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Primeur weekly 2017-07-24

Focus

20th Birthday celebrating OpenMP still welcoming new members ...

Fujitsu's processor roadmap is hitting new targets for Deep Learning ...

Focus on Europe

New FPGA programming method delivers five times more computing power ...

Gazprom Neft to utilise capacity at the St Petersburg Polytechnic University supercomputer ...

Tenfold connectivity increase between Ukraine and European research and education network ...

Newly improved Brain Simulation Platform now online ...

Joeri van Leeuwen received a grant and in-kind expertise from the eScience Center for his astronomy project AA-ALERT ...

Middleware

Bright Computing and Brazil-based AMT sign partnership agreement ...

Hardware

7th International Women in HPC workshop ...

IBM scientists observe elusive gravitational effect in solid-state physics ...

New Supermicro Rack Scale Design (RSD) supports high-density, high-performance pooled NVMe storage ...

Inspur announced the new M5 series servers to get businesses ready for the new era of intelligent computing ...

Women, leadership and Flash - Panel and networking event ...

Applications

3D models help scientists gauge flood impact ...

Pulses of electrons manipulate nanomagnets and store information ...

Flashes of light on the dark matter ...

Titan simulations show importance of close 2-way coupling between human and Earth systems ...

A firefly's flash inspires new nanolaser light ...

Simulation reveals universal signature of chaos in ultracold reactions ...

Massive simulation shows HIV capsid interacting with its environment ...

ANSYS, Saudi Aramco and KAUST shatter supercomputing record ...

Scientists use "Piz Daint" simulations to track heavy summer precipitation from the Mediterranean ...

Fernanda Foertter elected SIG HPC Education Vice Chair ...

The Cloud

IBM expands global Cloud data centre presence with four new facilities ...

The Cloud comes to you: AT&T to power self-driving cars, AR/VR and other future 5G applications through edge computing ...

Teradata acquires San Diego-based start-up StackIQ to strengthen Teradata Everywhere and IntelliCloud capabilities ...

IBM mainframe ushers in new era of data protection ...

Solarflare lets server racks match connectivity of a human neuron ...

New high speed interface connects IBM Z to IBM storage systems ...

Oracle significantly expands Cloud at Customer with PaaS and SaaS services to help customers in their journey to the Cloud ...

Titan simulations show importance of close 2-way coupling between human and Earth systems


A new integrated climate model developed by Oak Ridge National Laboratory and other institutions is designed to reduce uncertainties in future climate predictions as it bridges Earth systems with energy and economic models and large-scale human impact data. Credit: ORNL.
18 Jul 2017 Oak Ridge - A new integrated computational climate model developed to reduce uncertainties in future climate predictions marks the first successful attempt to bridge Earth systems with energy and economic models and large-scale human impact data. The integrated Earth System Model, or iESM, is being used to explore interactions among the physical climate system, biological components of the Earth system, and human systems.

By using supercomputers such as Titan, a large multidisciplinary team of scientists led by Peter Thornton of the US Department of Energy's (DOE) Oak Ridge National Laboratory (ORNL) had the power required to integrate massive codes that combine physical and biological processes in the Earth system with feedbacks from human activity.

"The model we developed and applied couples biospheric feedbacks from oceans, atmosphere, and land with human activities, such as fossil fuel emissions, agriculture, and land use, which eliminates important sources of uncertainty from projected climate outcomes", stated Peter Thornton, leader of the Terrestrial Systems Modeling group in ORNL's Environmental Sciences Division and deputy director of ORNL's Climate Change Science Institute.

Titan is a 27-petaflop Cray XK7 machine with a hybrid CPU-GPU architecture managed by the Oak Ridge Leadership Computing Facility (OLCF), a DOE Office of Science User Facility located at ORNL.

Through the Advanced Scientific Computing Research Leadership Computing Challenge programme, Peter Thornton's team was awarded 85 million compute hours to improve the Accelerated Climate Modeling for Energy (ACME) effort, a project sponsored by the Earth System Modeling programme within DOE's Office of Biological and Environmental Research. Currently, ACME collaborators are focused on developing an advanced climate model capable of simulating 80 years of historic and future climate variability and change in 3 weeks or less of computing effort.

Now in its third year, the project has achieved several milestones - notably the development of ACME version 1 and the successful inclusion of human factors in one of its component models, the iESM.

"What's unique about ACME is that it's pushing the system to a higher resolution than has been attempted before", Peter Thornton stated. "It's also pushing toward a more comprehensive simulation capability by including human dimensions and other advances, yielding the most detailed Earth system models to date."

To inform its Earth system models, the climate modelling community has a long history of using integrated assessment models - frameworks for describing humanity's impact on Earth, including the source of global greenhouse gases, land use and land cover change, and other resource-related drivers of anthropogenic climate change.

Until now, researchers had not been able to directly couple large-scale human activity with an Earth system model. In fact, the novel iESM could mark a new era of complex and comprehensive modeling that reduces uncertainty by incorporating immediate feedbacks to socioeconomic variables for more consistent predictions.

The development of iESM started before the ACME initiative when a multilaboratory team aimed to add new human dimensions - such as how people affect the planet to produce and consume energy - to Earth system models. The model - now a part of the ACME human dimensions component - is being merged with ACME in preparation for ACME version 2.

