Error assessment of satellite-derived lead fraction in the Arctic
International audience Leads within consolidated sea ice control heat exchange between the ocean and the atmosphere during winter, thus constituting an important climate parameter. These narrow elongated features occur when sea ice is fracturing under the action of wind and currents, reducing the lo...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2016
|
Subjects: | |
Online Access: | https://hal.univ-grenoble-alpes.fr/hal-03405340 https://hal.univ-grenoble-alpes.fr/hal-03405340/document https://hal.univ-grenoble-alpes.fr/hal-03405340/file/Ivanova2016The_Cryosphere.pdf https://doi.org/10.5194/tc-10-585-2016 |
id |
ftunigrenoble:oai:HAL:hal-03405340v1 |
---|---|
record_format |
openpolar |
spelling |
ftunigrenoble:oai:HAL:hal-03405340v1 2024-05-12T07:59:43+00:00 Error assessment of satellite-derived lead fraction in the Arctic Ivanova, Natalia Rampal, Pierre Bouillon, Sylvain Nansen Environmental and Remote Sensing Center Bergen (NERSC) 2016-03-14 https://hal.univ-grenoble-alpes.fr/hal-03405340 https://hal.univ-grenoble-alpes.fr/hal-03405340/document https://hal.univ-grenoble-alpes.fr/hal-03405340/file/Ivanova2016The_Cryosphere.pdf https://doi.org/10.5194/tc-10-585-2016 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-10-585-2016 hal-03405340 https://hal.univ-grenoble-alpes.fr/hal-03405340 https://hal.univ-grenoble-alpes.fr/hal-03405340/document https://hal.univ-grenoble-alpes.fr/hal-03405340/file/Ivanova2016The_Cryosphere.pdf doi:10.5194/tc-10-585-2016 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.univ-grenoble-alpes.fr/hal-03405340 The Cryosphere, 2016, 10 (2), pp.585 - 595. ⟨10.5194/tc-10-585-2016⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2016 ftunigrenoble https://doi.org/10.5194/tc-10-585-2016 2024-04-18T03:13:27Z International audience Leads within consolidated sea ice control heat exchange between the ocean and the atmosphere during winter, thus constituting an important climate parameter. These narrow elongated features occur when sea ice is fracturing under the action of wind and currents, reducing the local mechanical strength of the ice cover, which in turn impact the sea ice drift pattern. This creates a high demand for a highquality lead fraction (LF) data set for sea ice model evaluation, initialization, and for the assimilation of such data in regional models. In this context, an available LF data set retrieved from satellite passive microwave observations (Advanced Microwave Scanning Radiometer-Earth Observing System, AMSR-E) is of great value, which has been providing pan-Arctic light-and cloud-independent daily coverage since 2002. In this study errors in this data set are quantified using accurate LF estimates retrieved from Synthetic Aperture Radar (SAR) images employing a threshold technique. A consistent overestimation of LF by a factor of 2-4 is found in the AMSR-E LF product. It is shown that a simple adjustment of the upper tie point used in the method to estimate the LF can reduce the pixel-wise error by a factor of 2 on average. Applying such an adjustment to the full data set may thus significantly increase the quality and value of the original data set. Article in Journal/Newspaper Arctic Sea ice The Cryosphere Université Grenoble Alpes: HAL Arctic The Cryosphere 10 2 585 595 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Ivanova, Natalia Rampal, Pierre Bouillon, Sylvain Error assessment of satellite-derived lead fraction in the Arctic |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Leads within consolidated sea ice control heat exchange between the ocean and the atmosphere during winter, thus constituting an important climate parameter. These narrow elongated features occur when sea ice is fracturing under the action of wind and currents, reducing the local mechanical strength of the ice cover, which in turn impact the sea ice drift pattern. This creates a high demand for a highquality lead fraction (LF) data set for sea ice model evaluation, initialization, and for the assimilation of such data in regional models. In this context, an available LF data set retrieved from satellite passive microwave observations (Advanced Microwave Scanning Radiometer-Earth Observing System, AMSR-E) is of great value, which has been providing pan-Arctic light-and cloud-independent daily coverage since 2002. In this study errors in this data set are quantified using accurate LF estimates retrieved from Synthetic Aperture Radar (SAR) images employing a threshold technique. A consistent overestimation of LF by a factor of 2-4 is found in the AMSR-E LF product. It is shown that a simple adjustment of the upper tie point used in the method to estimate the LF can reduce the pixel-wise error by a factor of 2 on average. Applying such an adjustment to the full data set may thus significantly increase the quality and value of the original data set. |
author2 |
Nansen Environmental and Remote Sensing Center Bergen (NERSC) |
format |
Article in Journal/Newspaper |
author |
Ivanova, Natalia Rampal, Pierre Bouillon, Sylvain |
author_facet |
Ivanova, Natalia Rampal, Pierre Bouillon, Sylvain |
author_sort |
Ivanova, Natalia |
title |
Error assessment of satellite-derived lead fraction in the Arctic |
title_short |
Error assessment of satellite-derived lead fraction in the Arctic |
title_full |
Error assessment of satellite-derived lead fraction in the Arctic |
title_fullStr |
Error assessment of satellite-derived lead fraction in the Arctic |
title_full_unstemmed |
Error assessment of satellite-derived lead fraction in the Arctic |
title_sort |
error assessment of satellite-derived lead fraction in the arctic |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.univ-grenoble-alpes.fr/hal-03405340 https://hal.univ-grenoble-alpes.fr/hal-03405340/document https://hal.univ-grenoble-alpes.fr/hal-03405340/file/Ivanova2016The_Cryosphere.pdf https://doi.org/10.5194/tc-10-585-2016 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice The Cryosphere |
genre_facet |
Arctic Sea ice The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.univ-grenoble-alpes.fr/hal-03405340 The Cryosphere, 2016, 10 (2), pp.585 - 595. ⟨10.5194/tc-10-585-2016⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-10-585-2016 hal-03405340 https://hal.univ-grenoble-alpes.fr/hal-03405340 https://hal.univ-grenoble-alpes.fr/hal-03405340/document https://hal.univ-grenoble-alpes.fr/hal-03405340/file/Ivanova2016The_Cryosphere.pdf doi:10.5194/tc-10-585-2016 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-10-585-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
2 |
container_start_page |
585 |
op_container_end_page |
595 |
_version_ |
1798841304218599424 |