Semi-automated open water iceberg detection from Landsat applied to Disko Bay, West Greenland
Changes in Greenland's marine-terminating outlet glaciers have led to changes in the flux of icebergs into Greenland's coastal waters, yet icebergs remain a relatively understudied component of the ice-ocean system. We developed a simple iceberg delineation algorithm for Landsat imagery. A...
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Cambridge University Press
2019
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Online Access: | https://doi.org/10.1017/jog.2019.23 https://doaj.org/article/04b5ac93665245e3be5b79b1b1e515c4 |
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ftdoajarticles:oai:doaj.org/article:04b5ac93665245e3be5b79b1b1e515c4 2023-05-15T16:01:03+02:00 Semi-automated open water iceberg detection from Landsat applied to Disko Bay, West Greenland JESSICA SCHEICK ELLYN M. ENDERLIN GORDON HAMILTON 2019-06-01T00:00:00Z https://doi.org/10.1017/jog.2019.23 https://doaj.org/article/04b5ac93665245e3be5b79b1b1e515c4 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143019000236/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.23 0022-1430 1727-5652 https://doaj.org/article/04b5ac93665245e3be5b79b1b1e515c4 Journal of Glaciology, Vol 65, Pp 468-480 (2019) calving icebergs ice-ocean interactions remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2019 ftdoajarticles https://doi.org/10.1017/jog.2019.23 2023-03-12T01:30:57Z Changes in Greenland's marine-terminating outlet glaciers have led to changes in the flux of icebergs into Greenland's coastal waters, yet icebergs remain a relatively understudied component of the ice-ocean system. We developed a simple iceberg delineation algorithm for Landsat imagery. A machine learning-based cloud mask incorporated into the algorithm enables us to extract iceberg size distributions from open water even in partially cloudy scenes. We applied the algorithm to the Landsat archive covering Disko Bay, West Greenland, to derive a time series of iceberg size distributions from 2000–02 and 2013–15. The time series captures a change in iceberg size distributions, which we interpret as a result of changes in the calving regime of the parent glacier, Sermeq Kujalleq (Jakobshavn Isbræ). The change in calving style associated with the disintegration and disappearance of Sermeq Kujalleq's floating ice tongue resulted in the production of more small icebergs. The increased number of small icebergs resulted in increasingly negative power law slopes fit to iceberg size distributions in Disko Bay, suggesting that iceberg size distribution time series provide useful insights into changes in calving dynamics. Article in Journal/Newspaper Disko Bay glacier Greenland Jakobshavn Jakobshavn isbræ Journal of Glaciology Kujalleq Sermeq Kujalleq Directory of Open Access Journals: DOAJ Articles Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) Kujalleq ENVELOPE(-46.037,-46.037,60.719,60.719) Journal of Glaciology 65 251 468 480 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
calving icebergs ice-ocean interactions remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
calving icebergs ice-ocean interactions remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 JESSICA SCHEICK ELLYN M. ENDERLIN GORDON HAMILTON Semi-automated open water iceberg detection from Landsat applied to Disko Bay, West Greenland |
topic_facet |
calving icebergs ice-ocean interactions remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Changes in Greenland's marine-terminating outlet glaciers have led to changes in the flux of icebergs into Greenland's coastal waters, yet icebergs remain a relatively understudied component of the ice-ocean system. We developed a simple iceberg delineation algorithm for Landsat imagery. A machine learning-based cloud mask incorporated into the algorithm enables us to extract iceberg size distributions from open water even in partially cloudy scenes. We applied the algorithm to the Landsat archive covering Disko Bay, West Greenland, to derive a time series of iceberg size distributions from 2000–02 and 2013–15. The time series captures a change in iceberg size distributions, which we interpret as a result of changes in the calving regime of the parent glacier, Sermeq Kujalleq (Jakobshavn Isbræ). The change in calving style associated with the disintegration and disappearance of Sermeq Kujalleq's floating ice tongue resulted in the production of more small icebergs. The increased number of small icebergs resulted in increasingly negative power law slopes fit to iceberg size distributions in Disko Bay, suggesting that iceberg size distribution time series provide useful insights into changes in calving dynamics. |
format |
Article in Journal/Newspaper |
author |
JESSICA SCHEICK ELLYN M. ENDERLIN GORDON HAMILTON |
author_facet |
JESSICA SCHEICK ELLYN M. ENDERLIN GORDON HAMILTON |
author_sort |
JESSICA SCHEICK |
title |
Semi-automated open water iceberg detection from Landsat applied to Disko Bay, West Greenland |
title_short |
Semi-automated open water iceberg detection from Landsat applied to Disko Bay, West Greenland |
title_full |
Semi-automated open water iceberg detection from Landsat applied to Disko Bay, West Greenland |
title_fullStr |
Semi-automated open water iceberg detection from Landsat applied to Disko Bay, West Greenland |
title_full_unstemmed |
Semi-automated open water iceberg detection from Landsat applied to Disko Bay, West Greenland |
title_sort |
semi-automated open water iceberg detection from landsat applied to disko bay, west greenland |
publisher |
Cambridge University Press |
publishDate |
2019 |
url |
https://doi.org/10.1017/jog.2019.23 https://doaj.org/article/04b5ac93665245e3be5b79b1b1e515c4 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) ENVELOPE(-46.037,-46.037,60.719,60.719) |
geographic |
Greenland Jakobshavn Isbræ Kujalleq |
geographic_facet |
Greenland Jakobshavn Isbræ Kujalleq |
genre |
Disko Bay glacier Greenland Jakobshavn Jakobshavn isbræ Journal of Glaciology Kujalleq Sermeq Kujalleq |
genre_facet |
Disko Bay glacier Greenland Jakobshavn Jakobshavn isbræ Journal of Glaciology Kujalleq Sermeq Kujalleq |
op_source |
Journal of Glaciology, Vol 65, Pp 468-480 (2019) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143019000236/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.23 0022-1430 1727-5652 https://doaj.org/article/04b5ac93665245e3be5b79b1b1e515c4 |
op_doi |
https://doi.org/10.1017/jog.2019.23 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
251 |
container_start_page |
468 |
op_container_end_page |
480 |
_version_ |
1766397049313427456 |