28. Line 790 should also refer to Robock and Oppenheimer (2003), which looks more at circulation patterns. There is a paper in that book by Jones et al. (2003).

29. Lines 800-802 states, “At constant relative humidity, water vapor is expected to increase nonlinearly with temperature (Soden et al., 2002).” Water vapor does increase nonlinearly with temperature at constant relative humidity. This is just the Clausius-Clapeyron equation. If a reference is cited it should be to Clausius and Clapeyron.

30. In line 808, ocean temperature data has very ambiguous implications as noted in Lindzen and Giannitsis (2002).

31. More discussion should be provided in line 811 about the widespread and accelerating glacial retreat. It is those mountain glaciers in low and midlatitudes that are melting systematically. This is a terrific proxy measurement because the mountain glacier melting is unprecedented in modern history and is now happening within the lower atmosphere that is a primary focus of this report. The report needs to point out that just glaciers that respond to summer temperatures are retreating. Many glaciers that respond to winter precipitation are advancing.

32. Trends are influenced by ozone, greenhouse gases, aerosols, etc. In addition to addressing combined forcings in lines 849-863, also discuss the response of the model to each of the forcings individually and the uncertainties in the various forcings.

33. Volcanoes and ENSO do not make much difference to the trend. As these series are now slightly longer than earlier studies so that they no longer end with a major (1997-1998) ENSO event, the points about volcanoes and ENSO could be removed. There could be a brief discussion in lines 865-881 or preferably earlier regarding their effects.

34. The section in lines 903-910 should be more explicit in saying which of the various components contribute separately to the agreement. It should also be more explicit about exactly which forcings are included in the “all” integration.



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