High-frequency dissolved organic carbon, nitrate, and total dissolved nitrogen from the Oksrukuyik Creek outlet near Toolik Field Station, Alaska, summer 2020-2021

Climate change is predicted to accelerate hydrologic cycle and amplify the release of carbon and nutrients from the permafrost landscapes of the Arctic. However, we have limited understanding of how seasonality and landscape characteristics influence hydrologic mobilization and transport of carbon and nutrients into Arctic river networks. To fill this knowledge gap, we assessed river carbon and nutrient dynamics across a lake-dominated. We deployed submersible, uv-visible optical sensors (V2 s::can uv-vis spectrophotometers) that quantify water chemistry at high frequencies at the outlet of the Oksrukuyik Creek watershed (72 square kilometers) near Toolik Field Station, on the North Slope of Alaska. We deployed the sensors continuously from June through August or September and optically determined absorbance spectra (220-700 nanometers), which were paired with grab samples to build calibration models to predict solute concentration using partial-least squares regression (PLSR). This data file includes these predicted high frequency concentrations of river chemistry data taken every ~15 minutes during the flow season post-freshet conditions. The data file includes date and time, and PLSR-calibrated dissolved organic carbon (DOC), nitrate (NO3), and total dissolved nitrogen (TDN) concentrations.