Knoke, Melina; Dittmar, Thorsten; Niggemann, Jutta; Wagner, Sasha; Förster, Oliver; Leclerc, Ahlyia J.; Ulber, Ina Ida; Günther, Jana; Simon, Heike; Seidel, Michael (2026): Temperature-dependent changes in dissolved black carbon during heating of marine and terrestrial dissolved organic matter reference materials [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997430 (DOI registration in progress)
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Published: 2026-09-29
Abstract:
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 data from heating experiments performed to investigate the temperature-dependent mobilization of dissolved black carbon (DBC) from marine and terrestrial dissolved organic matter (DOM) reference materials under controlled aqueous heating conditions. The experiments were conducted with solid-phase extracted (SPE) marine DOM from North Equatorial Pacific Intermediate Water (NEqPIW), sampled and isolated at the Natural Energy Laboratory of Hawaii Authority (NELHA) as described by Green et al. (2014), and Suwannee River Natural Organic Matter (SRNOM), a terrestrial DOM reference material provided by the International Humic Substances Society (IHSS) and fisrt described by Serkiz & Perdue (1990). The reference materials were dissolved in ultrapure water and afterwards subjected to temperature treatments of 25, 80, 100, and 180 °C. DBC was determined using the benzene polycarboxylic acid (BPCA) method after Dittmar et al. (2008) and Wagner et al., (2017). BPCAs were quantified by ultra-performance liquid chromatography (UPLC), and DBC concentrations were calculated from benzene pentacarboxylic acid (B5CA) and benzene hexacarboxylic acid (B6CA) concentrations according to Stubbins et al. (2015). The dataset includes benzene tetracarboxylic acid (B4CA), B5CA, and B6CA concentrations, BPCA ratios, and calculated DBC concentrations for the different temperature treatments.
Keyword(s):
Related to:
Knoke, Melina; Böning, Philipp; Dittmar, Thorsten; Friebe, Matthias; Gründken, Eleonore; Günther, Jana; Klaproth, Katrin; Ulber, Ina; Simon, Heike; Seidel, Michael (2025): Molecular composition of dissolved organic matter and biogeochemical parameters in porewater of Guaymas Basin (Gulf of California) deep subsurface sediments [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.974052
Knoke, Melina; Dittmar, Thorsten; Niggemann, Jutta; Wagner, Sasha; Förster, Oliver; Leclerc, Ahlyia J.; Ulber, Ina Ida; Günther, Jana; Simon, Heike; Seidel, Michael (2026): BPCA-derived dissolved black carbon concentrations in porewater and hot-water Soxhlet extracts of Guaymas Basin deep subsurface sediments [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997437
Knoke, Melina; Dittmar, Thorsten; Niggemann, Jutta; Wagner, Sasha; Förster, Oliver; Leclerc, Ahlyia J.; Ulber, Ina Ida; Günther, Jana; Simon, Heike; Seidel, Michael (2026): Stable carbon isotope composition (δ¹³C) of dissolved black carbon in hot-water Soxhlet extracts [MS1.1] of Guaymas Basin deep subsurface sediments [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997438
References:
Dittmar, Thorsten (2008): The molecular level determination of black carbon in marine dissolved organic matter. Organic Geochemistry, 39(4), 396-407, https://doi.org/10.1016/j.orggeochem.2008.01.015
Green, Nelson W; Perdue, E Michael; Aiken, George R; Butler, Kenna D; Chen, Hongmei; Dittmar, Thorsten; Niggemann, Jutta; Stubbins, Aron (2014): An intercomparison of three methods for the large-scale isolation of oceanic dissolved organic matter. Marine Chemistry, 161, 14-19, https://doi.org/10.1016/j.marchem.2014.01.012
Kohler, Kevin E; Gill, Shaun M (2006): Coral Point Count with Excel extensions (CPCe): A Visual Basic program for the determination of coral and substrate coverage using random point count methodology. Computers & Geosciences, 32(9), 1259-1269, https://doi.org/10.1016/j.cageo.2005.11.009
Serkiz, Steven M; Perdue, E Michael (1990): Isolation of dissolved organic matter from the suwannee river using reverse osmosis. Water Research, 24(7), 911-916, https://doi.org/10.1016/0043-1354(90)90142-S
Stubbins, Aron; Spencer, Robert G M; Mann, Paul James; Holmes, R Max; McClelland, James W; Niggemann, Jutta; Dittmar, Thorsten (2015): Utilizing colored dissolved organic matter to derive dissolved black carbon export by arctic rivers. Frontiers in Earth Science, 3, https://doi.org/10.3389/feart.2015.00063
