Sea Tide Influence on Ice Flow of David Drygalski’s Ice Tongue Inferred from Geodetic GNSS Observations and SAR Offset Tracking Analysis
David Glacier and Drygalski Ice Tongue are massive glaciers in Victoria Land, Antarctica. The ice from the East Antarctic Ice Sheet is drained through the former, and then discharged into the western Ross Sea through the latter. David Drygalski is the largest outlet glacier in Northern Victoria Land...
Published in: | Remote Sensing |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://hdl.handle.net/11585/937335 https://doi.org/10.3390/rs15082037 https://www.mdpi.com/2072-4292/15/8/2037 |
id |
ftunibolognairis:oai:cris.unibo.it:11585/937335 |
---|---|
record_format |
openpolar |
spelling |
ftunibolognairis:oai:cris.unibo.it:11585/937335 2024-04-14T08:03:54+00:00 Sea Tide Influence on Ice Flow of David Drygalski’s Ice Tongue Inferred from Geodetic GNSS Observations and SAR Offset Tracking Analysis Vittuari L. Zanutta A. Lugli A. Martelli L. Dubbini M. Vittuari L. Zanutta A. Lugli A. Martelli L. Dubbini M. 2023 ELETTRONICO https://hdl.handle.net/11585/937335 https://doi.org/10.3390/rs15082037 https://www.mdpi.com/2072-4292/15/8/2037 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000977072200001 volume:15 issue:8 firstpage:1 lastpage:20 numberofpages:20 journal:REMOTE SENSING https://hdl.handle.net/11585/937335 doi:10.3390/rs15082037 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85156130883 https://www.mdpi.com/2072-4292/15/8/2037 info:eu-repo/semantics/openAccess Antarctic glaciology kinematic precise point positioning GNSS time serie ice dynamic synthetic aperture radar COSMO-SkyMed info:eu-repo/semantics/article 2023 ftunibolognairis https://doi.org/10.3390/rs15082037 2024-03-21T16:59:58Z David Glacier and Drygalski Ice Tongue are massive glaciers in Victoria Land, Antarctica. The ice from the East Antarctic Ice Sheet is drained through the former, and then discharged into the western Ross Sea through the latter. David Drygalski is the largest outlet glacier in Northern Victoria Land, floating kilometers out to sea. The floating and grounded part of the David Glacier are the main focus of this article. During the XXI Italian Antarctic Expedition (2005-2006), within the framework of the National Antarctic Research Programme (PNRA), two GNSS stations were installed at different points: the first close to the grounding line of David Glacier, and the second approximately 40 km downstream of the first one. Simultaneous data logging was performed by both GNSS stations for 24 days. In the latest data processing, the kinematic PPP technique was adopted to evaluate the dominant diurnal components and the very small semi-diurnal variations in ice motion induced by the ocean tide and the mean ice flow rates of both GNSS stations. Comparison of the GNSS time series with predicted ocean tide calculated from harmonic coefficients of the nearest tide gauge stations, installed at Cape Roberts and Mario Zucchelli Station, highlight different local response of the glacier to ocean tide, with a minor amplitude of vertical motion at a point partially anchored at the bedrock close to the grounding line. During low tide, the velocity of the ice flow reaches its daily maximum, in accordance with the direction of seawater outflow from the fjord into the ocean, while the greatest daily tidal excursion generates an increase in the horizontal ice flow velocity. With the aim to extend the analysis in spatial terms, five COSMO-SkyMED Stripmap scenes were processed. The comparison of the co-registered offset tracking rates, obtained from SAR images, with the GNSS estimation shows good agreement. Article in Journal/Newspaper Antarc* Antarctic Antarctica David Glacier Ice Sheet Ross Sea Victoria Land IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Antarctic Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) David Glacier ENVELOPE(160.000,160.000,-75.333,-75.333) Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Drygalski Ice Tongue ENVELOPE(163.500,163.500,-75.400,-75.400) East Antarctic Ice Sheet Mario Zucchelli ENVELOPE(164.123,164.123,-74.695,-74.695) Mario Zucchelli Station ENVELOPE(164.117,164.117,-74.700,-74.700) Ross Sea Victoria Land Remote Sensing 15 8 2037 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Antarctic glaciology kinematic precise point positioning GNSS time serie ice dynamic synthetic aperture radar COSMO-SkyMed |
spellingShingle |
Antarctic glaciology kinematic precise point positioning GNSS time serie ice dynamic synthetic aperture radar COSMO-SkyMed Vittuari L. Zanutta A. Lugli A. Martelli L. Dubbini M. Sea Tide Influence on Ice Flow of David Drygalski’s Ice Tongue Inferred from Geodetic GNSS Observations and SAR Offset Tracking Analysis |
