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

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Comments
IPCC WGIII Fourth Assessment Report, Second Order Draft
B 2 0 0 0 Figure SPM.1: On the vertical axis, please use Gt CO2-eq, and not
Pg, as the units "tonnes" and "Gigatonnes" are better understood by
policymakers. Keep Pg for chemists. The conversion note just
above the caption should be reversed: 1 Gt = 1 Pg. A bigger
question I have about this figure is: "Why are only the KP gases
shown ?" The 2006 Special report on the ozone layer and climate
showed the importance of emissions from banks of CFC, HFCs, ...
and ignoring them here is misleading the policymakers. Another
very important gas is tropospheric ozone, which is affected by a
large uncertainty, but is also potentially responsible for 10-20% of
the anthropogenic radiative forcing. If the WG3 report is about
mitigation in the general sense, it should also show in this synthesis
plot the relative importance of ALL anthropogenic GHG, including
CFCs, HFCs, O3, etc. It would give an additional argument for the
exploitation of the synergies between climate protection and air
quality improvement (for O3), which are mentioned in paragraph
32 of the SPM.
(Jean-Pascal van YPERSELE, Université catholique de Louvain
(Belgium))
A 3 0 3 0 Figure SPM2 is not of easy understanding. We suggest that it is
replaced with Figure 1.5, providing the same information but in a
more clear format.
(,)
A 3 0 3 0 Figure SPM.3. This is a very informative figure but also somewhat
loaded. I suggest to delete the %-numbers shown after the countrygroup
names in the coloured rectangles of the graph, because the
area of the rectangles already reflects the %-shares and on the top
of the diagram the aggregate shares of Annex I and Non Annex I
countries are shown too. An editorial improvement could be to
select the colours of the blocks better and to apply one basic colour
per Annex I/ Non Annex I blowk with shadings for the country
groups within that particular colour (perhaps match the colours with
the ones of figure SPM.2, using the driving forces that are most
prominent in the two blocks, e.g. wealth in Annex I and population
Expert Review of Second-Order-Draft
Confidential, Do Not Cite or Quote
Response suggested by cochairs
ACC units
REJ other suggestions, because
we only do emission charts, no
radiative forcing ones in SPM
Action
for
chapter
Considerations
by the writing
team
Agree with TSU
and in relation
to radiative
forcing, etc
TIA regarding
ODS
(1)
See A-26 Rej; Will
improve Fig
SPM2
(1)
ACC 1 ACC
(1)
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