From gent at cgd.ucar.edu Tue Aug 7 09:49:54 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Tue, 7 Aug 2007 09:49:54 -0600 (MDT) Subject: [ccsm-scientists] CCSM Scientist Meeting - Today at 11:15am Message-ID: We've scheduled the next few CCSM Scientist meetings. And, as always, you'll find invitations on your Meeting Maker calendars. 8/7/07, Tuesday, 11am For the conference call: * Dial in to either of these numbers: 1-800-516-9896 or 1-816-650-0725. * When prompted, enter participant code 373971. You will be placed on hold until the chairperson begins the call. All, Several of us are in a meeting that is scheduled to end at 11am. So, the CCSM meeting won't start until 11:15am and will be short. We will mostly discuss getting jobs through the NCAR computers, Cheers, Peter. From gent at cgd.ucar.edu Thu Aug 23 10:46:42 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Thu, 23 Aug 2007 10:46:42 -0600 (MDT) Subject: [ccsm-scientists] CCSM Scientist Meeting 2pm Message-ID: All, There will be a CCSM Scientist meeting this afternoon at 2pm in the Damon Room. We will talk about the latest CCSM 3.5 integrations := g35.001 Ocean and ice forced by output from f35.amwg.002 b35.007 Fully coupled run with ocn/ice ICs from g35.001 Results can be found on http://swiki.ucar.edu/ccsm/110. For the webcast (if needed): * Open a java enabled web-browser. Mozilla based browsers are best (i.e. Firefox, Netscape, Mozilla). * Go to the following URL: http://whiteboard.cgd.ucar.edu * Type in the password "irac96%#" without the quotes. For the conference call: * Dial in to either of these numbers: 1-800-516-9896 or 1-816-650-0725. * When prompted, enter participant code 373971. You will be placed on hold until the chairperson begins the call. Cheers, Peter. From gent at cgd.ucar.edu Fri Aug 24 14:47:41 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Fri, 24 Aug 2007 14:47:41 -0600 (MDT) Subject: [ccsm-scientists] Summary of CCSM Meeting Message-ID: All, I thought I would summarize yesterday's CCSM scientists meeting := a) The ocean + ice g35.001 run went for 80 yrs, forced by output from f35.amwg.002 atmosphere + land run, which was very well balanced at TOA. Over the 80 yrs, the ocean is gaining heat at a rate of ~ 0.32 W/m**2, and the volume of Arctic ice decreases by about 4-5% over the 80 yrs. b) The b35.007 fully coupled run, which started with ocean + ice ICs from the end of the g35.001 run, had gone 80 yrs (now gone to 100 yrs). Now the ocean is losing heat at rate ~ -0.38 W/m**2, and this rate looks very constant over time. The Arctic ice volume increases a lot, ~ 33%, from the IC over the first 40 yrs, and then is ~ statistically steady. So, the Arctic ice volume goes the wrong way in the g run, but the 40 year equilibration time is much shorter than the 100+ yrs had in CCSM3. After a lively discussion, there were suggestions for further runs := 1) Another f run using the SST and ice extent from the coupled b run. Does this account for the -0.38 W/m**2 inbalance in the coupled b run? 2) Another b run starting with the default ocean and ice ICs used in the g run. Will the Arctic ice volume equilibrate in 40 yrs? If so, is an ocean + ice g run needed in the spin up procedure? 3) Tune the atm parameters to correct a -0.38 W/m**2 TOA inbalance. Rerun the b35.007 run, and hope that it will now be balanced at TOA. 4) Do a 20th century run from the b35.007 run to look at 2000 climate. Cheers, Peter.