A New Approach for Monitoring the Terra Nova Bay Polynya through MODIS Ice Surface Temperature Imagery and Its Validation during 2010 and 2011 Winter Seasons
Polynyas are dynamic stretches of open water surrounded by ice. They typically occur in remote regions of the Arctic and Antarctic, thus remote sensing is essential for monitoring their dynamics. On regional scales, daily passive microwave radiometers provide useful information about their extent be...
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MDPI AG
2018
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Online Access: | https://doi.org/10.3390/rs10030366 https://doaj.org/article/5fcd56a1c8944f1c96ab3e1a21b88691 |
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ftdoajarticles:oai:doaj.org/article:5fcd56a1c8944f1c96ab3e1a21b88691 2023-05-15T13:36:23+02:00 A New Approach for Monitoring the Terra Nova Bay Polynya through MODIS Ice Surface Temperature Imagery and Its Validation during 2010 and 2011 Winter Seasons Giuseppe Aulicino Manuela Sansiviero Stephan Paul Cinzia Cesarano Giannetta Fusco Peter Wadhams Giorgio Budillon 2018-02-01T00:00:00Z https://doi.org/10.3390/rs10030366 https://doaj.org/article/5fcd56a1c8944f1c96ab3e1a21b88691 EN eng MDPI AG http://www.mdpi.com/2072-4292/10/3/366 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs10030366 https://doaj.org/article/5fcd56a1c8944f1c96ab3e1a21b88691 Remote Sensing, Vol 10, Iss 3, p 366 (2018) Terra Nova Bay polynya extent sea ice MODIS thermal infrared imagery katabatic winds Science Q article 2018 ftdoajarticles https://doi.org/10.3390/rs10030366 2022-12-31T16:09:07Z Polynyas are dynamic stretches of open water surrounded by ice. They typically occur in remote regions of the Arctic and Antarctic, thus remote sensing is essential for monitoring their dynamics. On regional scales, daily passive microwave radiometers provide useful information about their extent because of their independence from cloud coverage and daylight; nonetheless, their coarse resolution often does not allow an accurate discrimination between sea ice and open water. Despite its sensitivity to the presence of clouds, thermal infrared (TIR) Moderate Resolution Imaging Spectroradiometer (MODIS) provides higher-resolution information (typically 1 km) at large swath widths, several times per day, proving to be useful for the retrieval of the size of polynyas. In this study, we deal with Aqua satellite MODIS observations of a frequently occurring coastal polynya in the Terra Nova Bay (TNB), Ross Sea (Antarctica). The potential of a new methodology for estimating the variability of this polynya through MODIS TIR during the 2010 and 2011 freezing season (April to October) is presented and discussed. The polynya is observed in more than 1600 radiance scenes, after a preliminary filter evaluates and discards cloudy and fog-contaminated scenes. This reduces the useful MODIS swaths to about 50% of the available acquisitions, but a revisit time of less than 24 h is kept for about 90% of the study period. As expected, results show a high interannual variability with an opening/closing fluctuation clearly depending on the regime of the katabatic winds recorded by the automatic weather stations Rita and Eneide along the TNB coast. Retrievals are also validated through a comparison with a set of 196 co-located high-resolution ENVISAT ASAR images. Although our estimations slightly underestimate the ASAR derived extents, a good agreement is found, the linear correlation reaching 0.75 and the average relative error being about 6%. Finally, a sensitivity test on the applied thermal thresholds supports the effectiveness of ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Ross Sea Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Antarctic Ross Sea Terra Nova Bay Asar ENVELOPE(134.033,134.033,68.667,68.667) Eneide ENVELOPE(164.100,164.100,-74.693,-74.693) Remote Sensing 10 3 366 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Terra Nova Bay polynya extent sea ice MODIS thermal infrared imagery katabatic winds Science Q |
spellingShingle |
Terra Nova Bay polynya extent sea ice MODIS thermal infrared imagery katabatic winds Science Q Giuseppe Aulicino Manuela Sansiviero Stephan Paul Cinzia Cesarano Giannetta Fusco Peter Wadhams Giorgio Budillon A New Approach for Monitoring the Terra Nova Bay Polynya through MODIS Ice Surface Temperature Imagery and Its Validation during 2010 and 2011 Winter Seasons |
