https://doi.pangaea.de/10.1594/PANGAEA.997204Fisher, Ben JBen JFisher0000-0001-7113-2818Heriot-Watt UniversitySeidel, MichaelMichaelSeidel0000-0003-0934-1939Carl von Ossietzky University of OldenburgWaite, NicoleNicoleWaite0000-0002-1107-4959Institute of Marine and Coastal Sciences, Rutgers UniversityManning, Miah LynneMiah LynneManningInstitute of Marine and Coastal Sciences, Rutgers UniversityCappola, MichaelMichaelCappolaUniversity of DelawareDittmar, ThorstenThorstenDittmar0000-0002-3462-0107Carl von Ossietzky University of OldenburgSchofield, OscarOscarSchofield0000-0003-2359-4131Institute of Marine and Coastal Sciences, Rutgers UniversityPoulton, Alex JAlex JPoulton0000-0002-5149-6961Heriot-Watt UniversityHenley, Sian FrancesSian FrancesHenley0000-0003-1221-1983Edinburgh Napier UniversityMolecular indices, phytoplankton community composition and associated environmental parameters along the West Antarctic Peninsula in summer 2023PANGAEA2026d13CDissolved Organic Matterfield observationsFT-ICR MSPhytoplankton compositionship-basedSouthern OceanstoichiometryEvent labelLATITUDELONGITUDEDEPTH, waterDATE/TIMESalinityTemperature, waterFluorescenceCarbon, organic, dissolvedNitrogen, total dissolvedCarbon, organic, dissolved, solid phase extractableNitrogen, organic, dissolved, solid phase extractableSulfur, organic, dissolved, solid phase extractablePhosphorus, organic, dissolved, solid phase extractableδ13C, organic matter, dissolved, solid phase extractableMass of molecular formulasOxygen/Carbon ratioHydrogen/Carbon ratioAromaticity index, modifiedCarbonHydrogenOxygenNitrogenSulfurPhosphorusDouble bond equivalentHighly unsaturated compoundsUnsaturated compoundsSaturated compoundsDegradation indexIndex of photodegradationIndex of biological formation and transformationDiatomaceae pennales, biovolumeDiatomaceae centrales, biovolumeCryptophyta, biovolumeDinoflagellates, biovolumeFlagellates indeterminata, biovolumePhytoplankton, non diatoms, biovolumeCTD/RosetteCTD, Sea-Bird, SBE 911plusFluorometer, WET Labs Inc., ECO FLRTDHigh-temperature catalytic combustion, Shimadzu, Shimadzu TOC-VCPH equipped with TDN unitInductively coupled plasma-quadrupole-mass spectrometry (ICP-Q-MS), Agilent 7500cIsotope ratio mass spectrometer, Thermo Fisher Scientific, Delta V Advantage [ConFlo III interface]; coupled to elemental analyzer, Carlo Erba, NA 2500Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS)Imaging Flow Cytobot (IFCB), McLane Research Laboratories Inc.LMG2301Laurence M. GouldPalmer Long-Term Ecological Research (Palmer-LTER)2023-01-04T10:11:30/2023-01-28T12:04:28Datasethttps://doi.pangaea.de/10.1594/PANGAEA.99731310.1021/acs.est.3c0592910.4319/lom.2008.6.23010.5194/bg-9-1935-201210.1002/rcm.2386https://zenodo.org/records/1539781810 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalAs part of the Palmer LTER research program during a 24 day period across January 2023, we conducted oceanographic CTD sampling at 10 sites across the West Antarctic Peninsula (4 on the shelf, 6 on the coast), with a view to link different marine phytoplankton communities to distinct molecular signatures of solid phase extracted (SPE) dissolved organic matter. We include ultrahigh resolution mass spectrometry (Fourier-transform ion cyclotron resonance mass spectrometer, FT-ICR-MS) data, molecular indicies calculated from these data (IPhoto, IDeg, IBio), isotopic (SPE-DOM-d13c) and stoichiometric (SPE-DOC,SPE-DON,SPE-DOS,SPE-DOP) values. These parameters were then compared against the biovolume abundance of different phytoplankton groups, determined through Imaging Flow Cytobot (IFCB) analysis. Additionally, we include basic environmental data (DOC, TDN, Fluorescence, Temperature, Salinity).Supported by the Antarctic Science International Bursary, "Is Southern Ocean dissolved organic matter export influenced by phytoplankton community composition?" https://www.antarcticsciencebursary.org.uk-78.48554-64.39954-69.82935-64.60813Southern OceanGerman Research Foundationhttps://doi.org/10.13039/501100001659390741603EXC 2077: The Ocean Floor – Earth's Uncharted InterfaceNational Science Foundationhttps://doi.org/10.13039/1000000010217282Palmer Long-Term Ecological ResearchNational Science Foundationhttps://doi.org/10.13039/1000000010823101Palmer Long-Term Ecological ResearchNational Science Foundationhttps://doi.org/10.13039/1000000011440435Palmer Long-Term Ecological ResearchNational Science Foundationhttps://doi.org/10.13039/1000000019011927Palmer Long-Term Ecological ResearchNational Science Foundationhttps://doi.org/10.13039/1000000019632763Palmer Long-Term Ecological ResearchNational Science Foundationhttps://doi.org/10.13039/100000001OPP-2026045ANT Integrated System SciencesNatural Environment Research Councilhttps://doi.org/10.13039/501100000270NE/S007407/1E4: Edinburgh Earth, Ecology and Environment Doctoral Training Partnership