Along with iESM, the ACME team has added enhancements to the land, atmosphere, and ocean components of their code. These include a more capable framework for calculating the cyclical flow of chemical elements and compounds like carbon, nitrogen, and water in the environment. The new ACME land model includes a fully-coupled reactive transport scheme for these biogeochemical processes. This capability will provide a more consistent connection between physical (thermal and hydrologic) and biological components of the simulation.

Perhaps the most significant advancement, however, is the introduction of the phosphorous cycle to the code. Phosphorous is an essential nutrient for life, moving from soil and sediment to plants and animals and back. ACME version 1 is the first global earth system model that includes this dynamic.

In addition to increasing the resolution of the model, and thus estimating new parameters, ongoing tuning and optimizing of ACME has brought the team closer to reaching its 80-years-in-3-weeks simulation speed goal. With the advances, the team can now run about 3 or 4 simulated years per day, about twice the output of earlier code versions.

"The overall ACME project not only involves developing these high-resolution models but also optimizing their performance on high-performance computing platforms that DOE has at its disposal - including Titan - to get to our target of 5 simulated years per day", Peter Thornton stated.

Increased utilization of Titan's GPUs is helping the project reach the next level. The OLCF's Matthew Norman is working with Peter Thornton's team to offload various parts of ACME to GPUs, which excel at quickly executing repetitive calculations.

"ACME version 2 should make much more use of the GPUs to increase simulation performance, and there are other projects that are spin-off efforts using ACME that are targeting Summit - the OLCF's next leadership-class machine - and future exascale platforms", Matthew Norman stated.

The OLCF is continuing to assist the team with data management via advanced monitoring and workflow tool support to help reduce the amount of time researchers need to get results. OLCF staff, including liaisons Valentine Anantharaj and Matthew Norman, are also helping with various tasks like debugging, scaling, and optimizing code.

"The liaisons are crucial for helping us understand where to look for problems when they arise and getting the best performance out of the Titan supercomputer", Peter Thornton stated.

For iESM to take the next step, the representation of land surface between coupled models must become more consistent. The team also aims to include other dimensions, including water management and storage, agricultural productivity, and commodity pricing structures. This will yield better information about potential changes in water resource availability, allocation, and shortages under different climates.

"These improvements are vital since there is concern that fresh water resources might be the pinch point that gets felt first", Peter Thornton stated.

ACME version 1 will be publicly released in late-2017 for analysis and use by other researchers. Results from the model will also contribute to the Coupled Model Intercomparison Project, which provides foundational material for climate change assessment reports.

Co-authors of the paper, published in Nature Climate Change , that details development of the iESM model are from ORNL, Pacific Northwest National Laboratory, Lawrence Berkeley National Laboratory, University of Maryland, and Field to Market: The Alliance for Sustainable Agriculture.

Source: DOE/Oak Ridge National Laboratory

Back to Table of contents

Primeur weekly 2017-07-24

Focus

20th Birthday celebrating OpenMP still welcoming new members ...

Fujitsu's processor roadmap is hitting new targets for Deep Learning ...

Focus on Europe

New FPGA programming method delivers five times more computing power ...

Gazprom Neft to utilise capacity at the St Petersburg Polytechnic University supercomputer ...

Tenfold connectivity increase between Ukraine and European research and education network ...

Newly improved Brain Simulation Platform now online ...

Joeri van Leeuwen received a grant and in-kind expertise from the eScience Center for his astronomy project AA-ALERT ...

Middleware

Bright Computing and Brazil-based AMT sign partnership agreement ...

Hardware

7th International Women in HPC workshop ...

IBM scientists observe elusive gravitational effect in solid-state physics ...

New Supermicro Rack Scale Design (RSD) supports high-density, high-performance pooled NVMe storage ...

Inspur announced the new M5 series servers to get businesses ready for the new era of intelligent computing ...

Women, leadership and Flash - Panel and networking event ...

Applications

3D models help scientists gauge flood impact ...

Pulses of electrons manipulate nanomagnets and store information ...

Flashes of light on the dark matter ...

Titan simulations show importance of close 2-way coupling between human and Earth systems ...

A firefly's flash inspires new nanolaser light ...

Simulation reveals universal signature of chaos in ultracold reactions ...

Massive simulation shows HIV capsid interacting with its environment ...

ANSYS, Saudi Aramco and KAUST shatter supercomputing record ...

Scientists use "Piz Daint" simulations to track heavy summer precipitation from the Mediterranean ...

Fernanda Foertter elected SIG HPC Education Vice Chair ...

The Cloud

IBM expands global Cloud data centre presence with four new facilities ...

The Cloud comes to you: AT&T to power self-driving cars, AR/VR and other future 5G applications through edge computing ...

Teradata acquires San Diego-based start-up StackIQ to strengthen Teradata Everywhere and IntelliCloud capabilities ...

IBM mainframe ushers in new era of data protection ...

Solarflare lets server racks match connectivity of a human neuron ...

New high speed interface connects IBM Z to IBM storage systems ...

Oracle significantly expands Cloud at Customer with PaaS and SaaS services to help customers in their journey to the Cloud ...