topic_facet |
Terra Nova Bay polynya extent sea ice MODIS thermal infrared imagery katabatic winds Science Q |
description |
Polynyas are dynamic stretches of open water surrounded by ice. They typically occur in remote regions of the Arctic and Antarctic, thus remote sensing is essential for monitoring their dynamics. On regional scales, daily passive microwave radiometers provide useful information about their extent because of their independence from cloud coverage and daylight; nonetheless, their coarse resolution often does not allow an accurate discrimination between sea ice and open water. Despite its sensitivity to the presence of clouds, thermal infrared (TIR) Moderate Resolution Imaging Spectroradiometer (MODIS) provides higher-resolution information (typically 1 km) at large swath widths, several times per day, proving to be useful for the retrieval of the size of polynyas. In this study, we deal with Aqua satellite MODIS observations of a frequently occurring coastal polynya in the Terra Nova Bay (TNB), Ross Sea (Antarctica). The potential of a new methodology for estimating the variability of this polynya through MODIS TIR during the 2010 and 2011 freezing season (April to October) is presented and discussed. The polynya is observed in more than 1600 radiance scenes, after a preliminary filter evaluates and discards cloudy and fog-contaminated scenes. This reduces the useful MODIS swaths to about 50% of the available acquisitions, but a revisit time of less than 24 h is kept for about 90% of the study period. As expected, results show a high interannual variability with an opening/closing fluctuation clearly depending on the regime of the katabatic winds recorded by the automatic weather stations Rita and Eneide along the TNB coast. Retrievals are also validated through a comparison with a set of 196 co-located high-resolution ENVISAT ASAR images. Although our estimations slightly underestimate the ASAR derived extents, a good agreement is found, the linear correlation reaching 0.75 and the average relative error being about 6%. Finally, a sensitivity test on the applied thermal thresholds supports the effectiveness of ... |
format |
Article in Journal/Newspaper |
author |
Giuseppe Aulicino Manuela Sansiviero Stephan Paul Cinzia Cesarano Giannetta Fusco Peter Wadhams Giorgio Budillon |
author_facet |
Giuseppe Aulicino Manuela Sansiviero Stephan Paul Cinzia Cesarano Giannetta Fusco Peter Wadhams Giorgio Budillon |
author_sort |
Giuseppe Aulicino |
title |
A New Approach for Monitoring the Terra Nova Bay Polynya through MODIS Ice Surface Temperature Imagery and Its Validation during 2010 and 2011 Winter Seasons |
title_short |
A New Approach for Monitoring the Terra Nova Bay Polynya through MODIS Ice Surface Temperature Imagery and Its Validation during 2010 and 2011 Winter Seasons |
title_full |
A New Approach for Monitoring the Terra Nova Bay Polynya through MODIS Ice Surface Temperature Imagery and Its Validation during 2010 and 2011 Winter Seasons |
title_fullStr |
A New Approach for Monitoring the Terra Nova Bay Polynya through MODIS Ice Surface Temperature Imagery and Its Validation during 2010 and 2011 Winter Seasons |
title_full_unstemmed |
A New Approach for Monitoring the Terra Nova Bay Polynya through MODIS Ice Surface Temperature Imagery and Its Validation during 2010 and 2011 Winter Seasons |
title_sort |
new approach for monitoring the terra nova bay polynya through modis ice surface temperature imagery and its validation during 2010 and 2011 winter seasons |
publisher |
MDPI AG |
publishDate |
2018 |
url |
https://doi.org/10.3390/rs10030366 https://doaj.org/article/5fcd56a1c8944f1c96ab3e1a21b88691 |
long_lat |
ENVELOPE(134.033,134.033,68.667,68.667) ENVELOPE(164.100,164.100,-74.693,-74.693) |
geographic |
Arctic Antarctic Ross Sea Terra Nova Bay Asar Eneide |
geographic_facet |
Arctic Antarctic Ross Sea Terra Nova Bay Asar Eneide |
genre |
Antarc* Antarctic Antarctica Arctic Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Arctic Ross Sea Sea ice |
op_source |
Remote Sensing, Vol 10, Iss 3, p 366 (2018) |
op_relation |
http://www.mdpi.com/2072-4292/10/3/366 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs10030366 https://doaj.org/article/5fcd56a1c8944f1c96ab3e1a21b88691 |
op_doi |
https://doi.org/10.3390/rs10030366 |
container_title |
Remote Sensing |
container_volume |
10 |
container_issue |
3 |
container_start_page |
366 |
_version_ |
1766077727056592896 |