Environmental Engineering Reference
In-Depth Information
Appendix A
Statement of Task
The stabilization of atmospheric greenhouse gas concentrations and
the avoidance of serious or irreversible impacts on earth's climate system
are a matter of critical concern in both scientific and policy arenas. Using
the most current science available, this study will evaluate the implica-
tions of different atmospheric concentration target levels and explain the
uncertainties inherent in the analyses to assist policy makers as they make
decisions about stabilization target levels for atmospheric greenhouse gas
concentrations.
This study will:
• Evaluate a range of greenhouse gas stabilization targets and
describe the types and scales of impacts likely associated
with different ranges, including discussion of the associated
uncertainties, timescale of impacts, and potential serious or
irreversible impacts.
1
This study will focus on evaluating the implications of a range of GHG
stabilization targets, but it will not involve the committee's assessment of
what stabilization targets are technically feasible nor their normative judg-
ment on what targets are most appropriate.
1
This study will consider cumulative emissions of the “basket” of gases considered in the
Kyoto protocol (CO
2
, CH4, N2O, HFCs, PFCs, SF6). Any particular overall stabilization target
could include varying combinations of emissions targets for the different gases.
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