21. A Spatiotemporal Assessment of Extreme Cold in Northwestern North America Following the Unidentified 1809 CE Volcanic Eruption Leland, Caroline Wogan; Davi, Nicole K.; Anchukaitis, Kevin J.; Andreu Hayles, Laia; Porter, Trevor J.; Galloway, T.; Mant, M.; Wiles, Greg; Wilson, Robert J.; Beaulieu, S.; Oelkers, Rose C.; Gaglioti, Benjamin V.; Rao, Mukund Palat; Reid, E.; Nixon, Troy 2023 Articles Volcanic eruptionsDendrochronologyTree-ringsClimatic changesEruption of Mount Tambora (Mount Tambora, Indonesia : 1815)