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  • richardmitnick 1:17 pm on May 9, 2018 Permalink | Reply
    Tags: , , , E3SM earth system model,   

    From Argonne National Laboratory ALCF: “E3SM provides powerful, new Earth system model for supercomputers” 

    Argonne Lab
    News from Argonne National Laboratory

    From Argonne National Laboratory ALCF

    May 8, 2018
    Andrea Manning

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    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. This earth simulation project emerged from Argonne and other U.S. DOE national laboratories, including Brookhaven, Lawrence Livermore, Lawrence Berkeley, Los Alamos, Oak Ridge, Pacific Northwest, and Sandia, as well as several universities. Credit: E3SM.org

    The Earth — with its myriad shifting atmospheric, oceanic, land, and ice components — presents an extraordinarily complex system to simulate using computer models.

    But a new Earth modeling system, the Energy Exascale Earth System Model (E3SM), is now able to capture and simulate all these components together. 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 system can help researchers anticipate decadal-scale changes that could influence the U.S. energy sector in years to come.

    The E3SM project is supported by the U.S. Department of Energy’s (DOE) Office of Biological and Environmental Research. “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.

    To support this mission, the project’s goal is to develop an Earth system model that increases prediction reliability. This objective has historically been limited by constraints in computing technologies and uncertainties in theory and observations. 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. energy needs.

    “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. “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

    Simulating the Earth involves solving approximations of physical, chemical, and biological governing equations on spatial grids at the highest resolutions possible.

    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. 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). 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.

    This objective underscores the project’s heavy emphasis on both performance and infrastructure — two key areas of strength for Argonne. “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. 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-petaflops system at the Argonne Leadership Computing Facility, and will conduct some of the high-res simulations on that platform.”

    Researchers using the E3SM can employ variable resolution on all model components (atmosphere, ocean, land, ice), allowing them to focus computing power on fine-scale processes in different regions. The software uses advanced mesh-designs that smoothly taper the grid-scale from the coarser outer region to the more refined region.

    Adapting for exascale

    E3SM’s developers — more than 100 scientists and software engineers — have a longer-term aim: to use the exascale machines that the DOE Advanced Scientific Computing Research Office expects to procure over the next five years. Thus, E3SM development is proceeding in tandem with the Exascale Computing Initiative. (Exascale refers to a computing system capable of carrying out a billion [1018] calculations per second — a thousand-fold increase in performance over the most advanced computers from a decade ago.)

    Another key focus will be on software engineering, which includes all of the processes for developing the model; designing the tests; and developing the required infrastructure, including input/output libraries and software for coupling the models. E3SM uses Argonne’s Model Coupling Toolkit (MCT), as do other leading climate models (e.g., Community Earth System Model [CESM]) to couple the atmosphere, ocean, and other submodels. (A new version of MCT [2.10] was released along with E3SM.)

    Additional Argonne-specific contributions in Phase II will center on:

    Crop modeling: Efforts will focus on better emulating crops such as corn, wheat, and soybeans, which will improve simulated influences of crops on carbon, nutrient, energy, and water cycles, as well as capturing the implications of human-Earth system interactions
    Dust and aerosols: These play a major role in the atmosphere, radiation, and clouds, as well as various chemical cycles.

    Collaboration among – and beyond – national laboratories

    The E3SM project has involved researchers at multiple DOE laboratories including Argonne, Brookhaven, Lawrence Livermore, Lawrence Berkeley, Los Alamos, Oak Ridge, Pacific Northwest, and Sandia national laboratories, as well as several universities.

    The project also benefits from collaboration within DOE, including with the Exascale Computing Project and programs in Scientific Discovery through Advanced Computing, Climate Model Development and Validation, Atmospheric Radiation Measurement, Program for Climate Model Diagnosis and Intercomparison, International Land Model Benchmarking Project, Community Earth System Model, and Next-Generation Ecosystem Experiments for the Arctic and the Tropics.

    The code is available on GitHub, the host for the project’s open-source repository. For additional information, visit the E3SM website: http://e3sm.org.

