Monitoring Inter- and Intra-Seasonal Dynamics of Rapidly Degrading Ice-Rich Permafrost Riverbanks in the Lena Delta with TerraSAR-X Time Series
Arctic warming is leading to substantial changes to permafrost including rapid degradation of ice and ice-rich coasts and riverbanks. In this study, we present and evaluate a high spatiotemporal resolution three-year time series of X-Band microwave satellite data from the TerraSAR-X (TSX) satellite...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5001117 2023-05-15T15:14:24+02:00 Monitoring Inter- and Intra-Seasonal Dynamics of Rapidly Degrading Ice-Rich Permafrost Riverbanks in the Lena Delta with TerraSAR-X Time Series Stettner, S. Beamish, A. Bartsch, A. Heim, B. Grosse, G. Roth, A. Lantuit, H. 2018 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001117 unknown info:eu-repo/semantics/altIdentifier/doi/10.3390/rs10010051 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001117 Remote Sensing info:eu-repo/semantics/article 2018 ftgfzpotsdam https://doi.org/10.3390/rs10010051 2022-09-14T05:57:16Z Arctic warming is leading to substantial changes to permafrost including rapid degradation of ice and ice-rich coasts and riverbanks. In this study, we present and evaluate a high spatiotemporal resolution three-year time series of X-Band microwave satellite data from the TerraSAR-X (TSX) satellite to quantify cliff-top erosion (CTE) of an ice-rich permafrost riverbank in the central Lena Delta. We apply a threshold on TSX backscatter images and automatically extract cliff-top lines to derive intra- and inter-annual CTE. In order to examine the drivers of erosion we statistically compare CTE with climatic baseline data using linear mixed models and analysis of variance (ANOVA). Our evaluation of TSX-derived CTE against annual optical-derived CTE and seasonal in situ measurements showed good agreement between all three datasets. We observed continuous erosion from June to September in 2014 and 2015 with no significant seasonality across the thawing season. We found the highest net annual cliff-top erosion of 6.9 m in 2014, in accordance with above-average mean temperatures and thawing degree days as well as low precipitation. We found high net annual erosion and erosion variability in 2015 associated with moderate mean temperatures but above average precipitation. According to linear mixed models, climate parameters alone could not explain intra-seasonal erosional patterns and additional factors such as ground ice content likely drive the observed erosion. Finally, mean backscatter intensity on the cliff surface decreased from ?5.29 to ?6.69 dB from 2013 to 2015, respectively, likely resulting from changes in surface geometry and properties that could be connected to partial slope stabilization. Overall, we conclude that X-Band backscatter time series can successfully be used to complement optical remote sensing and in situ monitoring of rapid tundra permafrost erosion at riverbanks and coasts by reliably providing information about intra-seasonal dynamics. Article in Journal/Newspaper Arctic Ice lena delta permafrost Tundra GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Arctic Remote Sensing 10 2 51 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
Arctic warming is leading to substantial changes to permafrost including rapid degradation of ice and ice-rich coasts and riverbanks. In this study, we present and evaluate a high spatiotemporal resolution three-year time series of X-Band microwave satellite data from the TerraSAR-X (TSX) satellite to quantify cliff-top erosion (CTE) of an ice-rich permafrost riverbank in the central Lena Delta. We apply a threshold on TSX backscatter images and automatically extract cliff-top lines to derive intra- and inter-annual CTE. In order to examine the drivers of erosion we statistically compare CTE with climatic baseline data using linear mixed models and analysis of variance (ANOVA). Our evaluation of TSX-derived CTE against annual optical-derived CTE and seasonal in situ measurements showed good agreement between all three datasets. We observed continuous erosion from June to September in 2014 and 2015 with no significant seasonality across the thawing season. We found the highest net annual cliff-top erosion of 6.9 m in 2014, in accordance with above-average mean temperatures and thawing degree days as well as low precipitation. We found high net annual erosion and erosion variability in 2015 associated with moderate mean temperatures but above average precipitation. According to linear mixed models, climate parameters alone could not explain intra-seasonal erosional patterns and additional factors such as ground ice content likely drive the observed erosion. Finally, mean backscatter intensity on the cliff surface decreased from ?5.29 to ?6.69 dB from 2013 to 2015, respectively, likely resulting from changes in surface geometry and properties that could be connected to partial slope stabilization. Overall, we conclude that X-Band backscatter time series can successfully be used to complement optical remote sensing and in situ monitoring of rapid tundra permafrost erosion at riverbanks and coasts by reliably providing information about intra-seasonal dynamics. |
format |
Article in Journal/Newspaper |
author |
Stettner, S. Beamish, A. Bartsch, A. Heim, B. Grosse, G. Roth, A. Lantuit, H. |
spellingShingle |
Stettner, S. Beamish, A. Bartsch, A. Heim, B. Grosse, G. Roth, A. Lantuit, H. Monitoring Inter- and Intra-Seasonal Dynamics of Rapidly Degrading Ice-Rich Permafrost Riverbanks in the Lena Delta with TerraSAR-X Time Series |
author_facet |
Stettner, S. Beamish, A. Bartsch, A. Heim, B. Grosse, G. Roth, A. Lantuit, H. |
author_sort |
Stettner, S. |
title |
Monitoring Inter- and Intra-Seasonal Dynamics of Rapidly Degrading Ice-Rich Permafrost Riverbanks in the Lena Delta with TerraSAR-X Time Series |
title_short |
Monitoring Inter- and Intra-Seasonal Dynamics of Rapidly Degrading Ice-Rich Permafrost Riverbanks in the Lena Delta with TerraSAR-X Time Series |
title_full |
Monitoring Inter- and Intra-Seasonal Dynamics of Rapidly Degrading Ice-Rich Permafrost Riverbanks in the Lena Delta with TerraSAR-X Time Series |
title_fullStr |
Monitoring Inter- and Intra-Seasonal Dynamics of Rapidly Degrading Ice-Rich Permafrost Riverbanks in the Lena Delta with TerraSAR-X Time Series |
title_full_unstemmed |
Monitoring Inter- and Intra-Seasonal Dynamics of Rapidly Degrading Ice-Rich Permafrost Riverbanks in the Lena Delta with TerraSAR-X Time Series |
title_sort |
monitoring inter- and intra-seasonal dynamics of rapidly degrading ice-rich permafrost riverbanks in the lena delta with terrasar-x time series |
publishDate |
2018 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001117 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice lena delta permafrost Tundra |
genre_facet |
Arctic Ice lena delta permafrost Tundra |
op_source |
Remote Sensing |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3390/rs10010051 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001117 |
op_doi |
https://doi.org/10.3390/rs10010051 |
container_title |
Remote Sensing |
container_volume |
10 |
container_issue |
2 |
container_start_page |
51 |
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1766344865777451008 |