From gent at cgd.ucar.edu Thu Sep 6 09:24:26 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Thu, 6 Sep 2007 09:24:26 -0600 (MDT) Subject: [ccsm-scientists] Schedule for CCSM Scientist Meetings Message-ID: All, I've decided to postpone today's CCSM Scientist meeting at 11am. Several people are away, and there's not much new to talk about. The CSL Development and Production Proposals, and the 2007 Accomplishments Report will be submitted today. They will be available on the CCSM web site very soon. Thanks to all WG Cochairs for their hard work writing these proposals and report. I've rescheduled the next two CCSM Scientist meetings: 9/11/07, Tuesday, 3:30pm (No Seminar) 9/26/07, Wednesday, 11am 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 one of the 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 Tue Sep 11 13:39:44 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Tue, 11 Sep 2007 13:39:44 -0600 (MDT) Subject: [ccsm-scientists] CCSM Scientist Meeting Message-ID: All, There is a CCSM Scientists meeting today at 3:30pm in the Damon Room. 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. Run 2) is complete - b35.008 out to 100 years, and run 3) is b35.009 out to 60 years. See the results on http://swiki.ucar.edu/ccsm/110 Cheers, Peter. 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 one of the 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. From klindsay at ucar.edu Fri Sep 21 10:38:27 2007 From: klindsay at ucar.edu (Keith Lindsay) Date: Fri, 21 Sep 2007 10:38:27 -0600 (MDT) Subject: [ccsm-scientists] running CCSM's long-term archiving script on CISL's IBM's Message-ID: Hi, If you don't run CCSM on CISL's IBM machines, please disregard this message. If you know of people that do run CCSM on CISL's IBM machines and are not on the ccsm-progs and ccsm-scientists lists, please forward this message to them. CISL upgraded the batch system on their IBM's this week. Since then, CCSM's long-term archiving script has failed to run when submitted from within the main job script. Curiously it does run when you submit it from the command line. Working with Siddhartha Ghosh in the CISL consulting office, we have determined the cause of the archiving script failure and determined a work-around. The work-around is to add the line unsetenv LSB_PJL_TASK_GEOMETRY to your .run script just prior to where the .l_archive script is being submitted. Sidd is trying to determine if the systems can be setup in a way that makes this work-around unnecessary. Until then though, the work-around appears to work. A bit more info: The environment variable LSB_PJL_TASK_GEOMETRY was apparently causing problems because its previous setting, which is there to specify the layout of the parallel CCSM onto CPU's, was conflicting with the single task/thread specification in the preamble of the .l_archive script. This conflict is causing the .l_archive script to not run. This behavior that this conflicts leads to the .l_archive script failure seems to be a new feature of LSF. Thanks, Keith -- ****************************************************************** Keith Lindsay http://www.cgd.ucar.edu/oce/klindsay/ email: klindsay at ucar.edu phone: 303-497-1722 fax: 303-497-1700 From gent at cgd.ucar.edu Wed Sep 26 09:30:14 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Wed, 26 Sep 2007 09:30:14 -0600 (MDT) Subject: [ccsm-scientists] CCSM Scientist Meeting Today Message-ID: All, There will be a CCSM Scientists meeting today at 11am in the Damon Room. We will talk about the latest CCSM 3.5 coupled run b35.010, and forcing datasets for the 20th Century run, Cheers, Peter. 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 one of the 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. From gent at cgd.ucar.edu Wed Sep 26 09:30:14 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Wed, 26 Sep 2007 09:30:14 -0600 (MDT) Subject: [ccsm-scientists] CCSM Scientist Meeting Today Message-ID: All, There will be a CCSM Scientists meeting today at 11am in the Damon Room. We will talk about the latest CCSM 3.5 coupled run b35.010, and forcing datasets for the 20th Century run, Cheers, Peter. 