Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada)
Ice-wedge polygon (IWP) peatlands in the Arctic and Subarctic are extremely vulnerable to climatic and environmental change. We present the results of a multidisciplinary paleoenvironmental study on IWPs in the northern Yukon, Canada. High-resolution laboratory analyses were carried out on a permafr...
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ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:26510 2023-05-15T15:16:11+02:00 Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada) Fritz, Michael Wolter, Juliane Rudaya, Natalia Palagushkina, Olga Nazarova, Larisa Obu, Jaroslav Rethemeyer, Janet Lantuit, Hugues Wetterich, Sebastian 2016 https://kups.ub.uni-koeln.de/26510/ eng eng PERGAMON-ELSEVIER SCIENCE LTD Fritz, Michael orcid:0000-0003-4591-7325 , Wolter, Juliane orcid:0000-0001-6179-7621 , Rudaya, Natalia orcid:0000-0003-1536-6470 , Palagushkina, Olga orcid:0000-0002-8131-0216 , Nazarova, Larisa, Obu, Jaroslav orcid:0000-0002-8172-2536 , Rethemeyer, Janet, Lantuit, Hugues orcid:0000-0003-1497-6760 and Wetterich, Sebastian (2016). Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada). Quat. Sci. Rev., 147. S. 279 - 298. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0277-3791 ddc:no doc-type:article publishedVersion 2016 ftubkoeln 2022-11-09T07:20:45Z Ice-wedge polygon (IWP) peatlands in the Arctic and Subarctic are extremely vulnerable to climatic and environmental change. We present the results of a multidisciplinary paleoenvironmental study on IWPs in the northern Yukon, Canada. High-resolution laboratory analyses were carried out on a permafrost core and the overlying seasonally thawed (active) layer, from an IWP located in a drained lake basin on Herschel Island. In relation to 14 Accelerator Mass Spectrometry (AMS) radiocarbon dates spanning the last 5000 years, we report sedimentary data including grain size distribution and biogeochemical parameters (organic carbon, nitrogen, C/N ratio, delta C-13), stable water isotopes (delta O-18, delta D), as well as fossil pollen, plant macrofossil and diatom assemblages. Three sediment units (SUS) correspond to the main stages of deposition (1) in a thermokarst lake (SW : 4950 to 3950 cal yrs BP), (2) during transition from lacustrine to palustrine conditions after lake drainage (SU2: 3950 to 3120 cal yrs BP), and (3) in palustrine conditions of the IWP field that developed after drainage (SU3: 3120 cal yrs BP to 2012 CE). The lacustrine phase (pre 3950 cal yrs BP) is characterized by planktonic-benthic and pioneer diatom species indicating circumneutral waters, and very few plant macrofossils. The pollen record has captured a regional signal of relatively stable vegetation composition and climate for the lacustrine stage of the record until 3950 cal yrs BP. Palustrine conditions with benthic and acidophilic diatom species characterize the peaty shallow-water environments of the low-centered IWP. The transition from lacustrine to palustrine conditions was accompanied by acidification and rapid revegetation of the lake bottom within about 100 years. Since the palustrine phase we consider the pollen record as a local vegetation proxy dominated by the plant communities growing in the IWP. Ice-wedge cracking in water-saturated sediments started immediately after lake drainage at about 3950 cal yrs BP and led to the ... Article in Journal/Newspaper Arctic Herschel Herschel Island Ice permafrost Subarctic Thermokarst wedge* Yukon Cologne University: KUPS Arctic Canada Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Yukon |
institution |
Open Polar |
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Cologne University: KUPS |
op_collection_id |
ftubkoeln |
language |
English |
topic |
ddc:no |
spellingShingle |
ddc:no Fritz, Michael Wolter, Juliane Rudaya, Natalia Palagushkina, Olga Nazarova, Larisa Obu, Jaroslav Rethemeyer, Janet Lantuit, Hugues Wetterich, Sebastian Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada) |
