Sonntag, S., Ferrer-Gonzalez, M., Ilyina, T., Kracher, D., Nabel, J. E. M. S., Niemeier, U., et al. (2018). Quantifying and comparing effects of climate engineering methods in the earth system. Earth's Future, 6(2), 149-168. doi:10.1002/2017EF000620.