E3SM

Energy Exascale Earth System Model

Scalable and accurate spatial couplers for climate problems require careful design and implementation to maintain excellent performance on complex architectures. We present an implementation for E3SM, based on MOAB-TempestRemap libraries.

Accurate climate modeling of coupled Earth systems requires mapping of solution field data between dependent components that use non-matching discrete meshes. While existing workflows provide a pathway to generate the projection weights as an offline step, severe bottlenecks impede flexible setup of high-resolution models. In this paper, we present new algorithmic approaches to simplify the E3SM computational workflow using a scalable software infrastructure to generate the remapping operators.