Description
This dataset contains field measurements and supporting hydrochemical and isotope data collected from the glacier-fed stream Virkisá in southeast Iceland between 2023 and 2025. The dataset was compiled to investigate spatial and seasonal patterns of carbon dioxide (CO2) exchange between the stream and the atmosphere, as well as the hydrochemical processes controlling CO2 dynamics in a basaltic glacial catchment.
The first worksheet includes direct CO2 flux measurements from multiple sampling campaigns conducted along the Virkisá stream, together with associated environmental variables such as pH, electrical conductivity, dissolved oxygen (ODO), water temperature, and additional hydrochemical parameters. The sheet also contains dissolved organic carbon (DOC) concentrations and stable water isotope measurements (δ²H and δ¹⁸O) from stream samples.
The second worksheet contains hourly predicted δ²H and δ¹⁸O isotope values used for hydrological interpretation and mixing analyses. These predictions provide temporally continuous isotope estimates for the study period.
The third worksheet provides average isotopic compositions of hydrological end-members used in the isotope mixing analysis. These include fallback end-member values applied in periods with limited sample availability to ensure seasonal consistency of the mixing model approach.
Together, the dataset supports analyses of CO2 fluxes, hydrochemistry, silicate weathering, and hydrological mixing processes in glacier-fed streams under changing climatic conditions.
License
Except where otherwised noted, this item's license is described as Attribution 4.0 International