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 9 2 9
(Belgium))
We propose to add a figure with the preindustrial levels of GHG
emissions and atmospheric concentrations of GHG. It would also
be usefull to have a table withthe absolute data and the % changes
of GHG emissions in the various sectors for the years 1970-2004
(Government of Switzerland)
A 2 10 2 12 The figure (SPM.1) is used appropriately here and illustrates the
growth in Kyoto GHG well - but see comments on the Technical
Summary and Chapter 1, below. In the context of the Summary, the
important uncertainty is that of the overall increase in GHG and the
current text concerning uncertainty serves only to confuse. The
uncertainty in fossil fuel CO2 , although it is small relative to the
emissions from fossil fuel combustion, would be much larger than
the uncertainties cited currently.
(Archie McCulloch, Marbury Technical Consulting)
A 2 10 2 11 Figure SPM.1. Title. 2nd line. Proposed rewording: "Uncertainty
about emissions of CO2 from deforestation, of CH4 and N2O from
agriculture, and of fluorinated gases is substantially higher than
uncertainty about other emissions". The unit Pg is perhaps more
"scientific" than the unit Gt, but the latter is very much more
understandable by humans (public, policy makers); please use Gt,
at least in SPM and TS
(Aviel VERBRUGGEN, University of Antwerp)
A 2 10 2 11 Redraft to read 'Uncertainty in CO2 emissions from fossil fuel
generally have lower uncertainty than other emissions.' [Waste
related sources have high uncertainty and the uncertainty in process
related HFC emissons may be relatively low. Suggested alternative
text is a simpler than trying to design a list]
(Government of UK)
A 2 10 2 10 Caption figure SPM.1: Replace "Uncertainty in CO2 emissions,
…." by "Uncertainty in emission estimates for deforestation (CO2),
agriculture (CH4 and N2O) and fluorinated gases is substantially
higher than for other emission sources."
(Government of European Community / European Commission)
Expert Review of Second-Order-Draft
Confidential, Do Not Cite or Quote
Response suggested by cochairs
Action
for
chapter
Considerations
by the writing
team
REJ; too much for SPM Agree with TSU
(1)
ACC; reformulate uncertainty
statement in caption
1 Noted but not
understood
(1)
TIA; See A-188 1 ACC
(1)
TIA; See A-188 1 REJ : redundant
(1)
TIA; See A-188 1 ACC
(1)
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