Long-term meteorological and carbon, water and energy flux data from the Boreal Ecosystem Research and Monitoring Sites, Saskatchewan, Canada - Barr, A.; Black, T. A.; Helgason, W.; Ireson, A.; Johnson, B.; McCaughey, J. H.; Nesic, Z.; Hrynkiw, C.; Ross, A.; Hedstrom, N. (Earth Syst. Sci. Data Discuss., 2025)