Three "Doppler On Wheels" (DOW) mobile radars developed partly at the National Center for Atmospheric Research (NCAR) are heading toward the mid-Atlantic coast to intercept the eye of Hurricane Isabel as the powerful storm hits land. Meanwhile, the nations next-generation weather model, developed at NCAR and other labs, is training its electronic "eyes" on a virtual Isabel at NCARs supercomputing center in Boulder.
The DOWs will deploy at or near the coast in the direct path of the storm. "From a head-on position," says NCAR affiliate scientist Josh Wurman, "the DOW can collect unprecedented high resolution data and rapid-scan Doppler radar data from inside the eye."
At close range the scans will observe fine-scale but potentially damaging storm features as small as 40-feet across, including wind streaks, gusts and other structures. The DOWs are a collaborative effort between NCAR and the Center for Severe Weather Research. Wurman operates the vehicles through the CSWR, with support primarily from the National Science Foundation.
"This is an exciting opportunity to improve our understanding of the finer scale structure of one of natures most powerful phenomena," says Cliff Jacobs, program director in NSFs division of atmospheric sciences. "Federal support for national centers and university researchers has allowed the nexus of people, tools, and ideas to converge to gain new knowledge about hurricanes."
The newest of the radar systems, called the Rapid-DOW, sends out six radar beams simultaneously. By raking the sky six times faster than traditional single-beam radars, Rapid-DOW can visualize three-dimensional volumes in five-to-ten seconds and observe boundary layer rolls, wind gusts, embedded tornadoes and other phenomena as they evolve.
Back in Boulder, NCAR scientists are running the nations future Weather Research and Forecast (WRF) model on NCARs IBM "Blue Sky" supercomputer, testing the models skill at predicting Isabels intensity, structures and track. Operating on a model grid with data points only 4 kilometers (2.5 miles miles) apart, Blue Sky hums with calculations all night as WRF zooms in on Isabel, bringing into focus the storms internal structure, including eyewall and rain bands. The result is a high-precision, two-day forecast. In the morning, the model starts over to create a new five-day forecast using a 10-kilometer grid and updated conditions.
NCARs primary sponsor, the National Science Foundation (NSF), supported the development of both WRF and the DOW at NCAR. The WRF model is a cooperative effort by NCAR and several federal agencies and military branches.
"Its an exciting opportunity," says scientist Jordan Powers, a WRF development manager at NCAR. "Resolving a hurricanes fine scale structures in real time with this next-generation weather model is breaking new ground for forecasters and researchers."
The DOW is pushing technological limits of its own. "The DOW has revolutionized the study of tornadoes and other violent and small scale atmospheric phenomena," says Wurman. The large, spinning, brightly-colored radar dishes have intercepted the eyes of five hurricanes: Fran, Bonnie, Floyd, Georges and Lili. Data from the retired DOW1 resulted in the discovery of entirely new phenomena in hurricanes, called intense boundary layer rolls, which contain the highest and most dangerous wind gusts.
Though Powers wont be using DOW data for WRFs forecasts this week, he and others may compare Wurmans real-world observations with the model results in the future.
NSF Program Officer: Cliff Jacobs, (703) 292-8521, email@example.com
The National Science Foundation is an independent federal agency that supports fundamental research and education across all fields of science and engineering, with an annual budget of nearly $5.3 billion. National Science Foundation funds reach all 50 states through grants to nearly 2,000 universities and institutions. Each year, NSF receives about 30,000 competitive requests for funding, and makes about 10,000 new funding awards. The National Science Foundation also awards over $200 million in professional and service contracts yearly.
Cheryl Dybas | NSF
Hidden river once flowed beneath Antarctic ice
22.08.2017 | Rice University
Greenland ice flow likely to speed up: New data assert glaciers move over sediment, which gets more slippery as it gets wetter
17.08.2017 | Swansea University
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
22.08.2017 | Life Sciences
22.08.2017 | Life Sciences
22.08.2017 | Life Sciences