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Photo credit: Leslie Mullen, University of Florida for NASA |
One chart, complete with detachable paper satellites, showed the positions of GPS satellites orbiting the Earth. Another student showed off her temperature detector, made from a string, cup and thermometer. |
"This is a lot like the temperature devices we use onboard
a jet to read ground temperature levels," explained Quattrochi.
"Of course, those remote devices don't look quite like this." "Let me try your head," Quattrochi said to one boy. "Wow, you must be a hothead! It says 86 degrees!" The kids all laughed and a girl asked him to read the temperature off her fingernail polish. He complied, explaining it would also show the temperature from her fingers. |
"The good ozone is way up high at the edge of the Earth's atmosphere, whereas the bad ozone is close to the ground," Luvall said. "The ground-level ozone is dangerous because it can scar lungs, and the damage is irreversible." Luvall explained that planting trees and reducing heat levels in a city can help combat ozone pollution. While the scientists want to reduce ground-level ozone, they also want to ensure that the stratospheric ozone - the "good" ozone that protects us from harmful UV radiation - remains intact. Atmospheric chemist Bryan Johnson from the National Oceanic and Atmospheric Administration launched a large latex balloon with a payload designed to test levels of stratospheric ozone. Johnson explained that when the balloon reaches a certain height, the change in atmospheric pressure causes it to burst. After the balloon bursts, the ozone-testing payload parachutes down to Earth. The payload includes a reward notice, promising $30 to anyone who finds and returns it to the scientists. |
Every
day is Earth Day for climate scientists (April
22, 1999): GHCC researchers will use Landsat 7 images for a closer
look at terra firma |
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