Wagner, Sasha; Brandes, Jay; Goranov, Aleksandar I; Drake, Travis W; Spencer, Robert G M; Stubbins, Aron (2017): Online quantification and compound‐specific stable isotopic analysis of black carbon in environmental matrices via liquid chromatography‐isotope ratio mass spectrometry. Limnology and Oceanography-Methods, 15(12), 995-1006, https://doi.org/10.1002/lom3.10219
Funding:
Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. 447583997: IODP GUAYMAS BASIN - The biogeochemistry of dissolved organic matter in hydrothermal Guaymas Basin sediments
Coverage:
Median Latitude: 36.611591 * Median Longitude: -75.998381 * South-bound Latitude: 19.733300 * West-bound Longitude: -156.066700 * North-bound Latitude: 53.152839 * East-bound Longitude: 8.167196
Date/Time Start: 2009-09-24T00:00:00 * Date/Time End: 2025-09-18T00:00:00
Minimum Elevation: -674.0 m * Maximum Elevation: -674.0 m
Event(s):
BPCA_NEqPIW_heating_exp * Latitude: 53.152839 * Longitude: 8.167196 * Date/Time Start: 2025-09-12T00:00:00 * Date/Time End: 2025-09-18T00:00:00 * Location: Oldenburg, Germany * Method/Device: Laboratory experiment * Comment: Experimental analysis at the Institute for Chemistry and Biology of the Marine Environment (ICBM), School of Mathematics and Science, Carl von Ossietzky Universität Oldenburg, Ammerländer Heerstraße 114-118, 26129 Oldenburg, Germany
BPCA_SRNOM_heating_exp * Latitude: 42.728919 * Longitude: -73.679740 * Date/Time Start: 2024-01-08T00:00:00 * Date/Time End: 2024-04-24T00:00:00 * Location: Troy, New York, USA * Method/Device: Laboratory experiment * Comment: Experimental analysis at the Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, Troy, New York, USA
NELHA_NEqPIW_2009 (North Equatorial Pacific Intermediate Water) * Latitude: 19.733300 * Longitude: -156.066700 * Date/Time: 2009-09-24T00:00:00 * Elevation: -674.0 m * Location: Kailua‑Kona, Hawaii, USA * Method/Device: Solid‑phase extracted (SPE) of filtered seawater according to Green et al. 2014
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Seidel, Michael | |||
| 2 | Type of study | Study type | Seidel, Michael | |||
| 3 | Sample code/label | Sample label | Seidel, Michael | |||
| 4 | Batch | Batch | Seidel, Michael | |||
| 5 | Treatment: temperature | T:temp | °C | Seidel, Michael | Experimental temperature | |
| 6 | Replicate | Repl | Seidel, Michael | |||
| 7 | Sample source | Sample source | Seidel, Michael | Dissolved organic matter reference material: North Equatorial Pacific Intermediate Water (NEqPIW) ist one of the oldest water masses in the ocean. Its sampling and processing were describend in Green et al. (2014). The second DOM sample Suwannee River Natural Organic Matter (SRNOM) was obtained as a powder from the International Humic Substances Society (IHSS) its sampling and processing were described in detail by Serkiz & Perdue (1990) | ||
| 8 | Benzenehexacarboxylic acid | B6CA | µmol/l | Seidel, Michael | Benzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITY | quantified after nitric acid oxidation according to Dittmar (2008) |
| 9 | Benzenepentacarboxylic acid | B5CA | µmol/l | Seidel, Michael | Benzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITY | quantified after nitric acid oxidation according to Dittmar (2008) |
| 10 | Benzenetetracarboxylic acid | B4CA | µmol/l | Seidel, Michael | Benzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITY | quantified after nitric acid oxidation according to Dittmar (2008) |
| 11 | Black carbon, dissolved | DBC | µmol/l | Seidel, Michael | Calculated according to Stubbins et al. (2015) | calculated from B5CA and B6CA concentrations |
| 12 | Black carbon, dissolved | DBC | mg/l | Seidel, Michael | Calculated according to Stubbins et al. (2015) | calculated from B5CA and B6CA concentrations |
| 13 | Benzenepentacarboxylic acid/Benzenehexacarboxylic acid ratio | B6CA/B5CA | Seidel, Michael | Calculated | Molar ratio of B6CA to B5CA | |
| 14 | Benzenepentacarboxylic acid/Benzenetetracarboxylic acid ratio | B5CA/B4CA | Seidel, Michael | Calculated | Molar ratio of B6CA to B5CA |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
585 data points