10.1594/PANGAEA.994161Juma, Gabriel AGabriel AJuma0000-0002-2670-3543Alfred Wegener Institute - Biological Institute HelgolandGrotheer, HendrikHendrikGrotheer0000-0003-0207-3767Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenRuben, Manuel JannisManuel JannisRuben0000-0003-2618-6483Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenMeunier, Cédric LéoCédric LéoMeunier0000-0002-4070-4286Alfred Wegener Institute - Biological Institute HelgolandMollenhauer, GesineGesineMollenhauer0000-0001-5138-564XAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenBoersma, MaartenMaartenBoersma0000-0003-1010-026XAlfred Wegener Institute - Biological Institute HelgolandPANGAEA2026Arctic OceanCarbon sourcesMarine foodwebNearshore zoneOrganic carbon utilizationPermafrost coastsPlanktonic organismsEvent labelLaboratory code/labelSample code/labelCommentDATE/TIMELATITUDELONGITUDETransectStation labelDepth zoneDEPTH, waterTime point, descriptiveDistance to shoreFraction modern carbonFraction modern carbon, errorAge, datedAge, dated, errorΔ14CΔ14C, errorδ13CCarbon, totalδ15NNitrogen, particulateCarbon/Nitrogen ratioTrophic positionCarbon poolZoneSource materialBranched and isoprenoid tetraether indexReplicateFractionFraction, standard deviationPercentageWater sampler, UWITEC, USB 50050ShovelAccelerator mass spectrometry (AMS), Ionplus, MiCaDaSOrganic elemental analyzer, Elementar, Vario EL cube; coupled with Isotope ratio mass spectrometer (IRMS), Elementar, isoprime visIONCalculated using one-source Trophic Position modelHigh Performance Liquid Chromatography (HPLC-APCI-MS)Markov chain Monte Carlo algorithmCA-Land_2023_YukonCoastAWI Arctic Land ExpeditionNUNATARYUK, Permafrost thaw and the changing Arctic coast, science for socioeconomic adaptation (NUNATARYUK)2023-07-12T00:00:00/2023-07-22T00:00:00Dataset10.3389/feart.2020.59893310.1016/j.nimb.2021.03.01610.2307/30718753736 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThe 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.-139.01-138.87501569.55327169.569Canadian ArcticHorizon 2020 of the European Commissionhttps://doi.org/10.13039/501100007601773421NUNATARYUK, Permafrost thaw and the changing Arctic coast, science for socioeconomic adaptation