Scientists Robert Houze of the University of Washington and Shuyi Chen of the University of Miami will discuss early results from RAINEX, including findings that concentrated pockets of fast-rotating air within a hurricane's eyewall and rainbands feed the storm and strengthen its winds.
Their measurements of a hurricane's eyewall and outer rainbands have led to new insights on improving high-resolution modeling of hurricanes, and making better forecasts of how quickly a hurricane's intensity may change.
RAINEX used three Doppler radar-equipped aircraft, aided by high-resolution numerical modeling. The experiment was the first time aircraft flights into a hurricane were directed from crews on the ground in real time.
The storms investigated were in all stages of development, from tropical depression to a category 5 hurricane. Observations of Hurricane Ophelia provided a first-ever look at what scientists call the "convective burst phenomenon" that marks the initial stages of a hurricane's formation. The researchers flew into Hurricane Rita during what's known as an eyewall replacement cycle, which is key to understanding the interaction of eyewalls and rainbands and the relationship of those interactions to rapid storm intensity changes.
WHO: Atmospheric scientists Robert Houze and Shuyi Chen
WHAT: Lecture: Aircraft Observations and Modeling of Hurricanes Katrina, Ophelia and Rita
National Science Foundation
4201 Wilson Blvd.
Arlington, VA 22230
Wednesday, June 28, 2006
9:30 - 10:30 a.m.
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