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-490 A 8:8 8:9 In the Second Order Draft of this chapter it was said "suggest that the Antarctic Ice Sheet likely also contributed to the last
interglacial high stand. The rate of
sea level rise leading to this high-stand may have exceeded 1 m/century." (SOD 6-3 lines 1-2). The underlying literature
appears to support this interpretation? If it still stands it needs to included in the SPM here.
[Govt. of Germany (Reviewer’s comment ID #: 2011-67)]
SPM-491 A 8:8 8:8 Change “implying” to ”suggesting”.
[Govt. of United States of America (Reviewer’s comment ID #: 2023-57)]
SPM-492 A 8:9 8:9 Again, why not refer to WAIS, as chapter 10 does, since there is not compelling evidence that EAIS made a contribution
(although it can't be ruled out). Also, why use "may"? If 4-6m SLR is "likely" and "no more than 4m" (from Greenland and
other Arctic ice) is also "likely" then isn't a WAIS contribution also "likely" ? Please be logical.
[Govt. of Belgium (Reviewer’s comment ID #: 2003-36)]
SPM-493 A 8:10 8:10 It should be acknowledged in the SPM that our paleoclimatic knowledge of the Southern Hemisphere is much more limited
than the Northern Hemisphere. Suggest the inclusion, as a new dot point of the chapter 6 finding that "Knowledge of climate
variability over the last 1000 years in the Southern Hemisphere and tropics is limited due to the lower density of paleoclimatic
records".
[Govt. of Australia (Reviewer’s comment ID #: 2002-81)]
SPM-494 A 8:12 8:46 The 'Understanding and attributing climate change' section should include a statement about how much the observed sea-level
rise can be attributed to anthropogenic influence. (section 9.5.2)
[Govt. of Belgium (Reviewer’s comment ID #: 2003-37)]
SPM-495 A 8:12 8:46 The 'Understanding and attributing climate change' section should better clarify our understanding of the role of solar
radiation on climate change over the past 50 years.
[Govt. of Belgium (Reviewer’s comment ID #: 2003-38)]
SPM-496 A 8:12 8:12 Change the title of the section : "Understanding and attributing current climate change" Rationale : the section is focused on
the last 50 years
[Govt. of Switzerland (Reviewer’s comment ID #: 2020-19)]
SPM-921 B 8:12 8:20 Under the umbrella of the Section Understanding and Attributing Climate Change, the statement is made on the assumption
that there is sufficient geophysical data to permit a reliable computation of globally and continental averaged temperatures
since the mid-20th century. Although it may be acceptable that the confidence of such statements relays on data obtained from
long-time establshed meteorological observation stations, it has to be recognize that there are large continental areas with no
observation stations and with stations which operation has decayed in the last decades. It is also known that the Southern
Hemisphere oceans have very few observations, although it may be argued that satellite ovservations may provide some
informatin impossible to obtain over land. In this regards, for a host of reasons, it would be opportune to point out such
deficiencies. This is important since we are aiming to brief decision makers about climate change and its implications on the
physics of climate, it would be more than necessary to remark the value of ovservations, even if the case that satellites would
provide some solutions (though limited in many respects). No science can be developed without the necessary basic data.
Therefore, it is suggested to report that, in spite of known deficiencies in the density and operation of observation stations, it is
likely that, based in the available records of reliable and permanent observation stations, the conclusions are valid and the
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