Old news

Jan 28, 2010: Rick Slater's spinup continues, now out an additional 1145 y. CM2Mc is also now running on the Australian national supercomputing facility, and is being installed at the Canadian SciNet facility. Go commonwealth!

Nov 9, 2009: The code was updated to the quebec release, and the control run of CM2Mc is continuing as of a few weeks. This run is now under the tender care of Rick Slater, and output is located on the GFDL archive, here:

/archive/rds/Quebec/CM2Mc_Control_spinup-1900A/

For more information on the run, and sample output, see CM2Mc preindustrial control run.

June 6, 2009: Tried altering neutral physics at year 400 of CM2M-coarse_090406_interactive slightly, to get more AABW forming, run _asp1. Reduced agm slope from .12 to .1. Worked like a charm. This will be the control run, called CM2M-coarse_090406_interactive_asp1.

May 17, 2009: The interactive chlorophyll run is now the only run underway, intended to be the control run. AABW formation

continues to be weak, and sporadic.

May 2, 2009: A new executable was generated to incorporate BLING and ibgc updates. A new experiment was started, using this, contiuing on from year 864 of the aredi800 run. This new run is in

/archive/edg/perth_2008_10/CM2M-coarse_090406

There is also a new run, starting today, with interactive chlorophyll, in which the chlorophyll field generated by BLING is used to calculate shortwave absorption. This run starts from year 200 of the previous run, and can be found in

/archive/edg/perth_2008_10/CM2M-coarse_090406_interactive

April 19, 2009: It was decided that the gmmax800 run was not clearly superior to the aredi800, nor was the original bathymetry, although both had their advantages that are worthy of further thought. For the time being, the aredi800 run will be continued as the new control case, and will be documented as CM2Mc.1.

April 7, 2009: The aredi800 run was extended to 800 years. Analysis showed strong El Nino activity and consistent NADW formation. However, N Pacific stratification remained very weak, and no bottom water was forming in the Southern Ocean. After some analysis of multiple long (>500y) runs, it was decided to cap the GM coefficient (agm) at a value of 800. This run, CM2M-coarse_090201_gmmax800 is now underway at 60y. Also, another run, CM2M-coarse_090201_oldgrid was started to make a clean, <80y-long comparison of the original bathymetry (om1p7a) with the one under use since last August (om1p7p).

Mar 8, 2009: After 200 years of simulation, the constant aredi value of 800 was determined to have a much better Nino3 variability spectrum than the other versions, except for the 1200, which had a total breakdown of the subarctic Pacific halocline. The 800 run has a weak subarctic Pacific halocline, but this may actually be in keeping with the atmospheric bias? NADW is, unfortunately, too saline in this run as well. This run is now out >500 years.

Feb 1, 2009: New base version, using MDPPM instead of SWEBY for ocean temperature and salinity advection. Added crossland mixing to allow Amur freshwater out of Japan Sea and into Kuroshio. Lowered minimum agm/aredi, increased scaling. Testing alternative neutral mixing (high constant aredi, 800 and 1200). Output of these runs can be found in:

/archive/edg/perth_2008_10/CM2M-coarse_090201

/archive/edg/perth_2008_10/CM2M-coarse_090201_aredi800

/archive/edg/perth_2008_10/CM2M-coarse_090201_aredi1200

Jan 28, 2009: 500-yr simulation presented to OMDT (model run CM2M-coarse_081224). General metrics good, high latitude water masses reasonably simulated. Major problems: hyperventilation of North Pacific intermediate water, cold bias in equatorial Pacific SST compromising tropical simulation.

Jan 1, 2009: The model is now running with the perth_2008_10 codebase. A long 1860 control run is underway.