    ANL ALCF Cetus IBM supercomputer

    ANL ALCF Theta Cray supercomputer

    ANL ALCF Cray Aurora supercomputer

    ANL ALCF MIRA IBM Blue Gene Q supercomputer at the Argonne Leadership Computing Facility

    See the full article here .

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    Argonne National Laboratory seeks solutions to pressing national problems in science and technology. The nation’s first national laboratory, Argonne conducts leading-edge basic and applied scientific research in virtually every scientific discipline. Argonne researchers work closely with researchers from hundreds of companies, universities, and federal, state and municipal agencies to help them solve their specific problems, advance America’s scientific leadership and prepare the nation for a better future. With employees from more than 60 nations, Argonne is managed by UChicago Argonne, LLC for the U.S. Department of Energy’s Office of Science. For more visit http://www.anl.gov.

    About ALCF

    The Argonne Leadership Computing Facility’s (ALCF) mission is to accelerate major scientific discoveries and engineering breakthroughs for humanity by designing and providing world-leading computing facilities in partnership with the computational science community.

    We help researchers solve some of the world’s largest and most complex problems with our unique combination of supercomputing resources and expertise.

    ALCF projects cover many scientific disciplines, ranging from chemistry and biology to physics and materials science. Examples include modeling and simulation efforts to:

    Discover new materials for batteries
    Predict the impacts of global climate change
    Unravel the origins of the universe
    Develop renewable energy technologies

    Argonne is managed by UChicago Argonne, LLC for the U.S. Department of Energy’s Office of Science

    Argonne Lab Campus

     
  • richardmitnick 1:09 pm on April 27, 2018 Permalink | Reply
    Tags: , , , E3SM earth system model,   

    From Brookhaven Lab: “New High-Resolution Exascale Earth Modeling System for Energy” 

    Brookhaven Lab

    April 23, 2018

    Peter Genzer
    genzer@bnl.gov

    1
    The high-resolution E3SM earth system model simulates the strongest storms with surface winds exceeding 150 mph—hurricanes that leave cold wakes that are 2 to 4 degrees Celsius cooler than their surroundings. This simulation from E3SM represents how sea surface temperature changes evolve as a hurricane (seen here approaching the U.S. East Coast) moves across the Atlantic and how the resultant cold wake affects subsequent intensification of the next hurricane.

    2

    3
    Above 2 images-DOE’s E3SM is a state-of-the-science Earth system model development and simulation project to investigate energy-relevant science using code optimized for DOE’s advanced computers

    A new earth modeling system unveiled today will have weather-scale resolution and use advanced computers to simulate aspects of Earth’s variability and anticipate decadal changes that will critically impact the U.S. energy sector in coming years.

    After four years of development, the Energy Exascale Earth System Model (E3SM) will be released to the broader scientific community this month. The E3SM project is supported by the Department of Energy’s Office of Science in the Biological and Environmental Research Office. The E3SM release will include model code and documentation, as well as output from an initial set of benchmark simulations.

    The Earth, with its myriad interactions of atmosphere, oceans, land and ice components, presents an extraordinarily complex system for investigation. Earth system simulation involves solving approximations of physical, chemical and biological governing equations on spatial grids at resolutions that are as fine in scale as computing resources will allow.

    The E3SM project will reliably simulate aspects of earth system variability and project decadal changes that will critically impact the U.S. energy sector in the near future. These critical factors include a) regional air/water temperatures, which can strain energy grids; b) water availability, which affects power plant operations; c) extreme water-cycle events (e.g. floods and droughts), which impact infrastructure and bio-energy; and d) sea-level rise and coastal flooding which threaten coastal infrastructure.

    The goal of the project is to develop an earth system model (ESM) that has not been possible because of limitations in current computing technologies. Meeting this goal will require advances on three frontiers: 1) better resolving earth system processes through a strategic combination of developing new processes in the model, increased model resolution and enhanced computational performance; 2) representing more realistically the two-way interactions between human activities and natural processes, especially where these interactions affect U.S. energy needs; and 3) ensemble modeling to quantify uncertainty of model simulations and projections.

