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Flood-alert System Eased Fears At Texas Medical Center |
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Written by Ivan
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Sunday, 28 September 2008 |
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With stunning accuracy, Rice researchers predicted the peak surge of Houston's Brays Bayou during and immediately after Ike, despite power outages that shut down the university's computing center at a critical time. "The TMC was very happy about how well the system worked and the fact that we were able to pull this off via a long-distance connection," said Phil Bedient, Rice's Herman Brown Professor of Engineering and a widely known expert on flood warning and storm surges. "They were very concerned, because if the medical center had gone under, it would have been a mess." Bedient, who with the TMC set up a real-time flood alert system in the years since Allison, saw that effort pay off during the storm. "We absolutely nailed it," he said. Having lost power at his own Houston home, Bedient spent a long night during Ike evaluating radar rainfall data coming by phone from the National Weather Service's radar through Vieux & Associates Inc. in Oklahoma and calling medical center officials with his predictions. |
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Last Updated ( Sunday, 28 September 2008 )
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Puzzling Property Of Night-shining Clouds At Edge Of Space Explained |
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Written by Ivan
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Sunday, 28 September 2008 |
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Noctilucent clouds, also known as night-shining clouds, were first described in 1885, two years after the massive eruption of Krakatoa, a volcanic island in Indonesia, sent up a plume of ash and debris up to 80 km into Earth's atmosphere. The eruption affected global climate and weather for years and may have produced the first noctilucent clouds. The effects of Krakatoa eventually faded, but the unusual electric blue clouds remain, nestled into a thin layer of Earth's mesosphere, the upper atmosphere region where pressure is 10,000 times less than at sea level. The clouds, which are visible during the deep twilight, are most often observed during the summer months at latitudes from 50 to 70 degrees north and south--although in recent years they have been seen as far south as Utah and Colorado. Noctilucent clouds are a summertime phenomenon because, curiously, the atmosphere at 85 km altitude is coldest in summer, promoting the formation of the ice grains that make up the clouds. |
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