Government Comments on the Final Draft of the SPM IPCC Working ...

<strong>Government</strong> <strong>Comments</strong> on the Final Draft of the SPM
IPCC Working Group I Fourth Assessment Report
Batch
Page:line
No.
From To Comment
SPM-808 A 12:28 12:29 What does “apparent increase” imply? Delete sentence unless strong evidence exists regarding the “apparent increase”.
Alternatively, replace that sentence with “The ability of these AOGCMs to simulate typhoons and hurricanes has not been
adequately demonstrated.”
[Govt. of United States of America (Reviewer’s comment ID #: 2023-85)]
SPM-809 A 12:28 The term "apparent" seems quite weak considering the quality of the observations showing this increase. We propose to
replace "apparent by "actual".
[Govt. of France (Reviewer’s comment ID #: 2010-51)]
SPM-810 A 12:31 12:33 The wind, precipitation, and temperature patterns change not only outside the tropics but also in the tropics. Observations
show evidence for obvious changes in them in the tropics during the last 20 years, so the projections of future should include
that of the tropics.
[Govt. of China (Reviewer’s comment ID #: 2006-39)]
SPM-811 A 12:31 12:31 What is the confidence level of the statement about poleward moving storm-track changes?
[Govt. of United States of America (Reviewer’s comment ID #: 2023-86)]
SPM-812 A 13:1 13:15 It is suggested that the first dot point on this page, which deals with precipitation, and Figure SPM-6 be moved to page 12,
directly below Figure SPM-5. This would provide precipitation projections with a better prominence in the section, and it
follows the structure of the other parts of the SPM.
[Govt. of Australia (Reviewer’s comment ID #: 2002-124)]
SPM-813 A 13:1 13:4 This paragraph fails to provide information on expected precipitation changes in the tropics. TS-54, lines 38-40 states that
"precipitation generally increases in the tropical precipitation maxima". This statement should be added, with a likelihood
estimate, to the SPM text. It is further suggested to add the names of specific regions where increases or decreases are very
likely to occur (from TS-56, lines 8-16).
[Govt. of European Community (Reviewer’s comment ID #: 2008-25)]
SPM-814 A 13:1 13:4 Clarify whether these estimates include carbon cycle feedback
[Govt. of United Kingdom (Reviewer’s comment ID #: 2022-41)]
SPM-815 A 13:2 13:2 Note that the expected increase in precipitation at high latitudes does not imply that soil moisture increases, of importance to
the future of methane emissions from soils (the average soil moisture response actually decreases in models). It would be very
useful to indicate that here.
[Govt. of United States of America (Reviewer’s comment ID #: 2023-87)]
SPM-816 A 13:2 Please add "yearly" before precipitation; indeed, this can vary with seasons.
[Govt. of France (Reviewer’s comment ID #: 2010-52)]
SPM-817 A 13:5 It would be useful to have also some information on intertropical and equatorial precipitation amounts.
[Govt. of France (Reviewer’s comment ID #: 2010-53)]
SPM-818 A 13:6 13:15 Figure SPM-6: the authors should explain why they have adapted Figure 10.9, for the purposes of the SPM. In particular it is
not clear why the 20 year averages used in Figure 10.9 have been reduced to 10 year averages.
[Govt. of Australia (Reviewer’s comment ID #: 2002-125)]
SPM-819 A 13:6 13:15 Figure SPM-6: As previously noted the authors should explain why they have chosen to focus on the A1B scenario.
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