PANGAEA_994161 Isotopic composition of water and planktonic communities during Canadian Arctic expedition in summer 2023 Juma, Gabriel A; Grotheer, Hendrik; Ruben, Manuel Jannis; Meunier, Cédric Léo; Mollenhauer, Gesine; Boersma, Maarten Isotopic composition of water and planktonic communities during Canadian Arctic expedition in summer 2023 2026-06-15 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.994161 Investigator Gabriel A Juma Earth Science Event label Laboratory code/label Sample code/label Comment DATE/TIME LATITUDE LONGITUDE Transect Station label Depth zone DEPTH, water Time point, descriptive Distance to shore Fraction modern carbon Fraction modern carbon, error Age, dated Age, dated, error Δ14C Δ14C, error δ13C Carbon, total δ15N Nitrogen, particulate Carbon/Nitrogen ratio Trophic position Carbon pool Zone Source material Branched and isoprenoid tetraether index Replicate Fraction Fraction, standard deviation Percentage geoscientificInformation Arctic Ocean CA-Land_2023_YukonCoast Carbon sources Marine foodweb Nearshore zone Organic carbon utilization Permafrost coasts Planktonic organisms Shovel Water sampler, UWITEC, USB 50050 YC_23_Pia_1000m YC_23_Pia_100m YC_23_Pia_2000m YC_23_Pia_200m YC_23_Pia_500m YC_23_Pia_50m YC_23_Slump_D_1000m YC_23_Slump_D_100m YC_23_Slump_D_2000m YC_23_Slump_D_200m YC_23_Slump_D_500m YC_23_Slump_D_50m YC_23_Slump_D_Permafrost Accelerator mass spectrometry (AMS), Ionplus, MiCaDaS Organic elemental analyzer, Elementar, Vario EL cube; coupled with Isotope ratio mass spectrometer (IRMS), Elementar, isoprime visION Calculated using one-source Trophic Position model High Performance Liquid Chromatography (HPLC-APCI-MS) Markov chain Monte Carlo algorithm AWI Arctic Land Expedition 2023-07-12 2023-07-22 Complete 69.553271 69.569 -139.01 -138.875015 0.3 m (DEPTH, water) 12.0 m (DEPTH, water) NUNATARYUK NUNATARYUK, Permafrost thaw and the changing Arctic coast, science for socioeconomic adaptation 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 3736 data points text/tab-separated-values Bristol, Emily; Connolly, Craig; Lorenson, Thomas D; Richmond, Bruce M; Ilgen, Anastasia G; Choens, R Charles; Bull, Diana L; Kanevskiy, Mikhail Z; Iwahana, Go; Jones, Benjamin M; McClelland, James W (2021): Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska. Frontiers in Earth Science, 8, 598933, https://doi.org/10.3389/feart.2020.598933 Mollenhauer, Gesine; Grotheer, Hendrik; Gentz, Torben; Bonk, Elizabeth; Hefter, Jens (2021): Standard operation procedures and performance of the MICADAS radiocarbon laboratory at Alfred Wegener Institute (AWI), Germany. Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, 496, 45-51, https://doi.org/10.1016/j.nimb.2021.03.016 Post, David M (2002): Using stable isotopes to estimate trophic position: Models, methods, and assumptions. Ecology, 83(3), 703-718, https://doi.org/10.2307/3071875

The Yukon Coast Land Expedition was conducted in July 2023 along an active retrogressive thaw slump; active-slump (AS), and a non-slump (NS) transect up to 2000 m from the shore, near Herschel Island-Qikiqtaruk, in the Northwest Canadian Arctic. The aim was to investigate the the concentrations and isotopic composition (δ13C, 14C, and 15N) of DIC and POC in the water column. Additionally, isotopic analysis was done for the most abundant organisms in the different trophic levels within the Arctic Ocean's nearshore zone to determine organic carbon (OC) sources and utilization in the coastal food web. The surface water was taken at the upper 50 cm while the bottom water was taken at 50 cm above the sediment, using a USB 50050 water sampler. δ13C and δ15N were measured using an Elementar Vario EL Cube, interfaced to an Isoprime VisION IRMS (Elementar UK Ltd, Cheadle, UK) at University of California-Davis in the USA. δ14C was determined using Mini Carbon Dating System (MICADAS) accelerator mass spectrometer at the Alfred-Wegener-Institute, Bremerhaven in Germany. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.994161"!

http://en.wikipedia.org/wiki/ISO_6709 LATITUDE http://en.wikipedia.org/wiki/ISO_6709 LONGITUDE http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME https://doi.org/10.1016/j.nimb.2021.03.016 Standard operation procedures and performance of the MICADAS radiocarbon laboratory at Alfred Wegener Institute (AWI), Germany https://doi.org/10.2307/3071875 Using stable isotopes to estimate trophic position: Models, methods, and assumptions https://doi.org/10.3389/feart.2020.598933 Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska https://hdl.handle.net/10013/epic.51432.d001 Fraction modern carbon https://hdl.handle.net/10013/epic.51432.d001 Fraction modern carbon, error https://www.nunataryuk.org NUNATARYUK DIF 9.4 2026-06-15 2026-07-14