Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia
Coastal erosion and flooding transform terrestrial landscapes into marine environments. In the Arctic, these processes inundate terrestrial permafrost with seawater and create submarine permafrost. Permafrost begins to warm under marine conditions, which can destabilize the sea floor and may release...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
COPERNICUS GESELLSCHAFT MBH
2016
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/41973/ https://epic.awi.de/id/eprint/41973/1/overduin2016.pdf https://hdl.handle.net/10013/epic.48811 https://hdl.handle.net/10013/epic.48811.d001 |
id |
ftawi:oai:epic.awi.de:41973 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:41973 2024-09-15T18:11:27+00:00 Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia Overduin, Paul Wetterich, Sebastian Günther, Frank Grigoriev, Mikhail N. Grosse, Guido Schirrmeister, Lutz Hubberten, Hans-Wolfgang Makarov, Aleksandr S. 2016 application/pdf https://epic.awi.de/id/eprint/41973/ https://epic.awi.de/id/eprint/41973/1/overduin2016.pdf https://hdl.handle.net/10013/epic.48811 https://hdl.handle.net/10013/epic.48811.d001 unknown COPERNICUS GESELLSCHAFT MBH https://epic.awi.de/id/eprint/41973/1/overduin2016.pdf https://hdl.handle.net/10013/epic.48811.d001 Overduin, P. orcid:0000-0001-9849-4712 , Wetterich, S. orcid:0000-0001-9234-1192 , Günther, F. orcid:0000-0001-8298-8937 , Grigoriev, M. N. , Grosse, G. orcid:0000-0001-5895-2141 , Schirrmeister, L. orcid:0000-0001-9455-0596 , Hubberten, H. W. and Makarov, A. S. (2016) Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia , Cryosphere, 10 , pp. 1449-1462 . doi:10.5194/tc-10-1449-2016 <https://doi.org/10.5194/tc-10-1449-2016> , hdl:10013/epic.48811 EPIC3Cryosphere, COPERNICUS GESELLSCHAFT MBH, 10, pp. 1449-1462, ISSN: 1994-0416 Article isiRev 2016 ftawi https://doi.org/10.5194/tc-10-1449-2016 2024-06-24T04:15:36Z Coastal erosion and flooding transform terrestrial landscapes into marine environments. In the Arctic, these processes inundate terrestrial permafrost with seawater and create submarine permafrost. Permafrost begins to warm under marine conditions, which can destabilize the sea floor and may release greenhouse gases. We report on the transition of terrestrial to submarine permafrost at a site where the timing of inundation can be inferred from the rate of coastline retreat. On Muostakh Island in the central Laptev Sea, East Siberia, changes in annual coastline position have been measured for decades and vary highly spatially.We hypothesize that these rates are inversely related to the inclination of the upper surface of submarine ice-bonded permafrost (IBP) based on the consequent duration of inundation with increasing distance from the shoreline. We compared rapidly eroding and stable coastal sections of Muostakh Island and find permafrost-table inclinations, determined using direct current resistivity, of 1 and 5 %, respectively. Determinations of submarine IBP depth from a drilling transect in the early 1980s were compared to resistivity profiles from 2011. Based on borehole observations, the thickness of unfrozen sediment overlying the IBP increased from 0 to 14m below sea level with increasing distance from the shoreline. The geoelectrical profiles showed thickening of the unfrozen sediment overlying ice-bonded permafrost over the 28 years since drilling took place. We use geoelectrical estimates of IBP depth to estimate permafrost degradation rates since inundation. Degradation rates decreased from over 0.4m/a following inundation to around 0.1m/a at the latest after 60 to 110 years and remained constant at this level as the duration of inundation increased to 250 years. We suggest that long-term rates are lower than these values, as the depth to the IBP increases and thermal and porewater solute concentration gradients over depth decrease. For the study region, recent increases in coastal erosion rate and ... Article in Journal/Newspaper Ice laptev Laptev Sea permafrost Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) The Cryosphere 10 4 1449 1462 |
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 |
