Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Niggemann Jutta jutta.niggemann@uni-oldenburg.de 0000-0003-1237-9233 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Wagner Sasha wagnes3@rpi.edu Rensselaer Polytechnic Institute RPI https://www.rpi.edu https://ror.org/01rtyzb94 Förster Oliver oliver.foerster1@uol.de Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Leclerc Ahlyia J. leclea@rpi.edu Rensselaer Polytechnic Institute RPI https://www.rpi.edu https://ror.org/01rtyzb94 Ulber Ina Ida ina.ida.ulber@uol.de Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Günther Jana jana_guenther@web.de Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Simon Heike heike.simon@uol.de Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 2026 BPCA-derived dissolved black carbon concentrations in porewater and hot-water Soxhlet extracts of Guaymas Basin deep subsurface sediments dataset https://doi.pangaea.de/10.1594/PANGAEA.997437 2026-09-29T10:19:46 Dissolved black carbon (DBC) is a condensed aromatic fraction of dissolved organic matter (DOM) and an important component of the marine carbon cycle. Hydrothermal systems have been suggested as a potential source of DBC to the deep ocean, but the mobilization and origin of DBC in organic-rich hydrothermal sediments remain poorly constrained. This dataset contains benzene polycarboxylic acid (BPCA)-derived dissolved black carbon (DBC) concentrations from porewater and water-extractable hot-water Soxhlet extracts of deep subsurface sediments collected during IODP Expedition 385 in the Guaymas Basin (Gulf of California). Sample handling and the preparation and characterization of porewater and hot-water Soxhlet extracts have been described previously (Teske et al., 2021; Knoke et al., 2025). DBC was quantified using the benzene polycarboxylic acid method. Methanolic SPE-DOM extracts were oxidized with nitric acid, and the resulting BPCAs were quantified by ultra-performance liquid chromatography (UPLC). Benzene pentacarboxylic acid (B5CA) and benzene hexacarboxylic acid (B6CA) were considered for DBC quantification, and DBC concentrations were calculated according to Stubbins et al. (2015). The dataset includes B5CA and B6CA concentrations, B6CA/B5CA ratios, calculated DBC concentrations, and operationally defined hot-water-extractable DBC normalized to sediment total organic carbon content. Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Böning Philipp p.boening@icbm.de 0009-0003-7375-4567 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Friebe Matthias matthias.friebe@uol.de Gründken Eleonore eleonore.gruendken@uni-oldenburg.de Günther Jana jana_guenther@web.de Klaproth Katrin katrin.klaproth@uol.de Ulber Ina ina.ida.ulber@uni-oldenburg.de Simon Heike heike.simon@uol.de Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 2025 Molecular composition of dissolved organic matter and biogeochemical parameters in porewater of Guaymas Basin (Gulf of California) deep subsurface sediments dataset bundled publication https://doi.org/10.1594/PANGAEA.974052 Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Niggemann Jutta jutta.niggemann@uni-oldenburg.de 0000-0003-1237-9233 Wagner Sasha wagnes3@rpi.edu Förster Oliver oliver.foerster1@uol.de Leclerc Ahlyia J. leclea@rpi.edu Ulber Ina Ida ina.ida.ulber@uol.de Günther Jana jana_guenther@web.de Simon Heike heike.simon@uol.de Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 2026 Stable carbon isotope composition (δ¹³C) of dissolved black carbon in hot-water Soxhlet extracts [MS1.1] of Guaymas Basin deep subsurface sediments dataset https://doi.pangaea.de/10.1594/PANGAEA.997438 Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Niggemann Jutta jutta.niggemann@uni-oldenburg.de 0000-0003-1237-9233 Wagner Sasha wagnes3@rpi.edu Förster Oliver oliver.foerster1@uol.de Leclerc Ahlyia J. leclea@rpi.edu Ulber Ina Ida ina.ida.ulber@uol.de Günther Jana jana_guenther@web.de Simon Heike heike.simon@uol.de Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 2026 Temperature-dependent changes in dissolved black carbon during heating of marine and terrestrial dissolved organic matter reference materials dataset https://doi.pangaea.de/10.1594/PANGAEA.997430 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 2008 The molecular level determination of black carbon in marine dissolved organic matter journal article Organic Geochemistry 39(4) https://doi.org/10.1016/j.orggeochem.2008.01.015 396-407 Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Günther