Iceberg and floating sea ice characterisation in the Yung Sund fjord, Greenland,by means of optical and radar data observation
International audience At the Zackenberg site, sea ice starts to move between June and September resulting in icebergs flowing freely on the sea. Splitting into smaller parts, they reduce in size. Icebergs represent a risk for maritime transport and needs to be studied. In order to determine iceberg...
Main Authors: | , , , |
---|---|
Other Authors: | , , , , , , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2017
|
Subjects: | |
Online Access: | https://hal.science/hal-01535487 https://hal.science/hal-01535487/document https://hal.science/hal-01535487/file/Poster-EGU.pdf |
id |
ftunigrenoble:oai:HAL:hal-01535487v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis Statistics and Probability [physics.data-an] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis Statistics and Probability [physics.data-an] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Guillaso, Stephane Gay, Michel Gervaise, Cedric Nahum, Carole Iceberg and floating sea ice characterisation in the Yung Sund fjord, Greenland,by means of optical and radar data observation |
topic_facet |
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis Statistics and Probability [physics.data-an] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience At the Zackenberg site, sea ice starts to move between June and September resulting in icebergs flowing freely on the sea. Splitting into smaller parts, they reduce in size. Icebergs represent a risk for maritime transport and needs to be studied. In order to determine iceberg density per surface unit, size distribution, and movement of icebergs, we need to observe, detect, range and track them. The use of SAR images is particularly well adapted in regions where cloud cover is very present. We focused our study on the Yung Sund fjord in Greenland, where lots of icebergs and sea ice are generated during the summer. In the beginning of July, sea ice breaks up first, followed by icebergs created by the different glaciers based in the ocean. During our investigation, we noticed that the iceberg and sea ice were drifting very fast and thus, we needed to adapt our methodology. To achieve our goal, we collected all remote sensing data available in the region, principally Sentinel 1/2 and LandSAT 8 during one ice free season (from July 1st 2016 to September 30th, 2016). We developed an original approach in order to detect, characterize and track icebergs and sea ice independently from data. The iceberg detection was made using a watershed technique. The advantage of this technique is that it can be applied to both optical and radar images. For the latter, calibrated intensity is transformed into an image using a scaling function, in order to make ice brighter. Land data is masked using a topographic map. When data is segmented, a statistical test derived from the CFAR approach is performed to isolate an iceberg and floating sea ice from the ocean. Finally, a method, such SIFT or BRISK is used to identify and track the different segmented object. These approaches give a representation of the object and make the tracking easier and independent of the scale and rotation, which can occur because icebergs are dependent on ocean currents and wind. Finally, to fill in the gap between acquisition, ... |
author2 |
GIPSA - Signal Images Physique (GIPSA-SIGMAPHY) Département Images et Signal (GIPSA-DIS) Grenoble Images Parole Signal Automatique (GIPSA-lab ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Grenoble Images Parole Signal Automatique (GIPSA-lab ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) GIPSA-Services (GIPSA-Services) DGA |
format |
Conference Object |
author |
Guillaso, Stephane Gay, Michel Gervaise, Cedric Nahum, Carole |
author_facet |
Guillaso, Stephane Gay, Michel Gervaise, Cedric Nahum, Carole |
author_sort |
Guillaso, Stephane |
title |
Iceberg and floating sea ice characterisation in the Yung Sund fjord, Greenland,by means of optical and radar data observation |
title_short |
Iceberg and floating sea ice characterisation in the Yung Sund fjord, Greenland,by means of optical and radar data observation |
title_full |
Iceberg and floating sea ice characterisation in the Yung Sund fjord, Greenland,by means of optical and radar data observation |
title_fullStr |
Iceberg and floating sea ice characterisation in the Yung Sund fjord, Greenland,by means of optical and radar data observation |
title_full_unstemmed |