    “The quality and quantity of observations really makes us constrain the models,” said David Bader, Lawrence Livermore National Laboratory (LLNL) scientist and lead of the E3SM project. “With the new system, we’ll be able to more realistically simulate the present, which gives us more confidence to simulate the future.”


    The U.S. Department of Energy (DOE) today unveiled a powerful, new earth system model that uses the world’s fastest computers so that scientists can better understand how earth system processes interact today and how they may evolve in the future. The Energy Exascale Earth System model, or E3SM, is the product of four years of development by top geophysical and computational scientists across DOE’s laboratory complex. This video highlights the capabilities and goals of the E3SM project.

    [Currently, this project is running only on NERSC’s Edison system, but this project uses open source software that could ostensibly be run on any high-performance computing cluster to simulate earth systems.]

    LBL NERSC Cray XC30 Edison supercomputer

    Simulating atmospheric and oceanic fluid dynamics with fine spatial resolution is especially challenging for ESMs. The E3SM project is positioned on the forefront of this research challenge, acting on behalf of an international ESM effort. Increasing the number of earth-system days simulated per day of computing time is a prerequisite for achieving the E3SM project goal. It also is important for E3SM to effectively use the diverse computer architectures that the DOE Advanced Scientific Computing Research (ASCR) Office procures to be prepared for the uncertain future of next-generation machines. A long-term aim of the E3SM project is to use exascale machines to be procured over the next five years. The development of the E3SM is proceeding in tandem with the Exascale Computing Initiative (ECI). (An exascale refers to a computing system capable of carrying out a billion billion (109 x 109 = 1018) calculations per second. This represents a thousand-fold increase in performance over that of the most advanced computers from a decade ago),

    “This model adds a much more complete representation between interactions of the energy system and the earth system,” Bader said. “The increase in computing power allows us to add more detail to processes and interactions that results in more accurate and useful simulations than previous models.”

    To address the diverse critical factors impacting the U.S. energy sector, the E3SM project is dedicated to answering three overarching scientific questions that drive its numerical experimentation initiatives:

    Water Cycle: How does the hydrological cycle interact with the rest of the human-Earth system on local to global scales to determine water availability and water cycle extremes?
    Biogeochemistry: How do biogeochemical cycles interact with other Earth system components to influence the energy sector?
    Cryosphere Systems: How do rapid changes in cryosphere (continental and ocean ice) systems evolve with the Earth system, and contribute to sea-level rise and increased coastal vulnerability?

    In the E3SM, all model components (atmosphere, ocean, land, ice) are able to employ variable resolution to focus computing power on fine-scale processes in regions of particular interest. This is implemented using advanced mesh-designs that smoothly taper the grid-scale from the coarser outer region to the more refined region.
    The E3SM project includes more than 100 scientists and software engineers at multiple DOE Laboratories as well as several universities; the DOE laboratories include Argonne, Brookhaven, Lawrence Livermore, Lawrence Berkeley, Los Alamos, Oak Ridge, Pacific Northwest and Sandia national laboratories. In recognition of unifying the DOE earth system modeling community to perform high-resolution coupled simulations, the E3SM executive committee was awarded the Secretary of Energy’s Achievement Award in 2015.

    In addition, the E3SM project also benefits from-DOE programmatic collaborations including the Exascale Computing Project (ECP) and programs in Scientific Discovery through Advanced Computing (SciDAC), Climate Model Development and Validation (CMDV), Atmospheric Radiation Measurement (ARM), Program for Climate Model Diagnosis and Intercomparison (PCMDI), International Land Model Benchmarking Project (iLAMB), Community Earth System Model (CESM) and Next Generation Ecosystem Experiments (NGEE) for the Arctic and the Tropics.

    For information, go the E3SM website. http://e3sm.org

    See the full article here .

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    One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. The Laboratory’s almost 3,000 scientists, engineers, and support staff are joined each year by more than 5,000 visiting researchers from around the world. Brookhaven is operated and managed for DOE’s Office of Science by Brookhaven Science Associates, a limited-liability company founded by Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit, applied science and technology organization.
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