1. CESM-CAM5 Large Ensemble Update May 13, 2013 https://wiki.ucar.edu/display/ccsm/CESM+Large+Ensemble+Planning+Page E-mail list for all future updates - Please sign yourself up at: http://mailman.cgd.ucar.edu/mailman/listinfo/cesmcam5_lrgens http://mailman.cgd.ucar.edu/mailman/listinfo/cesmcam5_lrgens

3. Control Run – Surface temperature and TOA Balance through year 400

4. Control run ocean temperature

5. CESM1.1 (1 degree) 400-year Control Run 1)ENSO 2)PDO 3)AMO 4)Sea Ice 5)SLP variance

6. SST monthly anomaly standard deviation

7. 5n-5s, 170w-120w Nino3.4

8. 1.06C in CCSM4 0.98 in CESM1.1 0.76 in OBS

9. Nino3.4 SST power spectrum

10. Nino3.4 SST standard deviation: 30-year running window OBS

11. Nino3.4 monthly standard deviation

12. SST anomaly composite Hovmuller Diagrams time

13. DJF Surface Temperature and SLP Composites (ENSO)

14. PDO (Regressions on PC1 North Pacific SST’)

15. AMO (Regressions on North Atlantic SST)

18. DJF SLP standard deviation (hPa)

19. Outputs/Storage on HPSS -DATA STORAGE. We requested 300 TB. We were allocated 80% (of CSL request) and 80% (of HPSS request) leaving us with 192 TB. -Zipping files before archiving saves a lot of space! Compression factors for history files: ~0.64 (CAM), ~0.41 (POP), ~0.21 (CLM), ~0.17 (CICE). - For 30 ensemble members: 168 TB of zipped output proposed. 1) Monthly Means Continuous 1920-2080 2) Daily Means Continuous 1920-2080 3) 6-hourly Timeslice for Three Decades – 1920s, 1990s, 2070s? (At the meeting –timeslice outputs were requested to be saved for the 1990s, a near-term decade (2025- 2034), and the 2070s. We will adopt this request.) See spreadsheet on the wiki for a list of the variables. CESMLargeEnsemble_highfreqvars_sizes_may13.xls -With 30 ensemble members, there is not enough storage to archive both monthly history files and single variable timeseries on HPSS. Proposal: Save both for first ensemble member. Is it ok to only archive single variable time series and a limited number of monthly mean climatologies? What will make this ensemble the easiest to use for the community? Discuss

20. Outputs By Type

21. Run Cost/# Ensemble Members -CORE HOURS. We requested 6.5 million Yellowstone core-hours. We were allocated 80% or 5.2 million. -Model Cost: 2163 pe-hrs/simulated_year (per Andy Mai based on 1850 control). Only enough resources for 15 ensemble members 1920-2080 with CSL Resources? -Additional ensemble members to be added by community (Texas, Toronto, Colorado?). Instructions provided after first ensemble member run all the way through 2080. Discuss