Overcoming the challenges of increasing resolution and complexity in GEOS

Abstract

<p>The NASA Global Earth Observing System (GEOS) model supports an array of complex Earth system simulation and assimilation capabilities.<span>&#160; </span>These range from simple development frameworks such as dry atmosphere dynamics and single column physics cases, to fully coupled atmosphere-ocean-land-cryosphere-chemistry. Efficient use of available computational resources requires extensive scientific development within each of these components, and optimized frameworks for coupling and executing these components in a comprehensive manner.<span>&#160; </span>Ultimately, experiment design requires a compromise between complexity and increased resolution.<span>&#160; </span>This talk will explore these compromises within the array of global DYAMOND Phase II winter 40-day simulations completed with GEOS. These include: 1) A coupled 4km ocean and 6km atmosphere with interactive two-moment aerosol cloud microphysics. 2) A 3km 181-level atmosphere with single-moment 6-phase cloud microphysics including 1km global carbon emissions for chemistry transport. 3) A 1.5km 181-level atmosphere with simple parameterized chemistry.</p>