Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska
Permafrost-related processes drive regional landscape dynamics in the Arctic terrestrial system. A better understanding of past periods indicative of permafrost degradation and aggradation is important for predicting the future response of Arctic landscapes to climate change. Here, we used a multi-p...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.845556 2024-09-15T18:02:16+00:00 Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska Lenz, Josefine Grosse, Guido Jones, Benjamin M Walter Anthony, Katey M Bobrov, Anatoly A Wulf, Sabine Wetterich, Sebastian LATITUDE: 66.461390 * LONGITUDE: -164.139440 * DATE/TIME START: 2009-04-22T00:00:00 * DATE/TIME END: 2009-04-22T00:00:00 2015 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.845556 https://doi.org/10.1594/PANGAEA.845556 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.845556 https://doi.org/10.1594/PANGAEA.845556 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Lenz, Josefine; Grosse, Guido; Jones, Benjamin M; Walter Anthony, Katey M; Bobrov, Anatoly A; Wulf, Sabine; Wetterich, Sebastian (2015): Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska. Permafrost and Periglacial Processes, https://doi.org/10.1002/ppp.1848 AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI dataset publication series 2015 ftpangaea https://doi.org/10.1594/PANGAEA.84555610.1002/ppp.1848 2024-07-24T02:31:21Z Permafrost-related processes drive regional landscape dynamics in the Arctic terrestrial system. A better understanding of past periods indicative of permafrost degradation and aggradation is important for predicting the future response of Arctic landscapes to climate change. Here, we used a multi-proxy approach to analyze a ~4 m long sediment core from a drained thermokarst lake basin on the northern Seward Peninsula in western Arctic Alaska (USA). Sedimentological, biogeochemistical, geochronological, micropaleontological (ostracoda, testate amoeba) and tephra analyses were used to determine the long-term environmental Early-Wisconsin to Holocene history preserved in our core for Central Beringia. Yedoma accumulation dominated throughout the Early to Late-Wisconsin but was interrupted by wetland formation from 44.5 to 41.5 ka BP. The latter was terminated by deposition of 1 m of volcanic tephra, most likely originating from the South Killeak Maar eruption at about 42 ka BP. Yedoma deposition continued until 22.5 ka BP and was followed by a depositional hiatus in the sediment core between 22.5 and 0.23 ka BP. We interpret this hiatus as due to intense thermokarst activity in the areas surrounding the site, which served as a sediment source during the Late-Wisconsin to Holocene climate transition. The lake forming the modern basin on the upland initiated around 0.23 ka BP, which drained catastrophically in spring 2005. The present study emphasizes that Arctic lake systems and periglacial landscapes are highly dynamic and permafrost formation as well as degradation in Central Beringia was controlled by regional to global climate patterns and as well as by local disturbances. Other/Unknown Material Climate change permafrost Permafrost and Periglacial Processes Seward Peninsula Thermokarst Alaska Beringia PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-164.139440,-164.139440,66.461390,66.461390) |
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Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI |
spellingShingle |
AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI Lenz, Josefine Grosse, Guido Jones, Benjamin M Walter Anthony, Katey M Bobrov, Anatoly A Wulf, Sabine Wetterich, Sebastian Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska |
topic_facet |
AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI |
description |
Permafrost-related processes drive regional landscape dynamics in the Arctic terrestrial system. A better understanding of past periods indicative of permafrost degradation and aggradation is important for predicting the future response of Arctic landscapes to climate change. Here, we used a multi-proxy approach to analyze a ~4 m long sediment core from a drained thermokarst lake basin on the northern Seward Peninsula in western Arctic Alaska (USA). Sedimentological, biogeochemistical, geochronological, micropaleontological (ostracoda, testate amoeba) and tephra analyses were used to determine the long-term environmental Early-Wisconsin to Holocene history preserved in our core for Central Beringia. Yedoma accumulation dominated throughout the Early to Late-Wisconsin but was interrupted by wetland formation from 44.5 to 41.5 ka BP. The latter was terminated by deposition of 1 m of volcanic tephra, most likely originating from the South Killeak Maar eruption at about 42 ka BP. Yedoma deposition continued until 22.5 ka BP and was followed by a depositional hiatus in the sediment core between 22.5 and 0.23 ka BP. We interpret this hiatus as due to intense thermokarst activity in the areas surrounding the site, which served as a sediment source during the Late-Wisconsin to Holocene climate transition. The lake forming the modern basin on the upland initiated around 0.23 ka BP, which drained catastrophically in spring 2005. The present study emphasizes that Arctic lake systems and periglacial landscapes are highly dynamic and permafrost formation as well as degradation in Central Beringia was controlled by regional to global climate patterns and as well as by local disturbances. |
format |
Other/Unknown Material |
author |
Lenz, Josefine Grosse, Guido Jones, Benjamin M Walter Anthony, Katey M Bobrov, Anatoly A Wulf, Sabine Wetterich, Sebastian |
author_facet |
Lenz, Josefine Grosse, Guido Jones, Benjamin M Walter Anthony, Katey M Bobrov, Anatoly A Wulf, Sabine Wetterich, Sebastian |
author_sort |
Lenz, Josefine |
title |
Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska |
title_short |
Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska |
title_full |
Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska |
title_fullStr |
Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska |
title_full_unstemmed |
Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska |
title_sort |
mid-wisconsin to holocene permafrost and landscape dynamics based on a drained lake basin core from the northern seward peninsula, northwest alaska |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.845556 https://doi.org/10.1594/PANGAEA.845556 |
op_coverage |
LATITUDE: 66.461390 * LONGITUDE: -164.139440 * DATE/TIME START: 2009-04-22T00:00:00 * DATE/TIME END: 2009-04-22T00:00:00 |
long_lat |
ENVELOPE(-164.139440,-164.139440,66.461390,66.461390) |
genre |
Climate change permafrost Permafrost and Periglacial Processes Seward Peninsula Thermokarst Alaska Beringia |
genre_facet |
Climate change permafrost Permafrost and Periglacial Processes Seward Peninsula Thermokarst Alaska Beringia |
op_source |
Supplement to: Lenz, Josefine; Grosse, Guido; Jones, Benjamin M; Walter Anthony, Katey M; Bobrov, Anatoly A; Wulf, Sabine; Wetterich, Sebastian (2015): Mid-Wisconsin to Holocene permafrost and landscape dynamics based on a drained lake basin core from the northern Seward Peninsula, Northwest Alaska. Permafrost and Periglacial Processes, https://doi.org/10.1002/ppp.1848 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.845556 https://doi.org/10.1594/PANGAEA.845556 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.84555610.1002/ppp.1848 |
_version_ |
1810439742455545856 |