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Text modified [William Howard] 6-1490 A 33:42 33:43 As for the following description, "However, the relationship between sunspot numbers Noted. and solar magnetic field is not fully understood," a report of Itoh will give a further insight (K. Itoh, "A novel empirical relation between the aa index and sunspot numbers: theoretical considerations and applications," Japan Geoscience Union Meeting 2001, En- P001 (http://www-jm.eps.s.u-tokyo.ac.jp/2001cd-rom/pdf/en/en-p001_e.pdf).

Suggestions along this line will show the direction of future climate researches, and worth to note somewhere in the report. [Kiminori Itoh] 2-54 A 0:0 The authors have worked hard to put together a well-balanced draft. I enjoyed reading it Thanks from the first line to the end [Fortunat Joos] 2-55 A 0:0 I was surprised to see the over-emphasis on Concept of ‘RF (Radiative forcing)’ in Partially accepted.

Will be changed [John Church] 5-1203 A 86:5 I feel strange to see a future projection in Figure 1 because the chapter is discussing Sea level box is in collaboration with observations. chapter 10 [Kiminori Itoh] 5-1204 A 86:7 Q 5.1, Fig. 1 Fix typo: Chpater -> Chapter. Ok [Melinda Marquis] Confidential, Do Not Cite or Quote Chapter 5: Batch AB (11/16/05) 151 of 152

[Katherine Hayhoe] 11-18 A 0:0 I feel strange that there is no representation on "soot" which can give tremendous effect Noted: some additional discussion on regional climate. added (LAs and CLAs) [Kiminori Itoh] 11-19 A 0:0 The chapter is written very nicely, taking into account most of the important achievments Noted, editorial action taken (CLAs).

In this case, of course (and unfortunately), issue is given in Chapter 9 the model calculations shown in Figure 6.10 cannot be relied on. [Kiminori Itoh] 6-1501 A 34:10 34:11 Also state Solanki results Noted. [Stephen McIntyre] 6-1502 A 34:12 34:12 "the radiative forcing used in Chapter 9" : replace with "the magnitude of the radiative Accepted.

Expert Review Comments on First-Order Draft (16 November 2005) IPCC Working Group I Fourth Assessment Report Page:line No. Batch From To Comment Notes [Kiminori Itoh] 9-388 A 15:24 It is not clear how the peresented results were obtained. The description of the experinet These descriptieons are in the original should be slightly extended to explain what forcing has been applied, what ozone changes papers.

Akasofu points out, due to the changes in the ocean currents, the mechanism suggested by conventional models (ice- snow feedback) is neither plausible nor convincing. [Kiminori Itoh] 9-1091 A 52:52 52:53 may … to some extent" too weak: "will … to some extent" or just "may Accepted [William Ingram] 9-1092 A 52:53 Delete “quantitative” Reject.

Expert Review Comments on First-Order Draft (16 November 2005) IPCC Working Group I Fourth Assessment Report Page:line No. Batch From To Comment Notes grid makes it minor. [Kiminori Itoh] 6-799 A 16:23 :38 The answer is "No we cannot predict the transitions out of interglacials and into ice ages" Noted, headline will be changed to say Yes model results are more promising but we do not have a fully coupled dynamical earth Do we understand..., text of paragraph system model that successfully simulates either of the transitions.

They show a large temperature fluctuation in Canada, and claim that latewood density is better than tree-ring width to reproduce the past climate. [Kiminori Itoh] 6-1351 A 29:20 29:22 The non-independence should be discussed. This includes non-independence of authors Rejected - the data series are discussed and more detailed discussion of non-independence on proxy series. and point on authors not valid.

Thus, the sentence, "However, very rapid and apparently unprecedented melting of tropical ice caps has been observed in recent decades, possibly linked to sharply rising SST observed in the tropics after 1976 as well as enhanced warming at high elevations." is not correct for Kilimanjaro. [Kiminori Itoh] 6-1396 A 31:11 31:13 Oxygen isotope series from high-elevation ice cores provide the longest records, but most Rejected - not considered of sufficient represent changes in the source region of precipitation, as well as local temperature. : this import to justify should be carried forward to proxy uncertainty summary.