Jana jana_guenther@web.de Böning Philipp p.boening@icbm.de 0009-0003-7375-4567 Teske Andreas P teske@email.unc.edu Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 2025 Hydrothermal mobilization and molecular transformations of dissolved organic matter from deep subsurface sediments journal article Geochimica et Cosmochimica Acta https://doi.org/10.1016/j.gca.2025.06.005 S0016703725003084 Stubbins Aron aron.stubbins@skio.uga.edu 0000-0002-3994-1946 Spencer Robert G M 0000-0003-0777-0748 Mann Paul James paul.mann@northumbria.ac.uk 0000-0002-6221-3533 Holmes R Max 0000-0002-6413-9154 McClelland James W 0000-0001-9619-8194 Niggemann Jutta jutta.niggemann@uni-oldenburg.de 0000-0003-1237-9233 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 2015 Utilizing colored dissolved organic matter to derive dissolved black carbon export by arctic rivers journal article Frontiers in Earth Science 3 https://doi.org/10.3389/feart.2015.00063 Teske Andreas P teske@email.unc.edu Lizarralde Daniel 0000-0001-6152-6039 Höfig Tobias Walter t.hoefig@fz-juelich.de 0000-0002-9254-4528 2021 Guaymas Basin Tectonics and Biosphere book Proceedings of the International Ocean Discovery Program, International Ocean Discovery Program 385 https://doi.org/10.14379/iodp.proc.385.2021 -111.88900999999998 -111.21973500000001 27.2063866667 27.6372083333 -111.71897985714364 27.503109142842852 2016-12-15T15:46:29 2019-11-04T05:30:00 -2.0 485.94 irregular surface Deutsche Forschungsgemeinschaft, Bonn DFG http://www.dfg.de/en/ https://doi.org/10.13039/501100001659 447583997 IODP GUAYMAS BASIN - The biogeochemistry of dissolved organic matter in hydrothermal Guaymas Basin sediments https://uol.de/en/icbm/marine-geochemistry/research/dom-at-interfaces/iodp-guaymas-basin 385-U1545A 27.6372 -111.889 Guaymas Basin -1593.52 2019-09-26T20:45:00 2019-10-01T09:25:00 Exp385 2019-09-16T00:00:00 2019-11-16T00:00:00 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Teske, Andreas P Lizarralde, Daniel Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Core drilling CDRILL 74 (APC = 17, HLAP = 31, XCB = 26) 503.3 m 77.3 % 385-U1545B 27.6372 -111.8888 Guaymas Basin -1594.24 2019-10-01T09:25:00 2019-10-04T16:45:00 Exp385 2019-09-16T00:00:00 2019-11-16T00:00:00 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Teske, Andreas P Lizarralde, Daniel Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Core drilling CDRILL 67 (APC = 17, HLAP = 40, XCB = 10) 387.3 m 87.8 % 385-U1547B 27.5069 -111.6789 Guaymas Basin -1732.22 2019-10-16T21:25:00 2019-10-20T05:00:00 Exp385 2019-09-16T00:00:00 2019-11-16T00:00:00 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Teske, Andreas P Lizarralde, Daniel Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Core drilling CDRILL 50 (APC = 10, HLAP = 14, XCB = 26) 209.8 m 76.9 % 385-U1550B 27.2528 -111.5074 Guaymas Basin -2001.21 2019-10-28T20:20:00 2019-10-30T05:30:00 Exp385 2019-09-16T00:00:00 2019-11-16T00:00:00 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Teske, Andreas P Lizarralde, Daniel Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Core drilling CDRILL 23 (APC = 12, HLAP = 5, XCB = 6) 174.2 m 92.3 % 385-U1551B 27.2064 -111.2197 Guaymas Basin -1843.9 2019-11-03T18:30:00 2019-11-04T05:30:00 Exp385 2019-09-16T00:00:00 2019-11-16T00:00:00 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Teske, Andreas P Lizarralde, Daniel Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Core drilling CDRILL 6 (APC) 48.5 m 103.1 % AT37-06_4864 27.5063 -111.6815 Guaymas Basin -1725.0 2016-12-15T15:46:29 2016-12-15T23:07:30 Submersible Alvin ALVIN AT37-06_4865 27.5091 -111.6818 Guaymas Basin -1726.0 2016-12-16T15:37:38 2016-12-16T19:20:48 Submersible Alvin ALVIN 1519 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Event label Event Teske Andreas P teske@email.unc.edu Event LATITUDE Latitude http://en.wikipedia.org/wiki/ISO_6709 Teske Andreas P teske@email.unc.edu Latitude LONGITUDE Longitude http://en.wikipedia.org/wiki/ISO_6709 Teske Andreas P teske@email.unc.edu Longitude Date/time start Date/time start http://en.wikipedia.org/wiki/ISO_8601 Teske Andreas P teske@email.unc.edu Date/time start Date/time end Date/time end http://en.wikipedia.org/wiki/ISO_8601 Teske Andreas P teske@email.unc.edu Date/time end Sample code/label Sample label DSDP/ODP/IODP sample designation hdl:10013/epic.27914.d001 Teske Andreas P teske@email.unc.edu Sample label (DSDP/ODP/IODP sample designation) Replicate Repl Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Repl