Singling out the threading expertise of performance engineer Azamat Mametjanov of Argonne’s Mathematics and Computer Science division, Jacob continued: “We’ve been running and testing on Theta, our new 10-petaflop system at Argonne’s Leadership Computing Facility, and will conduct some of the high-res simulations on that platform.” “Our researchers have been active in ensuring that the model performs well with many threads,” said Jacob, who will lead the infrastructure group in Phase II, which - with E3SM’s initial release - starts on July 1. This objective underscores the project’s heavy emphasis on both performance and infrastructure - two key areas of strength for Argonne. The goal is for E3SM to support simulation of five years of the Earth system on a single computing day at its highest possible resolution by 2021. The new release can simulate 10 years of the Earth system in one day at low resolution or one year of the Earth system at high resolution in one day (a sample movie is available at the project website). In fact, increasing the number of Earth-system days simulated per day of computing time at varying levels of resolution is so important that it is a prerequisite for achieving the E3SM project goal. Simulating the Earth involves solving approximations of physical, chemical and biological governing equations on spatial grids at the highest resolutions possible. “With this new system, we’ll be able to more realistically simulate the present, which gives us more confidence to simulate the future.” The long view “This model adds a much more complete representation between interactions of the energy system and the Earth system,” said David Bader, a computational scientist at Lawrence Livermore National Laboratory and overall E3SM project lead. Enhancing prediction reliability requires advances on two frontiers: (1) improved simulation of Earth system processes by developing new models of physical processes, increasing model resolution and enhancing computational performance and (2) representing the two-way interactions between human activities and natural processes more realistically, especially where these interactions affect U.S. This objective has historically been limited by constraints in computing technologies and uncertainties in theory and observations. To support this mission, the project’s goal is to develop an Earth system model that increases prediction reliability. “One of E3SM’s purposes is to help ensure that DOE’s climate mission can be met - including on future exascale systems,” said Robert Jacob, a computational climate scientist in the Environmental Science division of DOE’s Argonne National Laboratory and one of 15 project co-leaders. Department of Energy’s (DOE) Office of Biological and Environmental Research. The E3SM project is supported by the U.S. “With this new system, we’ll be able to more realistically simulate the present, which gives us more confidence to simulate the future.” - David Bader, computational scientist at Lawrence Livermore National Laboratory and overall E3SM project lead. The system can help researchers anticipate decadal-scale changes that could influence the U.S. Released on April 23, after four years of development, E3SM features weather-scale resolution - i.e., enough detail to capture fronts, storms and hurricanes - and uses advanced computers to simulate aspects of the Earth’s variability. The Earth - with its myriad shifting atmospheric, oceanic, land and ice components - presents an extraordinarily complex system to simulate using computer models.īut a new Earth modeling system, the Energy Exascale Earth System Model (E3SM), is now able to capture and simulate all these components together. Image: Argonne scientists helped create a comprehensive new model that draws on supercomputers to simulate how various aspects of the Earth - its atmosphere, oceans, land, ice - move.
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