Classification of calving fronts around Antarctica
Iceberg calving is the largest loss term in Antarctic mass balance. The iceberg areas vary from a few square meters (growler) to several hundred square kilometres (huge tabular icebergs or ice islands) and their shape (blocky, domed or tabular) depends on the morphology of their calving front. The A...
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ftawi:oai:epic.awi.de:30213 2023-05-15T13:46:52+02:00 Classification of calving fronts around Antarctica Wesche, Christine 2012 application/pdf https://epic.awi.de/id/eprint/30213/ https://epic.awi.de/id/eprint/30213/1/abstract.pdf https://hdl.handle.net/10013/epic.39136 https://hdl.handle.net/10013/epic.39136.d001 unknown https://epic.awi.de/id/eprint/30213/1/abstract.pdf https://hdl.handle.net/10013/epic.39136.d001 Wesche, C. orcid:0000-0002-9786-4010 (2012) Classification of calving fronts around Antarctica , FRISP Workshop, Utö, Schweden, 11 June 2012 - 14 June 2012 . hdl:10013/epic.39136 EPIC3FRISP Workshop, Utö, Schweden, 2012-06-11-2012-06-14 Conference notRev 2012 ftawi 2021-12-24T15:37:38Z Iceberg calving is the largest loss term in Antarctic mass balance. The iceberg areas vary from a few square meters (growler) to several hundred square kilometres (huge tabular icebergs or ice islands) and their shape (blocky, domed or tabular) depends on the morphology of their calving front. The Antarctic coastline has a length of about 18 000km and is characterized by a large spectrum of morphological properties. In contrast to the Greenland ice sheet, Antarctica is surrounded by a variety of large, medium and small sized ice shelves, besides of glacier tongues and parts without offshore floating ice masses. With the aid of synthetic aperture radar (SAR) images all ice shelves and glacier tongues around Antarctica were mapped. The mosaic of the RADARSAT-1 Antarctica Mapping Project (RAMP) Antarctic Mapping Mission 1 (AMM) was used at a 100 m x 100 m image resolution and the ice shelves were extracted by using the grounding line of the MODIS Mosaic of Antarctica (MOA) Project and the RAMP1-AMM coastline. An automated detection of crevasses was used as a first calving front classification. On the basis of the orientation of the crevasses to one another and relative to the calving front, and the distance between them, an estimation of the dominant size of potentially calving icebergs was made. Other parameters (e.g. shape of the calving front itself, pinning points) were used to make a clearer distinction between calving sites. The Antarctic coast is classified into several groups of calving sites e.g. no floating ice offshore (e.g. Mawson Coast), large ice shelf (e.g. Filcher-Ronne-Ice Shelf) or large glacier tongue (e.g. Mertz Glacier). The resulting map of the classified calving fronts around Antarctica and their description will be used to achieve a detailed picture of crevasse formation and propagation within a co-operation with material scientists and ice shelf modelers. Conference Object Antarc* Antarctic Antarctica glacier Greenland Ice Sheet Ice Shelf Ice Shelves Iceberg* Mertz Glacier Ronne Ice Shelf Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic The Antarctic Greenland Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Mawson Coast ENVELOPE(63.000,63.000,-68.000,-68.000) Moa ENVELOPE(15.184,15.184,67.286,67.286) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Iceberg calving is the largest loss term in Antarctic mass balance. The iceberg areas vary from a few square meters (growler) to several hundred square kilometres (huge tabular icebergs or ice islands) and their shape (blocky, domed or tabular) depends on the morphology of their calving front. The Antarctic coastline has a length of about 18 000km and is characterized by a large spectrum of morphological properties. In contrast to the Greenland ice sheet, Antarctica is surrounded by a variety of large, medium and small sized ice shelves, besides of glacier tongues and parts without offshore floating ice masses. With the aid of synthetic aperture radar (SAR) images all ice shelves and glacier tongues around Antarctica were mapped. The mosaic of the RADARSAT-1 Antarctica Mapping Project (RAMP) Antarctic Mapping Mission 1 (AMM) was used at a 100 m x 100 m image resolution and the ice shelves were extracted by using the grounding line of the MODIS Mosaic of Antarctica (MOA) Project and the RAMP1-AMM coastline. An automated detection of crevasses was used as a first calving front classification. On the basis of the orientation of the crevasses to one another and relative to the calving front, and the distance between them, an estimation of the dominant size of potentially calving icebergs was made. Other parameters (e.g. shape of the calving front itself, pinning points) were used to make a clearer distinction between calving sites. The Antarctic coast is classified into several groups of calving sites e.g. no floating ice offshore (e.g. Mawson Coast), large ice shelf (e.g. Filcher-Ronne-Ice Shelf) or large glacier tongue (e.g. Mertz Glacier). The resulting map of the classified calving fronts around Antarctica and their description will be used to achieve a detailed picture of crevasse formation and propagation within a co-operation with material scientists and ice shelf modelers. |
format |
Conference Object |
author |
Wesche, Christine |
spellingShingle |
Wesche, Christine Classification of calving fronts around Antarctica |
author_facet |
Wesche, Christine |
author_sort |
Wesche, Christine |
title |
Classification of calving fronts around Antarctica |
title_short |
Classification of calving fronts around Antarctica |
title_full |
Classification of calving fronts around Antarctica |
title_fullStr |
Classification of calving fronts around Antarctica |
title_full_unstemmed |
Classification of calving fronts around Antarctica |
title_sort |
classification of calving fronts around antarctica |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/30213/ https://epic.awi.de/id/eprint/30213/1/abstract.pdf https://hdl.handle.net/10013/epic.39136 https://hdl.handle.net/10013/epic.39136.d001 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(63.000,63.000,-68.000,-68.000) ENVELOPE(15.184,15.184,67.286,67.286) |
geographic |
Antarctic The Antarctic Greenland Ronne Ice Shelf Mertz Glacier Mawson Coast Moa |
geographic_facet |
Antarctic The Antarctic Greenland Ronne Ice Shelf Mertz Glacier Mawson Coast Moa |
genre |
Antarc* Antarctic Antarctica glacier Greenland Ice Sheet Ice Shelf Ice Shelves Iceberg* Mertz Glacier Ronne Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica glacier Greenland Ice Sheet Ice Shelf Ice Shelves Iceberg* Mertz Glacier Ronne Ice Shelf |
op_source |
EPIC3FRISP Workshop, Utö, Schweden, 2012-06-11-2012-06-14 |
op_relation |
https://epic.awi.de/id/eprint/30213/1/abstract.pdf https://hdl.handle.net/10013/epic.39136.d001 Wesche, C. orcid:0000-0002-9786-4010 (2012) Classification of calving fronts around Antarctica , FRISP Workshop, Utö, Schweden, 11 June 2012 - 14 June 2012 . hdl:10013/epic.39136 |
_version_ |
1766245457028186112 |