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-440 A 7:6 7:14 Table SPM-1: Move this table to SPM10, 25 just ahead of the section on projections.
[Govt. of Netherlands (Reviewer’s comment ID #: 2014-19)]
SPM-441 A 7:6 7:7 Should be adjusted in case of new levels of likelihood (see comment 3)
[Govt. of Russian Federation (Reviewer’s comment ID #: 2018-9)]
SPM-442 A 7:9 7:9 It should be: (a) See Footnote 5 (SPM-1) and Table 3.7 for definitions
[Govt. of Russian Federation (Reviewer’s comment ID #: 2018-10)]
SPM-443 A 7:16 7:16 Add Figure TS-20 Top (Records of Northern Hemisphere (NH) temperature variation during the last 1300 years ). A similar
figure appeared in the TAR and there was much controversy over this and high level attention from several governments to
the question of its veracity. Significant new work has been reported since then confirming the findings and it is relevant for
policymakers, therefore it should be included in the SPM.
[Govt. of Germany (Reviewer’s comment ID #: 2011-70)]
SPM-444 A 7:16 7:16 Change the title of the section : "Learnig from past climate" Rationale : the current title is not clear
[Govt. of Switzerland (Reviewer’s comment ID #: 2020-18)]
SPM-445 A 7:16 8:9 This section is a poorly developed. It is missing a discussion of abrupt change. This would seem a gap in important
messaging for Policymakers. Consider using lines 42-48 from page TS-31. Also, this section should do more to address the
'hockey stick' issue explicitly (see comment below).
[Govt. of Canada (Reviewer’s comment ID #: 2004-30)]
SPM-446 A 7:16 8:9 In the paleoclimatic section no mention is given to the 'climate optimum' period. This period was located before of the last
1300 years and after the last interglacial period. The spatial extent of the temperature anomaly during this period was not
global, and it is possible that this is the reason why it is not mentioned in this report. All the same, given the fact that it is very
well known to the public, maybe a sentence should be added within this Section about it and its relation to the present
temperature anomalies.
[Govt. of Italy (Reviewer’s comment ID #: 2012-20)]
SPM-447 A 7:16 8:9 Section: A Paleoclimatic Perspective
· this section is particularly week. it is not clear what its aim is and what is new since TAR
- this section could be used to discuss abrupt changes by drawing from the TS (TS 3.5)
- It would be very helpful to include a chart showing temperature and CO2 levels in the past to demonstrate correlation and
unprecedented nature of recent changes
[Govt. of United Kingdom (Reviewer’s comment ID #: 2022-12)]
SPM-448 A 7:16 8:9 It is not clear how the second bullet point might inform policy-making. Is this simply to help explain why global mean
temperatures were higher than present in the last interglacial period without anthropogenic greenhouse gases? Alternatevely,
this section ould be deleted as it adds nothing except confusion to the main messages of the SPM.
[Govt. of United Kingdom (Reviewer’s comment ID #: 2022-25)]
SPM-449 A 7:18 7:19 To provide a policy reader with further information about what paleoclimatic studies consist of, suggest that after the first
sentence a second sentence is added, as derived from the TS "Paleoclimatic studies make use of measurements derived from
bore hole temperatures, ocean sediment bore-water change, and glacier extent changes, as well as proxy measurements
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