SODBatch A&B SPM Comments co-chair response final ... - ipcc-wg3

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IPCC WGIII Fourth Assessment Report, Second Order Draft
concerns and offer a recommendation on an appropriate comparison
of the bottom-up estimates from Chapters 4 to 10 and the top-down
estimates from integrated models in Chapters 3 and 11. U.S.
Government
(Government of U.S. Department of State)
SPM-7 B 0 0 0 0 Because bioenergy is treated partially in so many chapters
(renewables, transport, and industry) there is no integrated or
detailed discussion of its potential. More cross-referencing is
needed and there should be a fuller discussion of the biorefinery
concept in one of the chapters—perhaps transport since biofuels are
perhaps the most important of its multiple products. U.S.
Government
(Government of U.S. Department of State)
SPM-8 6 B 0 0 0 0 Advanced technology should play a much more central role in the
SPM. Material should be brought forward from Chapter 2 into the
SPM. Suggested insertions to the SPM can come from:
-Chapter 1, p. 17, paragraph beginning w/line 33: the key concepts
this para should be better covered.
-Chapter 1, p. 20, line 46: Generally speaking, it would be
economically impossible, without technology research,
development, demonstration, deployment and diffusion
(RDDD&D) and Induced Technology Change (ITC) to stabilize
GHG concentration at a level that would prevent DAI with the
climate system.
-Chapter 2, p. 65, Figure 2.2: The point that distribution “optimal”
(cost-minimizing) emission scenarios is bimodal, illustrating that
technological lock-in into either high or low emissions futures
respectively that arise from technological interdependence and
spillover effects.
-Chapter 2, p. 69, lines 11-16: “Differences in the cost of meeting a
prescribed CO2 concentration target across alternative technology
development pathways that could unfold in the absence of climate
policies are more important than cost differences between
alternative stabilization levels within a given technology-reference
Expert Review of Second-Order-Draft
Confidential, Do Not Cite or Quote
Response suggested by cochairs
Action
for
chapter
See A-1 CG
biomass
TIA in considering para 6, but
space limited
� include
� include
� to be considered in
para 6.
Considerations
by the writing
team
3 issue not for
ch3.
(3)
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