Possible Strategic Capability Projects

1. Possible Strategic Capability Projects • High resolution coupled simulation: (ASD) • 1/8o CAM, 1/10o POP, 20 years (initially) • SCIDAC proposal: Small, Bryan, Tribbia, Dennis, Park, Tomas, Niklas Schneider, Young-Oh Kwon, Saravannan • Coupled intra-seasonal (seasonal) forecasting • 0.25 CAM nudged to analyses; • focus on MJO and it’s 1-2 week impact on western US • Rich Neale and Julie Bacmeister • High resolution WACCM run: • 1/8o, 0.5-1km vertical resolution (150-300 levels); • 1 year runs for 3 cases (solar max, min, medium) • Hanli Liu, WACCM group • Simulations to produce a fully coupled data assimilation product for 1960-2007 • 1-degree CESM • GokhanDanabasoglu, Joe Tribbia, Alicia Karspeck, DART group

2. CSL Proposal • CSL = 28% of Yellowstone (~250 million core-hours over the 18-month allocation) • For current CSL, CESM has ~68% of resources • If keep same target, then ~175 million core-hours for CESM. About 20X the current CSL(?). • Possibly argues for some big, high-level, across-WG projects • Large Ensemble Integrations?, • High(er)-Resolution Controls?, • Long Control Integrations with CESM1.5? • Additional resources for WG development/production efforts

3. CSL Proposal Current Resource distribution across working groups Could keep same percentages - acknowledging CV and CC merger, SDWG Modify based on use or community needs/interest?

4. CSL Proposal Possible Large Across-WG Projects? • Large Ensemble Example • CESM(CAM5) 1-deg costs ~1930 GAU/year with a data volume of 26.4 GB/year • 1 core-hour on Yellowstone equivalent to 2.15 GAUs (?) • CESM(CAM5) 1deg = ~900 core-hours/year (?) • 50 ensemble members from 1900-2099 equals ~9 million core-hours (~5% of request) • Could also perform ensemble runs with WACCM, FASTCHEM, BGC for comparison? • (what if ~20% of total request committed to across WG projects? Still have ~15Xs current CSL allocation)

5. CSL Proposal • CESM1.5 control runs • CAM5 – 1deg = 1930 GAU/yr (900 core-hour/year) • Assume computational increase (1000 core-hour/yr) • Assume 1000 year run • ~1 million core-hours

6. CSL Proposal • For NWSC, proposals due Feb 15, 2012 • Proposed Timeline: • January 6: Drafts of Working group reports and past accomplishments • undergoes cross-referencing and refinement • January 13: Final WG drafts available • January 25: SSC proposal draft due • Comments from WGs back by Feb 3 • Feb 8: Final draft available • Feb 14: Proposal submitted

7. Justifying resource needs • HPC — similar to current practice • Cost of runs necessary to carry out experiment, supported by benchmark runs or published data • DAV — will be allocated, similar to HPC practice • A “small” allocation will be granted upon request • Allocation review to focus on larger needs associated with batch use • Memory and GPU charging to be considered • HPSS — focus on storage needs above a threshold • 20-TB default threshold initially • Perhaps lower default for “small” allocations” • CISL to evaluate threshold regularly to balance requester/reviewer burden with demand on resources • Simplified request/charging formula • GLADE — project (long-term) spaces will be reviewed and allocated • scratch, user spaces not allocated (Courtesy of David Hart, CISL)

8. Working Group Template • Research Plan and Broad Overview Objectives (1page) • Development Objectives (1 page) • Coupling across components and understanding interactions • New parameterizations/processes • High-resolution and new dynamical cores • Addressing biases/shortcomings • Software development • Production Objectives (1 page) • Coordinate modeling and assessment activities • Benchmark simulations • Climate variability and predictability • Proposed Experiments and Computational Requirements • Development Experiments (with Table) • Production Experiments (with Table) Table Example