Iceberg and floating sea ice characterisation in the Yung Sund fjord, Greenland,by means of optical and radar data observation |
title_sort |
iceberg and floating sea ice characterisation in the yung sund fjord, greenland,by means of optical and radar data observation |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-01535487 https://hal.science/hal-01535487/document https://hal.science/hal-01535487/file/Poster-EGU.pdf |
op_coverage |
Vienne, Austria |
long_lat |
ENVELOPE(13.644,13.644,66.207,66.207) |
geographic |
Greenland Sund |
geographic_facet |
Greenland Sund |
genre |
Greenland Sea ice Zackenberg |
genre_facet |
Greenland Sea ice Zackenberg |
op_source |
EGU 2017 - European Geosciences Union General Assembly https://hal.science/hal-01535487 EGU 2017 - European Geosciences Union General Assembly, Apr 2017, Vienne, Austria |
op_relation |
hal-01535487 https://hal.science/hal-01535487 https://hal.science/hal-01535487/document https://hal.science/hal-01535487/file/Poster-EGU.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1798846822851018752 |
spelling |
ftunigrenoble:oai:HAL:hal-01535487v1 2024-05-12T08:04:36+00:00 Iceberg and floating sea ice characterisation in the Yung Sund fjord, Greenland,by means of optical and radar data observation Guillaso, Stephane Gay, Michel Gervaise, Cedric Nahum, Carole GIPSA - Signal Images Physique (GIPSA-SIGMAPHY) Département Images et Signal (GIPSA-DIS) Grenoble Images Parole Signal Automatique (GIPSA-lab ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Grenoble Images Parole Signal Automatique (GIPSA-lab ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) GIPSA-Services (GIPSA-Services) DGA Vienne, Austria 2017-04-23 https://hal.science/hal-01535487 https://hal.science/hal-01535487/document https://hal.science/hal-01535487/file/Poster-EGU.pdf en eng HAL CCSD hal-01535487 https://hal.science/hal-01535487 https://hal.science/hal-01535487/document https://hal.science/hal-01535487/file/Poster-EGU.pdf info:eu-repo/semantics/OpenAccess EGU 2017 - European Geosciences Union General Assembly https://hal.science/hal-01535487 EGU 2017 - European Geosciences Union General Assembly, Apr 2017, Vienne, Austria [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis Statistics and Probability [physics.data-an] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/conferenceObject Conference poster 2017 ftunigrenoble 2024-04-18T04:10:31Z International audience At the Zackenberg site, sea ice starts to move between June and September resulting in icebergs flowing freely on the sea. Splitting into smaller parts, they reduce in size. Icebergs represent a risk for maritime transport and needs to be studied. In order to determine iceberg density per surface unit, size distribution, and movement of icebergs, we need to observe, detect, range and track them. The use of SAR images is particularly well adapted in regions where cloud cover is very present. We focused our study on the Yung Sund fjord in Greenland, where lots of icebergs and sea ice are generated during the summer. In the beginning of July, sea ice breaks up first, followed by icebergs created by the different glaciers based in the ocean. During our investigation, we noticed that the iceberg and sea ice were drifting very fast and thus, we needed to adapt our methodology. To achieve our goal, we collected all remote sensing data available in the region, principally Sentinel 1/2 and LandSAT 8 during one ice free season (from July 1st 2016 to September 30th, 2016). We developed an original approach in order to detect, characterize and track icebergs and sea ice independently from data. The iceberg detection was made using a watershed technique. The advantage of this technique is that it can be applied to both optical and radar images. For the latter, calibrated intensity is transformed into an image using a scaling function, in order to make ice brighter. Land data is masked using a topographic map. When data is segmented, a statistical test derived from the CFAR approach is performed to isolate an iceberg and floating sea ice from the ocean. Finally, a method, such SIFT or BRISK is used to identify and track the different segmented object. These approaches give a representation of the object and make the tracking easier and independent of the scale and rotation, which can occur because icebergs are dependent on ocean currents and wind. Finally, to fill in the gap between acquisition, ... Conference Object Greenland Sea ice Zackenberg Université Grenoble Alpes: HAL Greenland Sund ENVELOPE(13.644,13.644,66.207,66.207) |