Maier, Jan; Visser, Anna-Neva; Schubert, Christina Martina; Wander, Simon Thomas; Barth, Johannes Arthur (2025): Seasonal Dataset of DO, δ¹⁸ODO and Biogeochemical Parameters in the Danube River (2023–2024) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.983395 (DOI registration in progress)
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Published: 2025-07-03
Abstract:
This dataset contains dissolved oxygen (DO) concentrations, stable oxygen isotope ratios of DO (δ¹⁸ODO), particulate organic carbon (POC) concentrations, and respiration/photosynthesis (R/P) ratios, along with corresponding parameters (temperature, δ¹⁸OH2O, nitrate) collected from the Danube River and its key tributaries during five seasonal sampling campaigns in 2023 and 2024. Water samples were collected using a weighted 2 L sampling bottle submerged 1–2 meters below the surface, with sampling conducted from the river center via bridges or passenger boats, and occasionally from the riverbank. In situ temperature measurements were taken with a multiparameter instrument (HQ40d, HACH™, Loveland, CO, USA). δ¹⁸ODO was analyzed using a modified automated equilibration system (Gasbench II, ThermoFisher Scientific™) coupled to a DELTA V Advantage isotope ratio mass spectrometer (IRMS, ThermoFisher Scientific™). This dataset captures seasonal variations in DO dynamics and provides valuable insights into oxygen sources and sinks within the Danube River. The data support the study of biogeochemical cycling in large river systems and can inform ecosystem management and conservation strategies in the face of environmental and climate change.
Keyword(s):
Supplement to:
Maier, Jan; Visser, Anna-Neva; Schubert, Christina Martina; Wander, Simon Thomas; Barth, Johannes Arthur (submitted): Hydrodynamic and Primary Production Effects on Seasonal DO Variability in the Danube River.
Funding:
Horizon Europe (HorizonEU), grant/award no. 101094070: DALIA - Danube Region Water Lighthouse Action
Coverage:
Median Latitude: 46.496111 * Median Longitude: 18.675788 * South-bound Latitude: 43.621077 * West-bound Longitude: 8.154897 * North-bound Latitude: 49.025942 * East-bound Longitude: 29.344149
Date/Time Start: 2023-07-07T00:00:00 * Date/Time End: 2024-09-04T00:00:00
Minimum ELEVATION: 3.0 m a.s.l. * Maximum ELEVATION: 1078.0 m a.s.l.
Event(s):
Parameter(s):
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:
4988 data points
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