Biological and Environmental Sciences Climate Research Life Sciences

Biological and Environmental Sciences Climate Research, Life Sciences Vince Wayland

Contributions from: • Brian Hingerty Life Sciences

Climate Modeling

Climate Modeling • Current State • One Year Requirements • Two Year and Beyond Requirements

Current State • On going PCM runs, 4 cases concurrently, either 64 or 32 cpus • 5 100 year CCSM 3. 0 IPCC runs in progress, or starting REAL SOON NOW • Continuing additional CCSM 3. 0 runs

Current CCSM 3. 0 IPCC Tuning, Seaborg Capabilities • T 85 Atmospheric Resolution • Tot CPUs ATM cpus Syr/day Syr/cpu • 112 80 0. 97. 0084 • 128 80 1. 11. 0087 • 208 160 1. 57. 0076 • 608 512 2. 57. 0043 • Data courtesy G. W. Carr, Jr.

One Year into Future • Want to double resolution of ATM portion of CCSM 3. 0 (T 85 to T 170) • Horizontal resolution only, not vertical • >4 times atm computation – Gridpoints – Computation – Additional coupler load for interpolation and remapping in both directions to other components

One Year into Future, contd. • >4 times data transmission, storage, and post processing and Grid utilization • Looking at 320 ATM cpus, and 384(? ) total, just to keep current simulation rate • Possible increases in ATM code efficiency: – Separate physics and dynamics time steps – Reduced grid (fewer polar points)

Two years and beyond • Would like to quadruple CCSM 3. 0 ATM resolution to T 340 • WHY? ? • Desire to study regional climate – There are small-scale phenomena that affect regional climate that can only be represented by this resolution

Two Years and Beyond, cont’d. • But, use current model for estimation purposes • Even though possible with current ATM, probably will require different model including previous optimizations and (probably) new dynamical core. FV?

Two Years and Beyond, cont’d. • Therefore, need ~20 (4. 5 x 4. 5) times current performance for similar number of cpus – or trade offs using more cpus • AND, additionally, similar bump in: – Data Pipes (width and transfer rate) – Storage Capacity – Interconnects/switches

Life Sciences

Life Sciences • Brian provided a very nice set of science slides for cancer research using the DUPLEX Molecular Mechanics Program, but no quantitative computing resource requirements. • Can display on request, if time allows. • My bad for not having requested quantitative data in time.

The End