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ORNL’s Salil Mahajan: Gaining perspective on climate variability with high-resolution modeling

Posted at 2:37 pm September 3, 2017
By Oak Ridge Today Staff Leave a Comment

Computational climate scientist Salil Mahajan simulates the complex and chaotic aspects of climate at Oak Ridge National Laboratory. (Photo by ORNL/U.S. Department of Energy)

Computational climate scientist Salil Mahajan simulates the complex and chaotic aspects of climate at Oak Ridge National Laboratory. (Photo by ORNL/U.S. Department of Energy)

 

By Ashley C. Huff, Oak Ridge National Laboratory

Simulating the global climate in high resolution at multiple scales will help answer questions about future global and regional climates. However, as performance expectations increase for Earth system models, so do computing challenges.

Salil Mahajan, a computational climate scientist in the Computational Earth Sciences group at the U.S. Department of Energy’s Oak Ridge National Laboratory, is tackling some of these challenges in high-performance computing for climate science.

Climate is a chaotic system. It includes complex interactions between the atmosphere, oceans, sea ice, and land.

“As we include more dynamic, coupled interactions among these spheres and incorporate more biological, chemical, and physical processes in our models, the computations become more complicated,” Mahajan said. “We have to take a step-by-step approach to understand cause and effect and ensure that our simulations are accurately representing our observational measurements.”

Model validation and verification are now the bread and butter of his daily routine. But Mahajan’s affinity for atmospheric science and computing architectures developed along a circuitous route.

From architecture to atmosphere [Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: Accelerated Climate Modeling for Energy, Ashley C. Huff, Atmospheric Radiation Measurement, CCSI, climate, Climate Change Science Institute, climate data, climate model, climate scientist, computational climate scientist, Computational Earth Sciences, DOE, Forrest Hoffman, global climate, global climate model, Oak Ridge Center for Advanced Studies, Oak Ridge National Laboratory, ORCAS, ORNL, Salil Mahajan, U.S. Department of Energy

Lunch today: ORNL Climate Change Science Institute, impact of climate on society

Posted at 10:19 am February 16, 2016
By Oak Ridge Today Staff Leave a Comment

Melissa-Allen

Melissa R. Allen, post-doctoral research associate, Computational Science and Engineering Division at ORNL (Submitted photo)

Joseph Kennedy and Melissa Allen of Oak Ridge National Laboratory will discus the lab’s Climate Change Science Institute and the impact of climate on society during a lunchtime meeting today (Tuesday, February 16).

Kennedy and Allen will be the guest speakers at the Lunch with the League. Kennedy is a postdoctoral research associate and computational glaciologist at the Institute. Allen is a post-doctoral research associate in the Computational Science and Engineering Division. 

Presented by the League of Women Voters of Oak Ridge, the program will be held at 11:45 a.m. Tuesday in  the Social Hall of the Oak Ridge Unitarian Universalist Church, located at 809 Oak Ridge Turnpike. The public is invited, and no reservations are necessary. Lunches are provided on a first-come basis for $8 or you may bring your own. Coffee and tea are provided.

Also at the meeting, there will be a formal announcement and details of an ORNL CCSI and a League partnership on climate change issues, a press release said. League member Chris Iversen, who leads the climate change action group for the LWVOR, has been working extensively with ORNL to develop this partnership. ORNL is already working with the city of Knoxville on similar partnership. [Read more…]

Filed Under: Community, Front Page News, Meetings and Events, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: CCSI, Chris Iversen, climate, climate change, Climate Change Science Institute, Joseph Kennedy, League of Women Voters of Oak Ridge, Lunch with the League, Melissa Allen, Oak Ridge National Laboratory, ORNL

ORNL Climate Change Science Institute rep to discuss science, policy on Tuesday

Posted at 9:59 am April 13, 2015
By Oak Ridge Today Staff Leave a Comment

Benjamin L. Preston

Benjamin L. Preston

The deputy director of the Climate Change Science Institute at Oak Ridge National Laboratory will discuss climate change science and policy during a Tuesday lunch lecture. The meeting is open to the public.

Ben Preston is deputy director of ORNL’s Climate Change Science Institute. His talk is titled “The State of Climate Change Science and Policy: Local to Global.”

The Friends of ORNL meeting starts with socializing and coffee at 11 a.m., lunch begins at 11:30 a.m., and the lecture starts at noon. A question-and-answer session is scheduled at 12:45 p.m., and the meeting adjourns at 1 p.m. A catered lunch by the Soup Kitchen will be available for $8. [Read more…]

Filed Under: Meetings and Events, Oak Ridge National Laboratory, Science, Top Stories, U.S. Department of Energy Tagged With: Ben Preston, Benjamin L. Preston, biology, CCSI, climate change, climate change impacts, climate change science, Climate Change Science Institute, climate policy, climate system, ecosystem, environmental biology, environmental issues, Environmental Sciences Division, extreme weather, Friends of ORNL, global climate, greenhouse gases, Oak Ridge National Laboratory, ORNL, The State of Climate Change Science and Policy: Local to Global, University of Tennessee Resource Center

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Classifieds

Public Notice: NNSA announces no significant impact of Y-12 Development Organization operations at Horizon Center

AVAILABILITY OF THE FINAL ENVIRONMENTAL ASSESSMENT FOR THE OFFSITE HOUSING OF THE Y-12 DEVELOPMENT … [Read More...]

ADFAC seeks contractors for five homes

Aid to Distressed Families of Appalachian Counties (ADFAC) is a non-profit community based agency, … [Read More...]

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AVAILABILITY OF THE DRAFT ENVIRONMENTAL ASSESSMENT FOR THE OFFSITE HOUSING OF THE Y-12 DEVELOPMENT … [Read More...]

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