This dataset contains the percent land cover of woody shrubs in shrub-dominated ecotypes within Ukkusiksalik National Park from 1998 to 2013. This is a remote sensing measure that uses Landsat imagery collected on an annual basis during peak phenology in the summer. The increase in percent cover of shrubs is an important indicator of climate change in northern ecosystems. Changes in regional climate affect the growing season length, permafrost, and soil temperature and moisture, which ultimately affect land cover. Quantifying the expansion of woody shrubs into tundra will enable park managers to predict ecological responses such as shifts in wildlife ranges or impacts to species at risk.