Dataset and R codes for the article: Acclimation of photosynthetic capacity of key mature North America’s boreal conifers to whole-ecosystem warming and elevated CO2 in the field

This dataset contains empirical data on photosynthetic capacity (Vcmax and Jmax), and associated leaf mass per unit area (LMA) and leaf Nitrogen (N) data collected on two dominant conifer species, Picea mariana and Larix laricina, in June and August 2017 at the SPRUCE (Spruce and Peatland Responses Under Changing Environments) experiment that assesses the response of peatland ecosystems to whole-ecosystem warming and elevated atmospheric CO2 concentrations. The SPRUCE experiment is located 40 Km north of Grand Rapids, MN, in the USDA Forest Service Marcell Experimental Forest.