Smith, C. J., Forster, P. M., Allen, M., Leach, N., Millar, R. J., Passerello, G. A., and Regayre, L. A.: FAIR v1.3: a simple emissions-based impulse response and carbon cycle model, Geosci Model Dev, 11, 2273–2297, https://doi.org/10.5194/gmd-11-2273-2018, 2018.