Coastal erosion and flooding transform terrestrial landscapes into marine environments. In the Arctic, these processes inundate terrestrial permafrost with seawater and create submarine permafrost. Permafrost begins to warm under marine conditions, which can destabilize the sea floor and may release greenhouse gases. We report on the transition of terrestrial to submarine permafrost at a site where the timing of inundation can be inferred from the rate of coastline retreat. On Muostakh Island in the central Laptev Sea, East Siberia, changes in annual coastline position have been measured for decades and vary highly spatially.We hypothesize that these rates are inversely related to the inclination of the upper surface of submarine ice-bonded permafrost (IBP) based on the consequent duration of inundation with increasing distance from the shoreline. We compared rapidly eroding and stable coastal sections of Muostakh Island and find permafrost-table inclinations, determined using direct current resistivity, of 1 and 5 %, respectively. Determinations of submarine IBP depth from a drilling transect in the early 1980s were compared to resistivity profiles from 2011. Based on borehole observations, the thickness of unfrozen sediment overlying the IBP increased from 0 to 14m below sea level with increasing distance from the shoreline. The geoelectrical profiles showed thickening of the unfrozen sediment overlying ice-bonded permafrost over the 28 years since drilling took place. We use geoelectrical estimates of IBP depth to estimate permafrost degradation rates since inundation. Degradation rates decreased from over 0.4m/a following inundation to around 0.1m/a at the latest after 60 to 110 years and remained constant at this level as the duration of inundation increased to 250 years. We suggest that long-term rates are lower than these values, as the depth to the IBP increases and thermal and porewater solute concentration gradients over depth decrease. For the study region, recent increases in coastal erosion rate and ... |
format |
Article in Journal/Newspaper |
author |
Overduin, Paul Wetterich, Sebastian Günther, Frank Grigoriev, Mikhail N. Grosse, Guido Schirrmeister, Lutz Hubberten, Hans-Wolfgang Makarov, Aleksandr S. |
spellingShingle |
Overduin, Paul Wetterich, Sebastian Günther, Frank Grigoriev, Mikhail N. Grosse, Guido Schirrmeister, Lutz Hubberten, Hans-Wolfgang Makarov, Aleksandr S. Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia |
author_facet |
Overduin, Paul Wetterich, Sebastian Günther, Frank Grigoriev, Mikhail N. Grosse, Guido Schirrmeister, Lutz Hubberten, Hans-Wolfgang Makarov, Aleksandr S. |
author_sort |
Overduin, Paul |
title |
Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia |
title_short |
Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia |
title_full |
Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia |
title_fullStr |
Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia |
title_full_unstemmed |
Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia |
title_sort |
coastal dynamics and submarine permafrost in shallow water of the central laptev sea, east siberia |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/41973/ https://epic.awi.de/id/eprint/41973/1/overduin2016.pdf https://hdl.handle.net/10013/epic.48811 https://hdl.handle.net/10013/epic.48811.d001 |
genre |
Ice laptev Laptev Sea permafrost Siberia |
genre_facet |
Ice laptev Laptev Sea permafrost Siberia |
op_source |
EPIC3Cryosphere, COPERNICUS GESELLSCHAFT MBH, 10, pp. 1449-1462, ISSN: 1994-0416 |
op_relation |
https://epic.awi.de/id/eprint/41973/1/overduin2016.pdf https://hdl.handle.net/10013/epic.48811.d001 Overduin, P. orcid:0000-0001-9849-4712 , Wetterich, S. orcid:0000-0001-9234-1192 , Günther, F. orcid:0000-0001-8298-8937 , Grigoriev, M. N. , Grosse, G. orcid:0000-0001-5895-2141 , Schirrmeister, L. orcid:0000-0001-9455-0596 , Hubberten, H. W. and Makarov, A. S. (2016) Coastal dynamics and submarine permafrost in shallow water of the central Laptev Sea, East Siberia , Cryosphere, 10 , pp. 1449-1462 . doi:10.5194/tc-10-1449-2016 <https://doi.org/10.5194/tc-10-1449-2016> , hdl:10013/epic.48811 |
op_doi |
https://doi.org/10.5194/tc-10-1449-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
4 |
container_start_page |
1449 |
op_container_end_page |
1462 |
_version_ |
1810449041630167040 |