Ice Speed Variation Driven by Tidal Currents near the Terminus of Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry
The time-varying ice velocity field near the terminus of Jakobshavn Isbræ, Greenland was observed with a terrestrial radar interferometer (TRI) in three summer campaigns in 2012, 2015 and 2016. Analysis of the velocity field and its response to ocean tides suggests a narrow (up to 1 km) floating ton...
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Digital Commons @ University of South Florida
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ftusouthflorida:oai:digitalcommons.usf.edu:geo_facpub-3049 2023-07-30T04:03:37+02:00 Ice Speed Variation Driven by Tidal Currents near the Terminus of Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry Xie, Surui Dixon, Timothy H. Voytenko, Denis Deng, Fanghui Holland, David M. 2017-12-12T08:00:00Z https://digitalcommons.usf.edu/geo_facpub/2059 https://agu.confex.com/agu/fm17/meetingapp.cgi/Paper/241301 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/geo_facpub/2059 https://agu.confex.com/agu/fm17/meetingapp.cgi/Paper/241301 School of Geosciences Faculty and Staff Publications Earth Sciences presentation 2017 ftusouthflorida 2023-07-13T20:45:47Z The time-varying ice velocity field near the terminus of Jakobshavn Isbræ, Greenland was observed with a terrestrial radar interferometer (TRI) in three summer campaigns in 2012, 2015 and 2016. Analysis of the velocity field and its response to ocean tides suggests a narrow (up to 1 km) floating tongue in early June of 2015/2016, but no evidence of floating tongue by early August 2012. There is significant periodic glacier motion seen by the TRI in the terminal region that is forced by ocean tides. A simple model for the seasonal evolution of the terminal region includes loss of the floating tongue during the summer months, driven by calving and terminus undercutting from warm ocean water. Motion of the iceberg mélange in front of the calving face includes motion induced by tide rise and fall, as well as horizontal motion that may reflect tidally driven currents, or perhaps meltwater events that have a diurnal component. Conference Object glacier Greenland Jakobshavn Jakobshavn isbræ University of South Florida St. Petersburg: Digital USFSP Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Xie, Surui Dixon, Timothy H. Voytenko, Denis Deng, Fanghui Holland, David M. Ice Speed Variation Driven by Tidal Currents near the Terminus of Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry |
topic_facet |
Earth Sciences |
description |
The time-varying ice velocity field near the terminus of Jakobshavn Isbræ, Greenland was observed with a terrestrial radar interferometer (TRI) in three summer campaigns in 2012, 2015 and 2016. Analysis of the velocity field and its response to ocean tides suggests a narrow (up to 1 km) floating tongue in early June of 2015/2016, but no evidence of floating tongue by early August 2012. There is significant periodic glacier motion seen by the TRI in the terminal region that is forced by ocean tides. A simple model for the seasonal evolution of the terminal region includes loss of the floating tongue during the summer months, driven by calving and terminus undercutting from warm ocean water. Motion of the iceberg mélange in front of the calving face includes motion induced by tide rise and fall, as well as horizontal motion that may reflect tidally driven currents, or perhaps meltwater events that have a diurnal component. |
format |
Conference Object |
author |
Xie, Surui Dixon, Timothy H. Voytenko, Denis Deng, Fanghui Holland, David M. |
author_facet |
Xie, Surui Dixon, Timothy H. Voytenko, Denis Deng, Fanghui Holland, David M. |
author_sort |
Xie, Surui |
title |
Ice Speed Variation Driven by Tidal Currents near the Terminus of Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry |
title_short |
Ice Speed Variation Driven by Tidal Currents near the Terminus of Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry |
title_full |
Ice Speed Variation Driven by Tidal Currents near the Terminus of Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry |
title_fullStr |
Ice Speed Variation Driven by Tidal Currents near the Terminus of Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry |
title_full_unstemmed |
Ice Speed Variation Driven by Tidal Currents near the Terminus of Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry |
title_sort |
ice speed variation driven by tidal currents near the terminus of jakobshavn isbræ, greenland, observed with terrestrial radar interferometry |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2017 |
url |
https://digitalcommons.usf.edu/geo_facpub/2059 https://agu.confex.com/agu/fm17/meetingapp.cgi/Paper/241301 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Greenland Jakobshavn Isbræ |
geographic_facet |
Greenland Jakobshavn Isbræ |
genre |
glacier Greenland Jakobshavn Jakobshavn isbræ |
genre_facet |
glacier Greenland Jakobshavn Jakobshavn isbræ |
op_source |
School of Geosciences Faculty and Staff Publications |
op_relation |
https://digitalcommons.usf.edu/geo_facpub/2059 https://agu.confex.com/agu/fm17/meetingapp.cgi/Paper/241301 |
_version_ |
1772814653662953472 |