We are a team of 3 economists, who are attempting to compute paths of
sustainable human welfare over many generations. We require some
simple -- indeed, much simplified -- physically feasible paths of CO2
emissions and associated long-run stable levels of atmospheric
CO2. Ideally, we would like to be able to take three ordered pairs
'off the shelf' of climate science, call them (e1,S1), (e2,S2),
(e*,S*). (e1,S1) is a pair of emissions (e1) and CO2 concentration
(S1) for the year 2025. (e2,S2) is another such pair for the year
2050. And (e*,S*) is a pair that would be stable at 2075 and
thereafter.
We are not concerned with political or economic feasiblity for this
question, just physical feasibility. The rest of our model will take
care of the economic consequences of these choices of (e,S).
Ideally, we would like several regimes of these three ordered pairs,
with different levels of S* -- e.g, one for S*= 450 ppm CO2e, one for
S*=550 ppm CO2e, and so on.
We would much appreciate input from climate scientists to help us with
this question.
Humberto Llavador, University Pompeu Fabra, Barcelona
John Roemer, Yale University
Joaquim Silvestre, Univ of California, Davis
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