Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic
Tabular ground ice bodies are widely spread on Eurasian and North American Arctic plains. Exposed tabular ground ice in coastal bluffs favors the activation of thermal abrasion and thermal denudation, which in turn causes increasing coastal destruction rates. Thermo-denudation under conditions of gr...
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American Geophysical Union
2018
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ftawi:oai:epic.awi.de:48770 2023-05-15T14:27:38+02:00 Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic Kizyakov, Alexander I. Günther, Frank Zimin, Mikhail V. Sonyushkin, Anton V. Wetterich, Sebastian Streletskaya, Irina D. 2018-12-10 https://epic.awi.de/id/eprint/48770/ https://agu.confex.com/agu/fm18/meetingapp.cgi/Paper/409233 https://hdl.handle.net/10013/epic.6c713494-7a19-4451-b89e-d85a69fb6ab3 unknown American Geophysical Union Kizyakov, A. I. , Günther, F. orcid:0000-0001-8298-8937 , Zimin, M. V. , Sonyushkin, A. V. , Wetterich, S. orcid:0000-0001-9234-1192 and Streletskaya, I. D. (2018) Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic , American Geophysical Union Fall Meeting, Washington D.C., USA, 10 December 2018 - 14 December 2018 . hdl:10013/epic.6c713494-7a19-4451-b89e-d85a69fb6ab3 info:eu-repo/semantics/openAccess EPIC3American Geophysical Union Fall Meeting, Washington D.C., USA, 2018-12-10-2018-12-14Washington D.C., American Geophysical Union Conference notRev info:eu-repo/semantics/conferenceObject 2018 ftawi 2021-12-24T15:44:25Z Tabular ground ice bodies are widely spread on Eurasian and North American Arctic plains. Exposed tabular ground ice in coastal bluffs favors the activation of thermal abrasion and thermal denudation, which in turn causes increasing coastal destruction rates. Thermo-denudation under conditions of ground ice exposures includes thawing of ice and frozen sediments along retreating headwalls of retrogressive thaw slumps and their constant enlargement. Thermo-cirques and thermo-terraces are two basic landform types that either feature channelized or broad open outlets, depending on the initial ice body outcrop by the denudation processes inland or in the retreating coastal bluffs. We study key-sites on Kolguev Island (Barents Sea) and on Yugorsky Peninsula (Kara Sea), continuing and extending earlier research efforts on coastal dynamics in the region. New data on thermo-denudation and thermo-abrasion rates for these key-sites have been obtained using a set of multi-temporal satellite images of high and very-high spatial resolution covering the period from 2002 to 2016. For orthorectification purposes of imagery collected prior to TanDEM-X acquisitions, we used an edited version of the 12 m TanDEM-X DEM. Along erosive coastline segments the former relief situation was reconstructed through extrapolation of coastal bluff edge elevation values and restoration of the coastal plain relief towards the sea. On the western coast of Kolguev Island, average coastal bluff retreat rates between 2002 and 2012 varied from 1.7 to 2.4 m/year, while averaged rates of thermo-cirques headwalls retreat were 2.6 m/year. Maximum rates at some sections increased up to 14.5-15.1 m/year in the recent past. High rates of thermo-denudation increase were not only observed on western Kolguev Island, but also on the Yugorsky Peninsula, were rates raised up to 13 m/year in recent years. Activation of thermo-denudation is also noted in other parts of Kara Sea coasts and were generally correlated with changing environmental factors, particularly expressed in an increase on the thaw index during recent years. Conference Object Arctic Arctic Barents Sea Kara Sea Kolguev Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Barents Sea Kara Sea |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Tabular ground ice bodies are widely spread on Eurasian and North American Arctic plains. Exposed tabular ground ice in coastal bluffs favors the activation of thermal abrasion and thermal denudation, which in turn causes increasing coastal destruction rates. Thermo-denudation under conditions of ground ice exposures includes thawing of ice and frozen sediments along retreating headwalls of retrogressive thaw slumps and their constant enlargement. Thermo-cirques and thermo-terraces are two basic landform types that either feature channelized or broad open outlets, depending on the initial ice body outcrop by the denudation processes inland or in the retreating coastal bluffs. We study key-sites on Kolguev Island (Barents Sea) and on Yugorsky Peninsula (Kara Sea), continuing and extending earlier research efforts on coastal dynamics in the region. New data on thermo-denudation and thermo-abrasion rates for these key-sites have been obtained using a set of multi-temporal satellite images of high and very-high spatial resolution covering the period from 2002 to 2016. For orthorectification purposes of imagery collected prior to TanDEM-X acquisitions, we used an edited version of the 12 m TanDEM-X DEM. Along erosive coastline segments the former relief situation was reconstructed through extrapolation of coastal bluff edge elevation values and restoration of the coastal plain relief towards the sea. On the western coast of Kolguev Island, average coastal bluff retreat rates between 2002 and 2012 varied from 1.7 to 2.4 m/year, while averaged rates of thermo-cirques headwalls retreat were 2.6 m/year. Maximum rates at some sections increased up to 14.5-15.1 m/year in the recent past. High rates of thermo-denudation increase were not only observed on western Kolguev Island, but also on the Yugorsky Peninsula, were rates raised up to 13 m/year in recent years. Activation of thermo-denudation is also noted in other parts of Kara Sea coasts and were generally correlated with changing environmental factors, particularly expressed in an increase on the thaw index during recent years. |
format |
Conference Object |
author |
Kizyakov, Alexander I. Günther, Frank Zimin, Mikhail V. Sonyushkin, Anton V. Wetterich, Sebastian Streletskaya, Irina D. |
spellingShingle |
Kizyakov, Alexander I. Günther, Frank Zimin, Mikhail V. Sonyushkin, Anton V. Wetterich, Sebastian Streletskaya, Irina D. Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic |
author_facet |
Kizyakov, Alexander I. Günther, Frank Zimin, Mikhail V. Sonyushkin, Anton V. Wetterich, Sebastian Streletskaya, Irina D. |
author_sort |
Kizyakov, Alexander I. |
title |
Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic |
title_short |
Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic |
title_full |
Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic |
title_fullStr |
Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic |
title_full_unstemmed |
Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic |
title_sort |
rates of coastal destruction in areas of tabular ground ice occurrence in the western russian arctic |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/48770/ https://agu.confex.com/agu/fm18/meetingapp.cgi/Paper/409233 https://hdl.handle.net/10013/epic.6c713494-7a19-4451-b89e-d85a69fb6ab3 |
geographic |
Arctic Barents Sea Kara Sea |
geographic_facet |
Arctic Barents Sea Kara Sea |
genre |
Arctic Arctic Barents Sea Kara Sea Kolguev |
genre_facet |
Arctic Arctic Barents Sea Kara Sea Kolguev |
op_source |
EPIC3American Geophysical Union Fall Meeting, Washington D.C., USA, 2018-12-10-2018-12-14Washington D.C., American Geophysical Union |
op_relation |
Kizyakov, A. I. , Günther, F. orcid:0000-0001-8298-8937 , Zimin, M. V. , Sonyushkin, A. V. , Wetterich, S. orcid:0000-0001-9234-1192 and Streletskaya, I. D. (2018) Rates of coastal destruction in areas of tabular ground ice occurrence in the western Russian Arctic , American Geophysical Union Fall Meeting, Washington D.C., USA, 10 December 2018 - 14 December 2018 . hdl:10013/epic.6c713494-7a19-4451-b89e-d85a69fb6ab3 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766301472727760896 |