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Accepted, [James Crampton] 6-275 A 3:42 3:44 Variation in ENSO extremes says nothing about the impacts of ENSO outside the Pacific Accepted, will modify statement - poor logic here. [Andrew Lacis] 6-276 A 3:43 3:44 indicating that the impacts of ENSO are not stable as background climate and forcings Accepted, will modify statement change.

This balance of evidence sentence inappropriately plays down that result. [Andrew Lacis] 6-299 A 4:4 4:16 This is not particularly convincing. Noted [Jerry Mahlman] 6-300 A 4:4 4:5 While the 11th century temperatures for the reconstruction in question may be higher than Accepted the central estimate shown in the TAR, it is nonethelesss within the uncertainties in the TAR.

Replaced "understood" with have varied from glacial to interglacial times! "explored" [Andrew Lacis] 6-560 A 10:26 10:28 I would suggest starting this sentence with "Developing a quantitative understanding …" Accepted [Michael MacCracken] 6-561 A 10:27 10:28 makes no sense to me whatsoever - delete entirely Rejected.

With accepted positive feedbacks associated with altered orbital variations, anything is possible. [Andrew Lacis] 6-978 A 20:14 20:14 citation for "no global" anomaly accepted [Stephen McIntyre] 6-979 A 20:15 20:18 This seems a bit unlikely to me, as the sea level forcing of 3-4 m is rather small compared accepted with the >100 m of sea level rise that forced most of the WAIS deglaciation.

These provide a way of determining the uniqueness of current glacial melting, for the banded structure that has now been destroyed was evident in the 1970s and 1980s. [Andrew Lacis] 6-1057 A 22:35 line contains sentence that starts with a misplaced pronoun. "This reduces" Accepted Confidential, Do Not Cite or Quote Chapter 6: Batch AB (11/16/05) Page 129 of 222

Assessing the capability of models for future forecasts is one of the things that this chapter is supposed to be doing, and it does not help to avoid saying clearly when models are incapable of responding in a quantitatively realistic way. [Andrew Lacis] 6-1100 A 23:47 Change reference to Liu et al. Taken into account, changed as [Katsumi Matsumoto] indicated 6-1101 A 23:48 23:49 The “late summer and autumn warming of the surface ocean” can only decrease (not accepted enhance) land-sea (“temperature” is missing in the text) contrast.

Batch From To Comment Notes 10-138 A 4:3 4:3 Same as above. What is MOC? Noted. Executive summary has been [Andrew Lacis] re-written. 10-139 A 4:3 4:4 Better moved after line 15 Noted. Executive summary has been [Michel Petit] re-written. 10-140 A 4:3 4:4 This point might be placed after the first one concerning meridional circulation (same Noted.

prescribed with only crude dependence on ice thickness, snow cover, and puddling effects. [Andrew Lacis] 8-359 A 20:20 20:20 sea ice salinity is prognostic in GISS-ER and GISS-EH (schmidt et al 2004) Accepted. Text modified.

[Reto Knutti] 8-677 A 48:29 48:29 Supply date for Smith et al reference Accepted. Text modified. [Andrew Lacis] 8-678 A 48:29 48:29 Reference to Smith et al. The year of publication is to be filled in. Accepted. Text modified. [Philippe Tulkens] 8-679 A 48:29 Smith et al () missing ref.

the amplitude ot the diurnal radiative forcing [Joanna House] 7-591 A 14:46 14:47 The presence or absence of clouds is a key factor that has a significant effect on the Accepted - point made clearer in nighttime surface temperature. revision. [Andrew Lacis] 7-592 A 14:49 15:2 The DTR-aerosols connection should be in section 7.5.3.2. The DTR-deforestation In part rejected. To describe connection has to stay here, and both section should of course interact for the reader to get mechanisms of change over land, it is a consistent picture of what causes DTR changes. necessary to describe what is the [Pierre Friedlingstein] change of driver.