cc: jwillebrand@ifm-geomar.de, Brian Hoskins , Martin.Manning@noaa.gov, Susan Solomon , Matilde Rusticucci , Phil Jones , Nathan Bindoff , zhenlin chen , Melinda Marquis date: Fri, 12 Jan 2007 09:49:18 -0700 from: Kevin Trenberth subject: Re: IPCC WG1 Observations ppt to: Peter Lemke Hi Peter I am a bit alarmed about all of these slides as being too complex and not using material from the chapters enough. For instance Fig 4.13 I found easy to understand but your first slide is not easy: why is Europe in blue going up in a and level in b when the glaciers are retreating? The reason is because this shows the rate of change not the result of the change isn't it? In your second slide I do like the Larsen B ice shelf picture and that provides a nice back drop for some explanation of the new bullet (which is good). But why include the 3 panels on the left? What do they add? I am not sure the next two are needed especially in their current form. None of these are in the chapter. They add too much new material. In my last ppt version I added some place holders taking some figures from the chapter as they are part of the picture that "global warming is unequivocal". I would urge you to include the first two I had, plus one of yours based on the Larsen B slide but with the message from the bullet added, or something like that. Regards Kevin Peter Lemke wrote: > Dear Colleagues, > please find enclosed a ppt-file addressing issues of Chapter 4. > Slide 1: addresses SPM-312 and 314. I suggest to accept 312. The > figure (4.15 from the chapter) indicates an increased rate of change > after about 1990. But I do not think that we have an indication of an > acceleration (continuously increasing rate of change). > Slides 2,3 and 4: address the increased flow speed of tributary > glaciers after retreat/thinning/loss of ice shelves or floating > glacier tongues in Antarctica and Greenland (comments SPM-349 to 353) > > I did not find any critical comments concerning snow, sea ice and > frozen ground. Therefore I did not prepare any slides for theses topics. > Best regards, > Peter > > ************************************** > Please note my new e-mail address: > > Peter.Lemke@awi.de > > ************************************** > Prof. Dr. Peter Lemke > Alfred-Wegener-Institute > for Polar and Marine Research > Postfach 120161 > 27515 Bremerhaven > GERMANY > > e-mail: Peter.Lemke@awi.de > Phone: ++49 (0)471 - 4831 - 1751/1750 > FAX: ++49 (0)471 - 4831 - 1797 > http://www.awi.de > ************************************** -- **************** Kevin E. Trenberth e-mail: trenbert@ucar.edu Climate Analysis Section, www.cgd.ucar.edu/cas/trenbert.html NCAR P. O. Box 3000, (303) 497 1318 Boulder, CO 80307 (303) 497 1333 (fax) Street address: 1850 Table Mesa Drive, Boulder, CO 80305