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

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Comments
IPCC WGIII Fourth Assessment Report, Second Order Draft
3 A 4 6 4 6
per capita because of its economic status. U.S. Government
(Government of U.S. Department of State)
Redraft to read 'Greenhouse gas emissions ranges derived from
long-term baseline…'
(Government of UK)
3 A 4 6 4 8 What does this statement actually tell us? a) The modelling
community is small and nourishes its tools and baselines? b) SRES
has set the standards? c) The range in SRES baselines is infinitely
large, so every new baseline will fit in? See comment on whole
paragraph.
(Government of European Community / European Commission)
3 A 4 6 4 15 This paragraph is written much too vague and defensively. What is
understood by "long-term" in this context. Quantify the range. Why
is the range so large? What can be said about some common
denominators and key differences (contribution to global GHG
emissions of sectors, countries/regions, and for instance energy
supply technologies? (role of CCS, nuclear, renewables))
(Government of European Community / European Commission)
3 A 4 6 4 15 A line on the “implications of higher oil prices of past 3 to 5 years”
could be added if evidence exists in chapters
(Government of India)
3 A 4 7 0 0 This passage addresses scenarios of greenhouse gas -- SRES –
scenarios. But it does not mention impact scenarios, crucial for
generating scenarios for costs. Working Group II in the FAR does
include some of the potential non-linear changes in impacts that are
becoming more plausible. Coral reefs, for example, could collapse
in the coming decades, from bleaching, pollution, overfishing and
disease. Forests in some areas – US West, in particular, are
vulnerable to massive losses due to the combined factors described
by Westerling et al. (2006) – earlier snowmelt, higher summer
temperatures, longer season for fires and expansion of vulnerable
areas in elevation. Then there is the added factor of tree deaths from
pests and diseases (Burkett et al., 2005. Bark beetle infestations, for
example, are affecting pines from Arizona to Alaska, also driven by
Expert Review of Second-Order-Draft
Confidential, Do Not Cite or Quote
Response suggested by cochairs
Action
for
chapter
ACC ACC
(1)
REJ; statement tells the relevant
message that not much is
changed compared to TAR
REJ; point here is to assess the
SRES scenarios, not to explain
them again
See A-256 TIA
(1)
Considerations
by the writing
team
REJ: Agree with
TSU
(1)
REJ: Paragraph
on baseline
(1)
REJ; not the WG3 mandate Requires a
principal
discussion
where in
Chapter
damages will be
dealt with
(1)
Page 69 of 348