Water consumption to increase with future U.S. energy needs
Future power plants can use more water-efficient cooling technologies to withdraw less water from rivers and ponds, but PNNL research shows there is a tradeoff. Water-efficient cooling technologies typically reuse water instead of using it just once, but they also warm the reused water and cause evaporation that removes water from the local ecosystem. PNNL used a computer model to estimate future energy generation and associated water use for each of the 50 states. The detailed analysis found while the nation's energy sector could withdraw less water with advanced cooling technologies, the amount of water consumed through evaporation would increase. The study also identified several other trends, such as energy-related water withdrawals decreasing in the Eastern U.S. while they increase in the West. PNNL environmental scientist Lu Liu will present a poster on this research.
H11J-1274: "An integrated assessment of energy-water nexus at the state level in the United States: Projections and analyses under different scenarios through 2095," 8 a.m. 12:20 p.m., Tuesday, Dec. 10, Hall A-C (Moscone South).
Climate change alters bacteria behavior
Climate change doesn't affect just polar bears and ice caps; it also impacts the tiny microbes that help plants soak up nutrients in the soil. New research shows transplanted soil bacteria adjust their enzyme production to better survive in a new climate. The findings are a result of a unique study where soil samples were transplanted between two elevations about 1700 feet apart on an isolated mountain in rural Washington state. The scientists gave the transplanted soil about 17 years to settle into its new surroundings and then compared its bacteria with bacteria in unmoved soil samples. The researchers found bacteria made more of some enzymes in the higher-up soil, where it's wetter and cooler and there's more
|Contact: Franny White|
DOE/Pacific Northwest National Laboratory