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 one of the 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. From gent at cgd.ucar.edu Thu Sep 27 09:38:25 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Thu, 27 Sep 2007 09:38:25 -0600 (MDT) Subject: [ccsm-scientists] CCSM Scientist Meeting Schedule Message-ID: ---------- Forwarded message ---------- Date: Wed, 26 Sep 2007 16:11:36 -0600 From: Barbara Ballard To: PETER GENT Subject: CCSM Scientist Meetings Peter, I have scheduled the Damon Room as follows for these meetings: Wednesday, 31 October - 1:30 - 3:00 Monday, 26 November - 1:30 - 3:00 Monday, 10 December - 1:30 - 3:00 Thursday, 20 December - 10:30 - 12:00 Neither 11/12 or 11/14 are available. Thanks, Barbara From gent at cgd.ucar.edu Thu Sep 27 10:28:28 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Thu, 27 Sep 2007 10:28:28 -0600 (MDT) Subject: [ccsm-scientists] Revised CCSM Scientist Meeting Schedule Message-ID: ---------- Forwarded message ---------- Date: Thu, 27 Sep 2007 10:23:32 -0600 From: Barbara Ballard To: PETER GENT Subject: Re: CCSM Scientist Meetings Peter, Here is the revised schedule...all in the Damon Room: Monday, 29 October - 10:30 - 12:00 Monday, 26 November - 1:30 - 3:00 Monday, 10 December - 1:30 - 3:00 Thursday, 20 December - 10:30 - 12:00 I'll post these to CCSM Scientist's meeting maker. Thanks, Barbara From gent at cgd.ucar.edu Thu Sep 27 11:06:28 2007 From: gent at cgd.ucar.edu (PETER GENT) Date: Thu, 27 Sep 2007 11:06:28 -0600 (MDT) Subject: [ccsm-scientists] FINAL CCSM Scientist Meeting Schedule Message-ID: All, Third time lucky to avoid other conflicts - sorry !! Here is the revised schedule; all in the Damon Room: Wednesday, 31 October - 10:30 - 11:30 Monday, 26 November - 2:00 - 3:00 Monday, 10 December - 2:00 - 3:00 Thursday, 20 December - 11:00 - 12:00 Cheers, Peter. From thornton at ucar.edu Thu Sep 27 12:44:39 2007 From: thornton at ucar.edu (Peter Thornton) Date: Thu, 27 Sep 2007 12:44:39 -0600 Subject: [ccsm-scientists] [Fwd: CCSM land model results] Message-ID: <46FBFA17.60207@ucar.edu> Hello all, I am forwarding a request from Andy Jacobson, a colleague at NOAA. I think it would be useful to both CCSM and NOAA if Andy could begin looking at land carbon fluxes from one of our recent coupled pre-industrial control simulations (e.g. b35.010). His work is in an exploratory phase, and I would ask that he check back before publishing any results. Please let me know if you have objections or comments. I'll wait until the CCSM scientists have a chance to respond before proceeding. Thanks, Peter T. -------- Original Message -------- Subject: CCSM land model results Date: Thu, 27 Sep 2007 12:15:39 -0600 From: Andy Jacobson To: Peter Thornton Hi Peter, As you know, I am working with the NOAA CarbonTracker system. Although CarbonTracker currently uses a CASA-GFEDv2 land flux hindcast, we've designed the system to plug-and-play with fluxes predicted by other external sources, like the CCSM land surface model. I'm very interested in evaluating the potential of atmospheric CO2 data to discriminate between the various scenarios represented by contemporary estimates of tropical land NEE. Your model's nitrogen limitation scheme is of particular interest to me, as it will likely present a different picture of vegetative response to increased atmospheric CO2 loading. I am also interested in climatic response, especially to changes in the hydrologic cycle as represented by coupled atmosphere-land models. I therefore would like to propose a modest collaboration. If you could share some land surface model fluxes with me, I could start by propagating their implied flux anomalies (from transient events like ENSO, and from secular trends due to global warming) through our system to evaluate the extent to which these events are "visible" from atmospheric CO2 mixing ratio data. I realize that you can do this already using NCAR models, but I'd like to point out the value of having a second opinion. We offer a couple of potential advantages, including different base transport (ECMWF meteorology), high-resolution transport simulations in selected regions using nested two-way grids, and careful model sampling to represent observations from the surface flask network, tall towers, aircraft, TCCON (OCO) FTS network sites, CarboEurope data, eddy flux estimates, and satellite sensors. Among the results we could anticipate is an estimate of the "detection horizon" for anthropogenic flux perturbations: the projected date at which trends in your model flux should emerge unambiguously from background variability, as seen by the atmospheric CO2 record. Best Regards, Andy -- Andy Jacobson andy.jacobson at noaa.gov NOAA Earth System Research Lab Global Monitoring Division 325 Broadway Boulder CO 80305 303/497-4916 -- Peter Thornton Scientist, Terrestrial Sciences Section Climate and Global Dynamics Division National Center for Atmospheric Research thornton at ucar.edu http://www.cgd.ucar.edu/tss/staff/thornton (303) 497-1727 (voice) (303) 497-1695 (fax)