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

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Comments
IPCC WGIII Fourth Assessment Report, Second Order Draft
Agriculture row is for 2020 emissions; the Agriculture row should
be adjusted to correspond to 2030 (unless the “2020” was a
typographical error, in which case it should be changed to “2030”).
U.S. Government
(Government of U.S. Department of State)
B 10 1 11 0 It is unclear how the estimate of mitigation potential in Table
SPM.2 for the transport sector was developed. This text indicates
that they are the potentials for light duty vehicles, biofuels and
aviation only, but a sum for these factors is not shown in either
Chapter 5 or 11. Chapter 11, Pg. 16, lines 36-42, referring to the
transport sector, states “… some crude extrapolation is required for
overall coverage.”, but does not explain the basis or process for
extrapolation. Finally, Table 5.17, is a summary of CO2 mitigation
potential in the transport sector from several studies, but none
estimate the 28.3% reduction indicated in this table. That table
provides cost estimates for specific technologies, but not for the
global total. There are costs estimates for an unspecified amount of
mitigation in LDVs, which indicate that the cost will be below
$100/tCO2 if oil price is somewhat above $40/Bbl. U.S.
Government
(Government of U.S. Department of State)
B 10 1 10 0 In Table SPM.2 what is EIT? Define and put into acronyms table.
U.S. Government
(Government of U.S. Department of State)
B 10 1 0 0 The information in Table 10.6 (Chapter 10, page 27) provides the
regional breakdown and more comprehensive cost breakdown
needed to put the waste sector on the same basis as other sectors.
This information should be incorporated into Table SPM.2. The
table should have a footnote describing the concerns that Chapter
10 authors have about the quality of their emissions data. U.S.
Government
(Government of U.S. Department of State)
A 10 5 10 5 Add to footnote to explain whether B2 has 50% lower emissions in
2100 than WEO, or whether the two baselines are rather similar
Expert Review of Second-Order-Draft
Confidential, Do Not Cite or Quote
Response suggested by cochairs
translation to 2030 numbers is
needed
See A-693
DISCUSS
See A-693
ACC; glossary
See A-693
See A-720
See A-693
DISCUSS baseline issue; are
Action
for
chapter
5
Considerations
by the writing
team
ACC
(11)
See A-693
See A-720
(11)
11 WEO goes to
2030 only.
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