1. CCSM/RACM Update May 18 2010

2. CCSM Schedule April 1, 2010, CCSM4.0 Release June 15, 2010, CESM1.0 Release – adds ecosystem + glc (glimmer) + ? June 28 – July 1, CCSM Workshop, Breckenridge, CO

3. New Tags CCSM4_0_RACM01 to RACM05 – prior tags Since April 1, 2010 – CCSM4_0_RACM10 – Update RACM code to “CCSM4.0” Release Version – CCSM4_0_RACM11 – Update POP to include extended grid mods from Jaromir, Add wrf configure file for pingo – CCSM4_0_RACM12 – Update VIC from Chunmei Testing on midnight and pingo

4. Notes on Current Tags Compsets – H = datm, slnd, pop, cice – RB = wrf, vic, pop, cice – RI = datm, vic, socn, sice – RJ = wrf, dlnd, pop, cice – RK = wrf, vic, docn, dice – RL = wrf, dlnd, docn, dice Grids – w5a_w5a (RI, RK, RL compsets) – w5a_a92 (full extended grid; RB, RJ compsets) – a91_a91 (for H compsets) partial coupling and pop/cice wind stress reduction (ala J.He) is turned off by default.

5. Upcoming Work/Issues Update WRF3.0.1 to WRF3.2 – verify physics New POP/CICE grid – mapping files – land model mask Coupled Tuning – initial spinup – stable simulation – “correct” simulation Migrate to pingo Performance Assessment, Optimization, and Load Balance Verify exact restart and production capability

6. CCSM WRF/Regional Grid Plans No definite plans yet Other communities are starting to use the RACM version to explore CCSM/WRF coupling Need to improve WRF integration in CCSM – build/scripts Expect to add ROMS as a supported ocean model (over the next couple years) Nested CAM/WRF, POP/ROMS?