Using stable isotopes to estimate travel times in a data-sparse arctic catchment: challenges and possible solutions

We thank the Natural Environment Research Council NERC (HYDRA project NE/K000268/1 and NE/K000284/1) and the European Research Council ERC for funding (VeWa project GA 335910). We also are grateful to Dr Jason Lessels and HYDRA team members for field work and sample collection. We further thank Dr. Jonathan Dick for running the isotope analysis.