CLIMATE Recreating the past . . .
About 22,000 years ago the Earth's great ice sheets began to decline, bringing an end to the Last Glacial Maximum. Given the growing concerns about today's shrinking glaciers and polar ice caps, scientists are interested in knowing what happened the last time the Earth shed much of its ice. Now a group of researchers has run simulations on an Oak Ridge National Laboratory supercomputer over three years to create the first physics-based test of hemispheric deglaciation. Their culprit: a combination of increased insolation (solar radiation that reaches the earth's surface) caused by changes in the Earth's orbit, and ocean circulation. Their work was published in the Feb. 7 issue of Nature. [Contact: Scott Jones, (865) 574-6944; email@example.com]
LIGHTING Brighter future for LEDs . . .
Lights at the Superdome could have been back on in minutes with an LED system developed by an Oak Ridge company that's using Oak Ridge National Laboratory technology. In 2010, LED North America licensed an application for graphite foam, which passively cools components in light-emitting diode lamps. This technology is being used in LED North America's patent-pending module, eliminating most of the weight associated with traditional luminaires that incorporate high-power LEDs. The company has now expanded the concept, enabling an array of modules to be bundled. The lights are already being used in a high-bay application at a facility that handles logistics for Nissan as well as other indoor commercial warehouse buildings. These lights, which use less energy, could potentially replace the mercury lamps used at arenas and stadiums around the country, including the Superdome, which during Super Bowl XLVII experienced a power o
|Contact: Ron Walli|
DOE/Oak Ridge National Laboratory