calculated for zonal segments of 20° angular width and related to the types of the calving fronts in the respective section. Results reveal that regional variations of the size distributions cannot be neglected. The highest ice mass accumulations were found at positions of giant icebergs (> 18.5 km) but also in front of ice shelves from which larger numbers of smaller icebergs calve almost continuously. Although the coastal oceanic zone covered by RAMP is too narrow compared to the spatial coverage needed for oceanographic research, this study nevertheless demonstrates the usefulness of SAR images for iceberg research and the need for repeated data acquisitions extending ocean-wards over distances of 500 km and more from the coast to monitor iceberg melt and disintegration and the related freshwater input into the ocean. Dataset Antarc* Antarctic Antarctica Ice Shelves Iceberg* DataCite Metadata Store (German National Library of Science and Technology) Antarctic |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
LATITUDE LONGITUDE Area Perimeter Width Length Orientation |
spellingShingle |
LATITUDE LONGITUDE Area Perimeter Width Length Orientation Wesche, Christine Dierking, Wolfgang Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images, supplement to: Wesche, Christine; Dierking, Wolfgang (2015): Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images. Remote Sensing of Environment, 156, 561-569 |
topic_facet |
LATITUDE LONGITUDE Area Perimeter Width Length Orientation |
description |
The Radarsat-1 Antarctic Mapping Project (RAMP) compiled a mosaic of Antarctica and the adjacent ocean zone from more than 3000 high-resolution Synthetic Aperture Radar (SAR) images acquired in September and October 1997. The mosaic with a pixel size of 100 m was used to determine iceberg size distributions around Antarctica, combining an automated detection with a visual control of all icebergs larger than 5 km**2 and correction of recognized false detections. For icebergs below 5 km**2 in size, the numbers of false detections and accuracies of size retrievals were analyzed for three test sites. Nearly 7000 icebergs with horizontal areas between 0.3 and 4717.7 km**2 were identified in a near-coastal zone of varying width between 20 and 300 km. The spatial distributions of icebergs around Antarctica were calculated for zonal segments of 20° angular width and related to the types of the calving fronts in the respective section. Results reveal that regional variations of the size distributions cannot be neglected. The highest ice mass accumulations were found at positions of giant icebergs (> 18.5 km) but also in front of ice shelves from which larger numbers of smaller icebergs calve almost continuously. Although the coastal oceanic zone covered by RAMP is too narrow compared to the spatial coverage needed for oceanographic research, this study nevertheless demonstrates the usefulness of SAR images for iceberg research and the need for repeated data acquisitions extending ocean-wards over distances of 500 km and more from the coast to monitor iceberg melt and disintegration and the related freshwater input into the ocean. |
format |
Dataset |
author |
Wesche, Christine Dierking, Wolfgang |
author_facet |
Wesche, Christine Dierking, Wolfgang |
author_sort |
Wesche, Christine |
title |
Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images, supplement to: Wesche, Christine; Dierking, Wolfgang (2015): Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images. Remote Sensing of Environment, 156, 561-569 |
title_short |
Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images, supplement to: Wesche, Christine; Dierking, Wolfgang (2015): Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images. Remote Sensing of Environment, 156, 561-569 |
title_full |
Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images, supplement to: Wesche, Christine; Dierking, Wolfgang (2015): Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images. Remote Sensing of Environment, 156, 561-569 |
title_fullStr |
Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images, supplement to: Wesche, Christine; Dierking, Wolfgang (2015): Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images. Remote Sensing of Environment, 156, 561-569 |
title_full_unstemmed |
Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images, supplement to: Wesche, Christine; Dierking, Wolfgang (2015): Near-coastal circum-Antarctic iceberg size distributions determined from Synthetic Aperture Radar images. Remote Sensing of Environment, 156, 561-569 |
title_sort |
near-coastal circum-antarctic iceberg size distributions determined from synthetic aperture radar images, supplement to: wesche, christine; dierking, wolfgang (2015): near-coastal circum-antarctic iceberg size distributions determined from synthetic aperture radar images. remote sensing of environment, 156, 561-569 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2015 |
url |
https://dx.doi.org/10.1594/pangaea.843280 https://doi.pangaea.de/10.1594/PANGAEA.843280 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Shelves Iceberg* |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelves Iceberg* |
op_relation |
https://dx.doi.org/10.1016/j.rse.2014.10.025 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.843280 https://doi.org/10.1016/j.rse.2014.10.025 |
_version_ |
1766277293277184000 |