Sedimentology, biogeochemistry stable isotopes, pollen, plant macrofossils, and diatoms from two sediments cores from the northern Yukon permafrost peatlands (Canada) ...

• Main Authors: Fritz, Michael, Wolter, Juliane, Rudaya, Natalia, Palagushkina, Olga V, Nazarova, Larisa B, Obu, Jaroslav, Rethemeyer, Janet, Lantuit, Hugues, Wetterich, Sebastian
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2016
• Subjects: Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; Herschel; Herschel Island; Ice; permafrost; Subarctic; Thermokarst; wedge*; Yukon
• Online Access: https://dx.doi.org/10.1594/pangaea.856781; https://doi.pangaea.de/10.1594/PANGAEA.856781

Ice-wedge polygon (IWP) mires 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 a low-centered 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, d13C), stable water isotopes (d18O, dD), 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 (SU1: 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 ... : Supplement to: Fritz, Michael; Wolter, Juliane; Rudaya, Natalia; Palagushkina, Olga V; Nazarova, Larisa B; Obu, Jaroslav; Rethemeyer, Janet; Lantuit, Hugues; Wetterich, Sebastian (2016): Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada). Quaternary Science Reviews, 147, 279-297 ...