Sample type Samp type Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 porewater or Soxhlet extract with ultrapure water after Knoke et al. (2025) Samp type (porewater or Soxhlet extract ...) DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Teske Andreas P teske@email.unc.edu Depth sed [m] Temperature, in rock/sediment t °C Temperature Θ http://dbpedia.org/resource/Temperature rock sediment http://purl.obolibrary.org/obo/ENVO_00002007 Teske Andreas P teske@email.unc.edu t [°C] Benzenepentacarboxylic acid B5CA µmol/l Molar Concentration Benzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITY Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 quantified after nitric acid oxidation according to Dittmar (2008) B5CA [µmol/l] (quantified after nitric acid ...) Benzenehexacarboxylic acid B6CA µmol/l Molar Concentration Benzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITY Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 quantified after nitric acid oxidation according to Dittmar (2008) B6CA [µmol/l] (quantified after nitric acid ...) Benzenepentacarboxylic acid/Benzenehexacarboxylic acid ratio B6CA/B5CA ratio Calculated Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Molar ratio of B6CA to B5CA B6CA/B5CA (Molar ratio of B6CA to B5CA, ...) Black carbon, dissolved DBC µmol/l black carbon https://en.wikipedia.org/wiki/Black_carbon dissolved http://purl.obolibrary.org/obo/PATO_0001986 Molar Concentration Benzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITY Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Dissolved black carbon concentration calculated from B5CA and B6CA concentrations according to Stubbins et al. (2015) DBC [µmol/l] (Dissolved black carbon concen...) Black carbon, dissolved/carbon, organic, dissolved ratio DBC/DOC % black carbon https://en.wikipedia.org/wiki/Black_carbon carbon C https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:27594 dissolved http://purl.obolibrary.org/obo/PATO_0001986 organic ratio Dimensionless Ratio ψ Benzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITY Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Dissolved black carbon as percentage of dissolved organic carbon. DOC concentrations are published in Knoke et al. (2025) DBC/DOC [%] (Dissolved black carbon as per...) Black carbon, dissolved per unit mass total organic carbon DBC/TOC g/kg black carbon https://en.wikipedia.org/wiki/Black_carbon dissolved http://purl.obolibrary.org/obo/PATO_0001986 total organic carbon TOC Benzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITY Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 DBC concentration of water-extractable DOM normalized to the original sediment TOC content. See Knoke et al. (2025, 2026) DBC/TOC [g/kg] (DBC concentration of water-ex...) Black carbon, dissolved per unit mass total organic carbon DBC/TOC g/kg black carbon https://en.wikipedia.org/wiki/Black_carbon dissolved http://purl.obolibrary.org/obo/PATO_0001986 total organic carbon TOC Benzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITY Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 DBC concentration of porewater DOM normalized to the original sediment TOC content. See Knoke et al. (2025, 2026) DBC/TOC [g/kg] (DBC concentration of porewate...) CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels Dissolved Black Carbon Dissolved Organic Matter Guaymas Basin hydrothermal mobilization IODP porewater author100500 author101580 author108860 author108861 author108862 author109456 author119059 author119060 author119061 author28319 author32411 author35350 author37338 author46053 author53674 author53785 author54503 author63589 author68043 author69917 author72200 author97063 author98209 award3467 basis5 campaign3390598 campaign47026 curlevel30 event3200127 event3200128 event3200129 event3200130 event3200131 event3200132 event3200133 funder213 geocode1 geocode1599 geocode1600 geocode1601 geocode8128 inst22987 inst461 journal12339 journal16812 journal6009 license21 method10903 method11666 method19615 method50 method5059 param129269 param150986 param152460 param190305 param513556 param513560 param577525 param577526 param577529 param6766 param7059 param790 pi35350 pi68043 ref130980 ref137389 ref141767 ref141768 refds974052 refds997430 refds997438 term1073131 term1073493 term22142 term2663825 term38263 term38303 term38477 term40462 term41056 term43794 term43863 term43972 term44030 term44419 term48527 term49036 term492 term51513 term76960 term78587 topotype6