van Kaam Rianne J M rvankaam@marum.de 0000-0002-9410-8447 2025 Total organic carbon and stable carbon isotopes of dust samples from ephemeral rivers in Namibia analyzed after the sorption experiment dataset https://doi.org/10.1594/PANGAEA.972505 2025-07-24T11:50:26 https://doi.org/10.1594/PANGAEA.972507 van Kaam Rianne J M rvankaam@marum.de 0000-0002-9410-8447 Kölling Martin koelling@uni-bremen.de http://www.marum.de/Martin_Koelling.html 0000-0003-2720-2211 Elvert Marcus melvert@marum.de 0000-0003-3863-0975 Hinrichs Kai-Uwe khinrichs@uni-bremen.de 0000-0002-0739-9291 Zabel Matthias mzabel@uni-bremen.de 0000-0003-4681-1821 2025 Dust deposition directly affects the concentration of dissolved organic carbon in the ocean journal article Marine Chemistry 271 https://doi.org/10.1016/j.marchem.2025.104531 104531 14.5084 15.0394 -23.5629 -21.899 14.7271 -22.876066666666663 2023-04-22T00:00:00 2023-04-23T00:00:00 MARUM Center for Marine Environmental Sciences https://www.marum.de/en/ MARUM - Center for Marine Environmental Sciences, University Bremen MARUM http://www.marum.de/ https://ror.org/04ers2y35 German Research Foundation DFG http://www.dfg.de/en/ https://doi.org/10.13039/501100001659 390741603 EXC 2077: The Ocean Floor – Earth's Uncharted Interface https://gepris.dfg.de/gepris/projekt/390741603 1-Kuiseb -23.5629 15.0394 2023-04-22T00:00:00 Kuiseb, Gobabeb, Namibia Dust sample DUST 2-Kuiseb -23.1663 14.6335 2023-04-23T00:00:00 Kuiseb, Rooibank, Namibia Dust sample DUST 3-Omaruru -21.899 14.5084 2023-04-23T00:00:00 Omaruru, Namibia Dust sample DUST 90 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Different amounts of dust (5 mg and 100 mg) were added to a mixture (30 mL) of artificial seawater and 13C-labeled Spirulina extract (~500 µM). Water samples were taken at multiple time points (0, 10, 24, 48, 72, 120, and 168 hours) and analyzed for DOC using a carbon analyzer (multiN/C 2100s, Analytik Jena). Dust samples were analyzed for TOC and δ13C-TOC before and after the experiments using isotope ratio mass spectrometry (IRMS) (Delta V Plus, Thermo Scientific, with a ConFlo IV interface to an elemental analyzer), calibrated against the Vienna Pee Dee Belemnite (VPDB) standard with a precision of ±0.35‰. After 72 hours, water samples were also analyzed for δ13C-DIC using isotope ratio infrared spectrometry (IRIS) with a universal reference interface (URI) (Delta Ray, Thermo Scientific), calibrated to the VPDB standard with a precision of ±0.05‰. Event label Event van Kaam Rianne J M rvankaam@marum.de 0000-0002-9410-8447 Event Type of study Study type type van Kaam Rianne J M rvankaam@marum.de 0000-0002-9410-8447 Study type Sample code/label Sample label van Kaam Rianne J M rvankaam@marum.de 0000-0002-9410-8447 Sample label Dust, added Dust add mg dust http://purl.obolibrary.org/obo/ENVO_00002008 Mass M http://dbpedia.org/resource/Mass van Kaam Rianne J M rvankaam@marum.de 0000-0002-9410-8447 Dust add [mg] Carbon, organic, total TOC % carbon C https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:27594 organic total https://www.oxforddictionaries.com/definition/american_english/total Dimensionless Ratio ψ Isotope ratio mass spectrometry (IRMS), Delta V Plus (Thermo Scientific) coupled via a ConFlo IV interface to an elemental analyser van Kaam Rianne J M rvankaam@marum.de 0000-0002-9410-8447 wt% TOC [%] δ13C, total organic carbon δ13C TOC ‰ PDB δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes total organic carbon TOC Isotope ratio mass spectrometry (IRMS), Delta V Plus (Thermo Scientific) coupled via a ConFlo IV interface to an elemental analyser van Kaam Rianne J M rvankaam@marum.de 0000-0002-9410-8447 vs. VPDB δ13C TOC [‰ PDB] δ13C, total inorganic carbon δ13C TIC ‰ PDB δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes total inorganic carbon TIC Isotope ratio infrared spectrometry (IRIS) with universal reference interface (URI) connection, Delta Ray (Thermo Scientific) van Kaam Rianne J M rvankaam@marum.de 0000-0002-9410-8447 vs. VPDB δ13C TIC [‰ PDB] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels citable Adsorption dissolved organic carbon (DOC) Ephemeral river Mineral dust Namibia Sorption experiments author107322 author23309 author27446 author626 author672 award747 curlevel30 event3186677 event3186678 event3186679 funder20472 geocode1599 geocode1600 geocode1601 inst277 journal10808 license21 method12027 method17150 method17151 param178882 param185520 param30613 param533010 param67 param790 pi107322 project4011 ref128613 term1073089 term1073534 term38253 term38303 term38477 term40456 term43794 term43892 term44419 term49506 term49733 term51189 term73571 term74719 term74720 term74721 term74722 term74774 term74775