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Direct Model

Direct Model. (Miehe et al., 2002). Optimization Approach. (Sandu et al., J. Computational Physics , 2005). #3. #2. #1. CO 2 Direct Model. CO 2 Optimization . Adjoint Performance. Results Speed-up efficiency > 50% for parallelization RMS error reduction > 90% of prior error

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Direct Model

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  1. Direct Model (Miehe et al., 2002)

  2. Optimization Approach (Sandu et al., J. Computational Physics, 2005)

  3. #3 #2 #1 CO2 Direct Model

  4. CO2 Optimization

  5. Adjoint Performance Results • Speed-up efficiency > 50% for parallelization • RMS error reduction > 90% of prior error • CPU time <1 minute per hour of simulation (simulation integration step 15 min) Algorithmic/Software Improvements Needed • Reduce overhead through parallel I/O • Confounding factors: biosphere

  6. A Biosphere Tracer: COS (Campbell et al., Science, 2008)

  7. Cost Function Error (Campbell et al., In Prep)

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