These data include annual peak abundances of two deciduous shrubs, dwarf birch (Betula nana) and gray willow (Salix glauca), sampled non-destructively from 2003-2017 near Kangerlussuaq, Greenland, as part of an ongoing experiment. The experiment involves exclusion of large herbivores (caribou and muskoxen) and passive warming according to the International Tundra Experiment protocol, and was motivated by an interest in investigating interactive and singular influences of herbivory and warming on plant abundance and community composition. Data include annual aboveground total abundance of each species on experimental plots under four treatment/control combinations: exclosed ambient, exclosed warmed, grazed ambient, and grazed warmed.

This data set consists of annual observed first dates of emergence and leaf opening by plant species occurring at a study site near Kangerlussauq, Greenland. This is part of an ongoing effort to monitor the timing of plant emergence and species-level variation in emergence timing in relation to observed variation in climate and weather. Observations were recorded on a daily or near-daily basis on multiple, randomly distributed, permanently marked plots. The first date of emergence or leaf opening for each species observed on each plot was recorded as the day of year.