Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years
It is accepted that the Arctic is warming, and may continue to warm, but the impacts on its coasts are not well documented. Permafrost coasts make up one third of the world’s coasts, though few studies quantify recent changes. Remote sensing allows the detection of patterns in regional coastal dynam...
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ftawi:oai:epic.awi.de:42895 2023-05-15T15:12:11+02:00 Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years Irrgang, Anna Manson, Gavin K. Lantuit, Hugues Overduin, Paul Grosse, Guido Günther, Frank 2016-12-12 application/pdf https://epic.awi.de/id/eprint/42895/ https://epic.awi.de/id/eprint/42895/1/AMIrrgang_AGU_2016_epic.pdf https://hdl.handle.net/10013/epic.49455 https://hdl.handle.net/10013/epic.49455.d001 unknown https://epic.awi.de/id/eprint/42895/1/AMIrrgang_AGU_2016_epic.pdf https://hdl.handle.net/10013/epic.49455.d001 Irrgang, A. orcid:0000-0002-8158-9675 , Manson, G. K. , Lantuit, H. orcid:0000-0003-1497-6760 , Overduin, P. orcid:0000-0001-9849-4712 , Grosse, G. orcid:0000-0001-5895-2141 and Günther, F. orcid:0000-0001-8298-8937 (2016) Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years , American Geophysical Union fall meeting, San Francisco, USA, 12 December 2016 - 16 December 2016 . hdl:10013/epic.49455 EPIC3American Geophysical Union fall meeting, San Francisco, USA, 2016-12-12-2016-12-16 Conference notRev 2016 ftawi 2021-12-24T15:42:19Z It is accepted that the Arctic is warming, and may continue to warm, but the impacts on its coasts are not well documented. Permafrost coasts make up one third of the world’s coasts, though few studies quantify recent changes. Remote sensing allows the detection of patterns in regional coastal dynamics, and provides a quantitative evidence of average coastal change and trends in rates on decadal scales. We investigated a 230 km long coastal stretch along the ice-rich and thus erosion-sensitive Yukon coast in north-western Canada over the time period from 1951 to 2015. Georeferenced aerial photographs from the 1950’s, 1970’s and 1990’s as well as World View and GeoEye satellite imagery from 2011 were used to extract shoreline positions which were analyzed using the Digital Shoreline Analysis System (DSAS) extension for ESRI ArcGIS. To provide better temporal resolution of the shore dynamics over the last 20 years (1996-2015), seven coastal monitoring sites maintained by the Geological Survey of Canada were re-surveyed using real-time kinematic differential GPS. Remote sensing data analyses show that coastal retreat accelerated substantially between the 1990s to 2010s, to an average erosion rate of 1.3 m/a. In contrast, the temporally higher resolution ground survey data indicate that coastal erosion rates among the monitoring sites were stable or even showed a decelerating trend over the last 20 years. However, within the last three years, coastal retreat at three sites increased at an unprecedented rate, locally up to 9 m/a. Ground surveys and observations, with remote sensing data, indicate that the current rate of coastal retreat along the Yukon Coast is higher than at any recorded time. Conference Object Arctic Ice permafrost Yukon Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Canada Yukon |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
It is accepted that the Arctic is warming, and may continue to warm, but the impacts on its coasts are not well documented. Permafrost coasts make up one third of the world’s coasts, though few studies quantify recent changes. Remote sensing allows the detection of patterns in regional coastal dynamics, and provides a quantitative evidence of average coastal change and trends in rates on decadal scales. We investigated a 230 km long coastal stretch along the ice-rich and thus erosion-sensitive Yukon coast in north-western Canada over the time period from 1951 to 2015. Georeferenced aerial photographs from the 1950’s, 1970’s and 1990’s as well as World View and GeoEye satellite imagery from 2011 were used to extract shoreline positions which were analyzed using the Digital Shoreline Analysis System (DSAS) extension for ESRI ArcGIS. To provide better temporal resolution of the shore dynamics over the last 20 years (1996-2015), seven coastal monitoring sites maintained by the Geological Survey of Canada were re-surveyed using real-time kinematic differential GPS. Remote sensing data analyses show that coastal retreat accelerated substantially between the 1990s to 2010s, to an average erosion rate of 1.3 m/a. In contrast, the temporally higher resolution ground survey data indicate that coastal erosion rates among the monitoring sites were stable or even showed a decelerating trend over the last 20 years. However, within the last three years, coastal retreat at three sites increased at an unprecedented rate, locally up to 9 m/a. Ground surveys and observations, with remote sensing data, indicate that the current rate of coastal retreat along the Yukon Coast is higher than at any recorded time. |
format |
Conference Object |
author |
Irrgang, Anna Manson, Gavin K. Lantuit, Hugues Overduin, Paul Grosse, Guido Günther, Frank |
spellingShingle |
Irrgang, Anna Manson, Gavin K. Lantuit, Hugues Overduin, Paul Grosse, Guido Günther, Frank Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years |
author_facet |
Irrgang, Anna Manson, Gavin K. Lantuit, Hugues Overduin, Paul Grosse, Guido Günther, Frank |
author_sort |
Irrgang, Anna |
title |
Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years |
title_short |
Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years |
title_full |
Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years |
title_fullStr |
Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years |
title_full_unstemmed |
Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years |
title_sort |
long term coastal monitoring along the yukon coast indicates acceleration of coastal retreat in the last 20 years |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/42895/ https://epic.awi.de/id/eprint/42895/1/AMIrrgang_AGU_2016_epic.pdf https://hdl.handle.net/10013/epic.49455 https://hdl.handle.net/10013/epic.49455.d001 |
geographic |
Arctic Canada Yukon |
geographic_facet |
Arctic Canada Yukon |
genre |
Arctic Ice permafrost Yukon |
genre_facet |
Arctic Ice permafrost Yukon |
op_source |
EPIC3American Geophysical Union fall meeting, San Francisco, USA, 2016-12-12-2016-12-16 |
op_relation |
https://epic.awi.de/id/eprint/42895/1/AMIrrgang_AGU_2016_epic.pdf https://hdl.handle.net/10013/epic.49455.d001 Irrgang, A. orcid:0000-0002-8158-9675 , Manson, G. K. , Lantuit, H. orcid:0000-0003-1497-6760 , Overduin, P. orcid:0000-0001-9849-4712 , Grosse, G. orcid:0000-0001-5895-2141 and Günther, F. orcid:0000-0001-8298-8937 (2016) Long term coastal monitoring along the Yukon Coast indicates acceleration of coastal retreat in the last 20 years , American Geophysical Union fall meeting, San Francisco, USA, 12 December 2016 - 16 December 2016 . hdl:10013/epic.49455 |
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1766342906586595328 |