Leaf-level gas exchange, Moist acidic tundra snowfence, Toolik Lake Field Station, Alaska, 2016

Snow accumulation and retention patterns in the Arctic are undergoing rapid change, with consequences for critical ecosystem processes and climate feedbacks. We used a 22-year International Tundra Experiment (ITEX) snow manipulation experiment with increased and decreased winter snow treatments to quantify how winter snow depth affects leaf-level ecophysiology and plant use of snow meltwater. We coupled measurements of leaf-level gas exchange and leaf tissue chemistry (%N, %C, δ13C, and δ15N) with an analysis of stable isotopes (δ18O and δ2H) in active layer water, precipitation, and stem water. This is the leaf-level gas exchange dataset for four community dominants, Salix pulchra, Betula nana, Eriophorum vaginatum, and Ledum palustre.