Summary: 24. C. E. Forest, P. H. Stone, A. P. Sokolov, M. R. Allen, M.
D. Webster, Science 295, 113 (2001).
25. Transient temperature change in 2100 is not, in
general, equilibrium change. The inertia of the cli-
mate system is such that climate change will contin-
ue long after greenhouse gas concentrations are sta-
bilized or emissions eliminated. Some outcomes that
avoid exceeding a DAI threshold until 2100 will ex-
ceed that threshold in the next century. Therefore,
the time horizon of analysis will affect the potential
for DAI. However, what is "dangerous" is itself a
function of adaptive capacity, not a static quantity,
dependent on social and economic development. So,
the very threshold for any percentile X, DAI[X], can
itself change with time and social conditions.
26. In the DICE model, carbon taxes serve as a proxy for
general climate policy controls. Thus, we do not
present carbon tax data as a preferred method for
mitigation or a required method to produce our
results. Instead, these results should be seen as a