topic_facet |
ddc:no |
description |
Ice-wedge polygon (IWP) peatlands in the Arctic and Subarctic are extremely vulnerable to climatic and environmental change. We present the results of a multidisciplinary paleoenvironmental study on IWPs in the northern Yukon, Canada. High-resolution laboratory analyses were carried out on a permafrost core and the overlying seasonally thawed (active) layer, from an IWP located in a drained lake basin on Herschel Island. In relation to 14 Accelerator Mass Spectrometry (AMS) radiocarbon dates spanning the last 5000 years, we report sedimentary data including grain size distribution and biogeochemical parameters (organic carbon, nitrogen, C/N ratio, delta C-13), stable water isotopes (delta O-18, delta D), as well as fossil pollen, plant macrofossil and diatom assemblages. Three sediment units (SUS) correspond to the main stages of deposition (1) in a thermokarst lake (SW : 4950 to 3950 cal yrs BP), (2) during transition from lacustrine to palustrine conditions after lake drainage (SU2: 3950 to 3120 cal yrs BP), and (3) in palustrine conditions of the IWP field that developed after drainage (SU3: 3120 cal yrs BP to 2012 CE). The lacustrine phase (pre 3950 cal yrs BP) is characterized by planktonic-benthic and pioneer diatom species indicating circumneutral waters, and very few plant macrofossils. The pollen record has captured a regional signal of relatively stable vegetation composition and climate for the lacustrine stage of the record until 3950 cal yrs BP. Palustrine conditions with benthic and acidophilic diatom species characterize the peaty shallow-water environments of the low-centered IWP. The transition from lacustrine to palustrine conditions was accompanied by acidification and rapid revegetation of the lake bottom within about 100 years. Since the palustrine phase we consider the pollen record as a local vegetation proxy dominated by the plant communities growing in the IWP. Ice-wedge cracking in water-saturated sediments started immediately after lake drainage at about 3950 cal yrs BP and led to the ... |
format |
Article in Journal/Newspaper |
author |
Fritz, Michael Wolter, Juliane Rudaya, Natalia Palagushkina, Olga Nazarova, Larisa Obu, Jaroslav Rethemeyer, Janet Lantuit, Hugues Wetterich, Sebastian |
author_facet |
Fritz, Michael Wolter, Juliane Rudaya, Natalia Palagushkina, Olga Nazarova, Larisa Obu, Jaroslav Rethemeyer, Janet Lantuit, Hugues Wetterich, Sebastian |
author_sort |
Fritz, Michael |
title |
Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada) |
title_short |
Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada) |
title_full |
Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada) |
title_fullStr |
Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada) |
title_full_unstemmed |
Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada) |
title_sort |
holocene ice-wedge polygon development in northern yukon permafrost peatlands (canada) |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2016 |
url |
https://kups.ub.uni-koeln.de/26510/ |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Arctic Canada Herschel Island Yukon |
geographic_facet |
Arctic Canada Herschel Island Yukon |
genre |
Arctic Herschel Herschel Island Ice permafrost Subarctic Thermokarst wedge* Yukon |
genre_facet |
Arctic Herschel Herschel Island Ice permafrost Subarctic Thermokarst wedge* Yukon |
op_relation |
Fritz, Michael orcid:0000-0003-4591-7325 , Wolter, Juliane orcid:0000-0001-6179-7621 , Rudaya, Natalia orcid:0000-0003-1536-6470 , Palagushkina, Olga orcid:0000-0002-8131-0216 , Nazarova, Larisa, Obu, Jaroslav orcid:0000-0002-8172-2536 , Rethemeyer, Janet, Lantuit, Hugues orcid:0000-0003-1497-6760 and Wetterich, Sebastian (2016). Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada). Quat. Sci. Rev., 147. S. 279 - 298. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0277-3791 |
_version_ |
1766346480864460800 |