FULL TEXT Search

Hence, it is invalid to attribute any causes - “natural” or otherwise - to “the decadal air temperature anomalies for 1906-2005”. [Richard Courtney (Reviewer’s comment ID #: 49-21)] SPM- A 10:0 We suggest adding table TS-3, as it gives a very good overview of highly Not appropriate here; this is the attribution section 842 relevant recent findings (new since TAR) with regard to different factors contributing to observed SLR.

.” [Richard Courtney (Reviewer’s comment ID #: 49-20)] SPM- A 10:2 10:2 Is it just that it was widepread, or also that it is long-term/persistent warming?

Science vol. 284 p 92 (1999)). [Richard Courtney (Reviewer’s comment ID #: 49-6)] SPM- A 4:0 Better label bottom panel Bottom panel has been deleted. 244 [Dennis Hartmann (Reviewer’s comment ID #: 100-6)] SPM- A 4:0 Figure SPM-1.

Simply, (a) temperature measurements cannot indicate climate change in the absence of knowledge of their accuracy and precision, (b) coherence between data sets does not indicate their accuracy or precision, and (c) the accuracy and the precision are not known for mean global temperatures indicated by the GISS, GHCN and Jones et al. data sets, but (d) the known errors at grid box level indicate that it is not possible to use the GISS, GHCN and Jones et al. data sets for comparison of temperature trends over different geographical regions. [Richard Courtney (Reviewer’s comment ID #: 49-13)] SPM- A 6:48 6:49 could give the totals to compare with the earlier bullet line 38 Rejected.

The TAR said that since the industrial revolution, the build-up of human-caused greenhouse gases in the atmosphere has had a warming effect of only 2.4 W/sq m. [Richard Courtney (Reviewer’s comment ID #: 49-18)] SPM- A 10:1 10:1 Replace "greenhouse gas forcing" with "increases in human population, Rejected, see chapter 3 McKitrick & Michaels has 864 4 4 prosperity, energy usage and land-use changes".

“land” and “ocean”). [Richard Courtney (Reviewer’s comment ID #: 49-22)] SPM- A 11:1 11:6 Replace whole paragraph by "The contrast between land and sea is one of the Rejected.

Indeed, this paragraph concludes with a sentence that the “plausibility or likelihood” of simulations is not considered. [Richard Courtney (Reviewer’s comment ID #: 49-28)] SPM- A 11:4 11:4 Please replace "probabilistic" by "statistical".

Such agreement is only an indication that the models are converging towards similar behaviour, and this provides no confidence that they are converging towards the behaviour of the real climate. [Richard Courtney (Reviewer’s comment ID #: 49-33)] SPM- A 13:3 13:3 Consideration could be given to including drought and heatwave effects in this Accepted.

Indeed, it is hard to comprehend how “current understanding of climate processes” could be an important context for “climate stabilization for considering policy options that might lead to climate stabilization” when climate has never been stable and stabilization of climate is - to put it very mildly - ambitious. [Richard Courtney (Reviewer’s comment ID #: 49-35)] Confidential, Do Not Cite, Quote or Distribute SPM: Batch AB (08/24/06) Page 197 of 218

Indeed, the actual warming is not known but - on the basis of the radiosonde and MSU data - it seems most likely to have been less than 0.1 degrees C per decade from 1990- 2005 [Richard Courtney (Reviewer’s comment ID #: 49-30)] SPM- A 12:8 12:1 This paragraph ignores the fact that most of the warming took place prior to Rejected, see chapter 3 for discussion of temperature 1094 2 1998 and there has been no warming trend in the years since.