date: Fri May 20 12:57:27 2005 from: Phil Jones subject: Re: CCSP meeting: confidential to: Kevin Trenberth , jhurrell@ucar.edu Kevin, Jim, Heard the news also from Ben and Chris at the HC Review meeting. Tom Peterson also emailed me to say that Roy deserves credit. I won't be doing any crowing, but it would be useful to find out what UAH plan to do re a new publication/note. I'll contact John and see what I can find out. Should certainly make the section of Ch 3 a lot easier to write. Cheers Phil At 16:12 17/05/2005, Kevin Trenberth wrote: Thanks Jim Another typical UAH response though: every time we found something, they changed the dataset so they could argue our findings were no longer relevant, but they did not ever take care of the issues. Can I share this with a couple of others on our chapter: in particular David Parker is an author, but is not at your mtg. Kevin jhurrell@ucar.edu wrote: Dear Kevin and Phil, Sitting in the CCSP meeting, but I wanted to let you know of what I believe is really remarkable progress. And I give much credit to Roy Spencer. He has admitted UAH Tlt has a negative bias, accepting the RSS argument the diurnal cycle correction is of the wrong sign. He also has stated the Fu technique is "acceptable" especially given the notion of 1000-200 T as opposed to 850-300. The revised CCSP report will have much more on Fu, and also a new UAH Tlt product. The latter also means IPCC FAR draft will need to be revised to include the new product. Roy thinks it can be done in about 2 weeks. The scientific issue of just how to do this is still up for debate. RSS has based the diurnal cycle corrections on CCM3; UAH will do it based on AMSU data. Whether their redo will result in a +.2C/decade correction (as implied by Mears et al.) in the tropics, or something smaller, will depend on this. But that it will move Tlt to a warmer trend is not in doubt. Just a quick update. More when I return. Jim -- **************** Kevin E. Trenberth e-mail: trenbert@ucar.edu Climate Analysis Section, NCAR [1]www.cgd.ucar.edu/cas/ P. O. Box 3000, (303) 497 1318 Boulder, CO 80307 (303) 497 1333 (fax) Street address: 1850 Table Mesa Drive, Boulder, CO 80303 Prof. Phil Jones Climatic Research Unit Telephone +44 (0) 1603 592090 School of Environmental Sciences Fax +44 (0) 1603 507784 University of East Anglia Norwich Email p.jones@uea.ac.uk NR4 7TJ UK ----------------------------------------------------------------------------