Since IGC7: High-Performance GEOS-Chem (GCHP) and Flexible Chemistry (FlexChem)

M. Long, S. Eastham, J. Zhuang, R. Yantosca, M. Sulprizio, E. Lundgren R. Martin – Dalhousie University

B. Auer, M. Thompson – NASA-GMAO

Since IGC7:

1: FlexChem – brought online in late 2016 (v11-01c)

2: KPP – re-established development

3: GCHP – scientific validation; vast capacity

4: Continued Deployment in GCMs – Beijing Climate Center (LU Xiao, PKU) 5: NASA/GEOS-5 OSSE “Nature Run” – L. Hu, C. Keller, GMAO

FlexChem:

1: Adaptable to mechanism change development

2: More computationally and resource efficient

3: Establishment of KPP development for GC-specific apps

GCHP:

1: High-performance MPI-based capacity

2: Built directly atop current GEOS-Chem

3: Straight-forward Transition from Laptop to HPC

4: Easy transition across horizontal resolutions

GCHP: Scientific Validation

GCHP: Performance (c24)

GCHP: Performance (c180)

GCHP: The Future

Currently Limited by the Met Field Archive

GCHP: The Future

Maintain seamless compatibility with GEOS-5

Address usability from head to toe

Make core & interface as generic as possible.

Continue focus on performance.

GCHP: The Future - What has not been done & what needs to be?

--- Revamp I/O --- Benchmarking at high(er) resolution and in within GEOS-5 online --- Establish and begin using a cube-sphere met archive --- Specialty Simulations - Emphasis: Buy-in from the community critical to advancement. - Emphasis: Many new avenues for science readily available (e.g. process-sensitivity to resolution)

GCHP: http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_HP

ASK US QUESTIONS THROUGHOUT THE MEETING!