1. Hanson PJ, Riggs JS, Nettles R, Phillips JR, Krassovski MB, Hook LA, Gu L, Richardson AD, Aubrecht DM, Ricciuto DM, et al. Attaining whole-ecosystem warming using air and deep-soil heating methods with an elevated CO<sub>2</sub> atmosphere. Biogeosciences. 2017;14(4):861–883. doi:10.5194/bg-14-861-2017