1. Intergovernmental Panel on Climate Change Working Group I Climate Change, the IPCC Scientific Assessment (Cambridge Univ. Press, Cambridge, 1990).
2. Intergovernmental Panel on Climate Change Working Group II Climate Change, the IPCC Impacts Assessment (Australian Government Publishing Service, Canberra, 1990).
3. Smith, J. B. & Tirpak, D. EPA-230-05-89-050 (U.S. Environmental Protection Agency, Washington DC, 1989).
4. Rind, D. et al. J. geophys. Res. 95, 9983–10004 (1990).
5. Hansen, J. et al. Mon. Weath. Rev. 111, 609–662 (1983).