Schubert Christina Martina christina.cs.schubert@fau.de Friedrich-Alexander-Universität Erlangen-Nürnberg, GeoZentrum Nordbayern https://ror.org/00f7hpc57 van Geldern Robert robert.van.geldern@fau.de http://www.gzn.uni-erlangen.de/en/applied-geosciences/staff/academic-staff/van-geldern/ 0000-0003-2786-2893 Friedrich-Alexander-Universität Erlangen-Nürnberg, GeoZentrum Nordbayern https://ror.org/00f7hpc57 Barth Johannes A C johannes.barth@fau.de 0000-0002-3494-4507 Friedrich-Alexander-Universität Erlangen-Nürnberg, GeoZentrum Nordbayern https://ror.org/00f7hpc57 Visser Anna-Neva anna-neva.visser@fau.de Friedrich-Alexander-Universität Erlangen-Nürnberg, GeoZentrum Nordbayern https://ror.org/00f7hpc57 2026 Hydrology, hydrochemistry, carbon dynamics, and calculated pCO2 and CO2 fluxes from the Wiesent, a karst headwater stream in Germany, 2023-2024 dataset bundled publication https://doi.pangaea.de/10.1594/PANGAEA.996469 2026-08-12T10:00:20 These datasets contains hydrological, hydrochemical, and biogeochemical measurements collected along a 3.25 km spring-to-stream transect in the Wiesent karst headwater in northern Bavaria, Germany, between March 2023 and May 2024. Monthly observations at 13 sites include field parameters (discharge, pH, electrical conductivity, redox potential, and water temperature), major ions and trace metals, dissolved and particulate carbon pools (DIC, DOC, POC), stable carbon and oxygen isotopes (δ13CDIC/DOC/POC [‰ VPDB], δ18ODO [‰ VSMOW]), and calculated partial pressure of CO2 (pCO2), CO2 fluxes, and gas-transfer velocities. In addition, a 24 h diel survey conducted in August 2023 provides the same field, carbon-system, stable isotope, pCO2, FCO2 and gas-transfer parameters at three representative sites along the transect at 4 h intervals. The dataset provides a basis for studies of karst hydrochemistry, carbon and oxygen cycling, carbonate buffering, spring-water and surface-water interactions, and CO2 evasion under varying hydroclimatic conditions. Schubert Christina Martina christina.cs.schubert@fau.de van Geldern Robert robert.van.geldern@fau.de http://www.gzn.uni-erlangen.de/en/applied-geosciences/staff/academic-staff/van-geldern/ 0000-0003-2786-2893 Barth Johannes A C johannes.barth@fau.de 0000-0002-3494-4507 Visser Anna-Neva anna-neva.visser@fau.de submitted Stable but transient – episodic sensitivity in a buffered German karst headwater stream journal article Hydrological Processes 11.1536399999999 11.19159 49.9728399999999 49.97744 11.168661671794855 49.97605849230767 2023-03-09T00:00:00 2024-05-13T00:00:00 German Research Foundation DFG http://www.dfg.de/en/ https://doi.org/10.13039/501100001659 BA 2207/27-1 KarLoss German Research Foundation DFG http://www.dfg.de/en/ https://doi.org/10.13039/501100001659 GE 2338/4-1 KarLoss 5 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Sample ID | Sampling date | Date | Distance | Stream flow, width | Stream flow w | Stream flow, depth | Stream flow d | Discharge | Q | Impeller, Miniflügel M1, SEBA Hydrometrie | Temperature, water | Temp | Multi-parameter portable meter, Xylem Analytics, WTW MultiLine® 3630 IDS | pH | Conductivity | Cond | Oxidation reduction (RedOx) potential | Eh | Oxygen | O2 | Fluoride | F- | Ion chromatograph, Metrohm, 930 Compact IC Flex | Chloride | Cl- | Sulfate | [SO4]2- | Nitrate | [NO3]- | Sodium | Na | Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP Qc | Magnesium | Mg | Potassium | K | Silicon | Si | Calcium | Ca | Aluminium | Al | Manganese | Mn | Iron | Fe | Sampling date/time, experiment | Date/time sampling exp | Alkalinity, total | AT | Eco Titrando, Methrom AG | Carbon, inorganic, dissolved | DIC | Isotope ratio mass spectrometer (IRMS), Thermo Scientific, Delta plus XP | ‰ VPDB | δ13C, dissolved inorganic carbon | δ13C DIC | Carbon, organic, dissolved | DOC | Total Organic Carbon Analyzers, Xylem, OI Analytical Aurora 1030W TOC Analyzer [SKU: 322110] coupled to a DELTA V Plus Advantage isotope ratio mass spectrometer | δ13C, dissolved organic carbon | δ13C DOC | Carbon, organic, particulate | POC | Element analyser, Costech Analytical Technologies, ECS 4010 CHNS-O | δ13C, particulate organic carbon | δ13C POC | Carbon dioxide, partial pressure | pCO2 | Calculated from temperature, pH values and c(DIC) | Carbon dioxide efflux rate | CO2 efflux | Calculated from k600 and concentration gradient of dissolved CO2 in stream water and in the water at equilibrium with overlaying atmosphere | Transfer velocity, scaled | k600 | Calculated from stream hydraulic parameters | ‰ VSMOW | δ18O, dissolved oxygen | δ18O O2 | Isotope-Ratio Mass spectrometry (IRMS), ThermoFisher Scientific, Delta V Advantage with GasBench II carbonate preparation device CO2 flux dissolved inorganic carbon (DIC) dissolved organic carbon (DOC) Hydrochemistry karst stream major ions and trace elements northern Bavaria pCO2 Stable carbon and oxygen isotopes Stream Water method13465 method16510 method17639 method17662 method18858 method19482 method19483 method19484 method19485 method19486 method19488 method7397 param106417 param106858 param136897 param152481 param16065 param162619 param18664 param191285 param47 param50 param508785 param516121 param520628 param521507 param534324 param54 param548539 param559976 param559988 param564055 param567740 param57 param58 param59 param60 param717 param754 param762 param763 param764 param770 param79734 param83981 param87094 param92436 pi111462 author111461 author111462 author37087 author43415 award4992 award4993 funder20472 geocode1599 geocode1600 geocode1601 inst20360 journal6667 license21 ref140758 term47619 term50114 term50429 term51100 term72462 term73571 term78028 term78030 term78034 term78368