topic_facet |
Antarctic glaciology kinematic precise point positioning GNSS time serie ice dynamic synthetic aperture radar COSMO-SkyMed |
description |
David Glacier and Drygalski Ice Tongue are massive glaciers in Victoria Land, Antarctica. The ice from the East Antarctic Ice Sheet is drained through the former, and then discharged into the western Ross Sea through the latter. David Drygalski is the largest outlet glacier in Northern Victoria Land, floating kilometers out to sea. The floating and grounded part of the David Glacier are the main focus of this article. During the XXI Italian Antarctic Expedition (2005-2006), within the framework of the National Antarctic Research Programme (PNRA), two GNSS stations were installed at different points: the first close to the grounding line of David Glacier, and the second approximately 40 km downstream of the first one. Simultaneous data logging was performed by both GNSS stations for 24 days. In the latest data processing, the kinematic PPP technique was adopted to evaluate the dominant diurnal components and the very small semi-diurnal variations in ice motion induced by the ocean tide and the mean ice flow rates of both GNSS stations. Comparison of the GNSS time series with predicted ocean tide calculated from harmonic coefficients of the nearest tide gauge stations, installed at Cape Roberts and Mario Zucchelli Station, highlight different local response of the glacier to ocean tide, with a minor amplitude of vertical motion at a point partially anchored at the bedrock close to the grounding line. During low tide, the velocity of the ice flow reaches its daily maximum, in accordance with the direction of seawater outflow from the fjord into the ocean, while the greatest daily tidal excursion generates an increase in the horizontal ice flow velocity. With the aim to extend the analysis in spatial terms, five COSMO-SkyMED Stripmap scenes were processed. The comparison of the co-registered offset tracking rates, obtained from SAR images, with the GNSS estimation shows good agreement. |
author2 |
Vittuari L. Zanutta A. Lugli A. Martelli L. Dubbini M. |
format |
Article in Journal/Newspaper |
author |
Vittuari L. Zanutta A. Lugli A. Martelli L. Dubbini M. |
author_facet |
Vittuari L. Zanutta A. Lugli A. Martelli L. Dubbini M. |
author_sort |
Vittuari L. |
title |
Sea Tide Influence on Ice Flow of David Drygalski’s Ice Tongue Inferred from Geodetic GNSS Observations and SAR Offset Tracking Analysis |
title_short |
Sea Tide Influence on Ice Flow of David Drygalski’s Ice Tongue Inferred from Geodetic GNSS Observations and SAR Offset Tracking Analysis |
title_full |
Sea Tide Influence on Ice Flow of David Drygalski’s Ice Tongue Inferred from Geodetic GNSS Observations and SAR Offset Tracking Analysis |
title_fullStr |
Sea Tide Influence on Ice Flow of David Drygalski’s Ice Tongue Inferred from Geodetic GNSS Observations and SAR Offset Tracking Analysis |
title_full_unstemmed |
Sea Tide Influence on Ice Flow of David Drygalski’s Ice Tongue Inferred from Geodetic GNSS Observations and SAR Offset Tracking Analysis |
title_sort |
sea tide influence on ice flow of david drygalski’s ice tongue inferred from geodetic gnss observations and sar offset tracking analysis |
publishDate |
2023 |
url |
https://hdl.handle.net/11585/937335 https://doi.org/10.3390/rs15082037 https://www.mdpi.com/2072-4292/15/8/2037 |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(160.000,160.000,-75.333,-75.333) ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(163.500,163.500,-75.400,-75.400) ENVELOPE(164.123,164.123,-74.695,-74.695) ENVELOPE(164.117,164.117,-74.700,-74.700) |
geographic |
Antarctic Cape Roberts David Glacier Drygalski Drygalski Ice Tongue East Antarctic Ice Sheet Mario Zucchelli Mario Zucchelli Station Ross Sea Victoria Land |
geographic_facet |
Antarctic Cape Roberts David Glacier Drygalski Drygalski Ice Tongue East Antarctic Ice Sheet Mario Zucchelli Mario Zucchelli Station Ross Sea Victoria Land |
genre |
Antarc* Antarctic Antarctica David Glacier Ice Sheet Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica David Glacier Ice Sheet Ross Sea Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000977072200001 volume:15 issue:8 firstpage:1 lastpage:20 numberofpages:20 journal:REMOTE SENSING https://hdl.handle.net/11585/937335 doi:10.3390/rs15082037 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85156130883 https://www.mdpi.com/2072-4292/15/8/2037 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/rs15082037 |
container_title |
Remote Sensing |
container_volume |
15 |
container_issue |
8 |
container_start_page |
2037 |
_version_ |
1796300213880619008 |