PANGAEA_971246 Biogeochemical characteristics of sediment cores from a land – shore transect in the Teshekpuk Lake Region in Arctic Alaska, 2022 Giest, Frieda; Jenrich, Maren; Grosse, Guido; Jones, Benjamin; Mangelsdorf, Kai; Windirsch, Torben; Strauss, Jens Biogeochemical characteristics of sediment cores from a land – shore transect in the Teshekpuk Lake Region in Arctic Alaska, 2022 2024-09-20 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.971246 Investigator Frieda Giest frieda_giest@hotmail.de Earth Science Event label Latitude of event Longitude of event Sample ID Depth, top/min Depth, bottom/max DEPTH, sediment/rock Carbon, total Carbon, organic, total Nitrogen, total Carbon, organic, total/Nitrogen, total ratio δ13C, organic carbon δ15N, organic matter Carbon, organic, total Mercury geoscientificInformation AK-Land_2022_NorthSlope AK-Land_2022_NorthSlope_TES22-DLB1-01 AK-Land_2022_NorthSlope_TES22-LAG1-01 AK-Land_2022_NorthSlope_TES22-LAG2-01 AK-Land_2022_NorthSlope_TES22-MAR1-02 AK-Land_2022_NorthSlope_TES22-TKL1-02 AK-Land_2022_NorthSlope_TES22-UPL1-02 Biomarker coastal thermokarst DLB LAG land-ocean transition MAR Organic carbon Permafrost Push corer SDLAG SIPRE corer Teshekpuk Lake TKL UPL AWI Arctic Land Expedition 2022-04-25 2022-04-27 Complete 70.8361944444 70.8855861111 -153.708283333 -153.5088 0.015 m (DEPTH, sediment/rock) 2.15 m (DEPTH, sediment/rock) AWI_Perma Permafrost Research unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 511 data points text/tab-separated-values Giest, Frieda; et al. (submitted): Organic Carbon, Mercury, and Sediment Characteristics along a land – shore transect in Arctic Alaska.

This dataset describes six sediment cores (12 - 219 cm length) from different landscape features in a coastal permafrost thermokarst affected landscape in the Theshekpuk Lake region in Arctic Alaska. They are located in a transect from inland to coast, to describes the transitional dynamics between terrestrial and marine permafrost and thermokarst. The cores were drilled during the Perma-X Lagoon expedition in April 2022. The three unfrozen cores from a marine (MAR, 12 cm length), an intact lagoon (LAG, 31 cm length) and a thermokarst lake (TKL, 50 cm length) site, were all sampled using a Push Corer. The three frozen cores, including upland permafrost (UPL, 203 cm length), drained thermokarst lake basin (DLB, 219 cm length) and semi-drained lagoon (SDLAG, 183 cm length) deposits, were drilled using a SIPRE Corer. The biogeochemical analysis included subsamples taken in intervals of 5–10 cm along the cores. Parameters included total carbon (TC) [wt%], total organic carbon (TOC) [wt%], total nitrogen (TN) [wt%], TOC/TN ratio, δ¹³C [‰ vs. VPDB] , δ¹⁵N [‰ vs. air raw], TOC density (TOCvol) [kg/m³], and mercury (Hg) [µg/kg]. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.971246"!

https://www.awi.de/en/science/geosciences/permafrost-research.html AWI_Perma DIF 9.4 2024-09-20 2026-04-30