1997 EARTH SCIENCE VIDEOTAPES |
| |
Tape Title | Record ID | Date Produced | TRT: |
Synopsis |
| LOW ARCTIC OZONE LEVELS FOUND OVER THE NORTH POLE | G97-010 | 4/22/97 | 00:04:56 | Animation developed from data collected by satellite-based instruments operated by NASA and the National Oceanic and Atmospheric Administration (NOAA) depict unusually low levels of ozone in the Arctic.
|
TAPE CONTENTS: |
| ITEM (1): LOW ARCTIC OZONE LEVELS DURING MARCH, 1997 - This animation shows unusually low levels of Ozone over the Arctic this past March. Higher levels of Ozone are shown in red. Lower levels in purple. The small black area near the North Pole is an area the satellite cannot observe during the winter. (TRT: 0:20) Centered in a stable, nearly circular region over the North Pole, the average March 1997 ozone amounts were 40 percent lower than the average March amounts observed between 1979 and 1982. This follows ozone amounts in March 1996 that were 24 percent lower than the 1979-82 average, although this low was off center of Earth's pole toward the North Atlantic.
|
| ITEM (2): OZONE PROTECTS THE EARTH - Animation depicting how ozone protects the Earth from ultraviolet radiation. (TRT 0:20) Ozone protects the Earth by absorbing harmful ultraviolet radiation ... the ozone molecule is split into one free oxygen atom and one molecule of ordinary oxygen. The free oxygen eventually may collide with an oxygen molecule to again form ozone molecules. |
| ITEM (3): OZONE DEPLETION - Animation illustrating ozone depletion. (TRT: 0:20) - Chlorofluorocarbons (CFCs) can break up the protective ozone molecules located in the stratosphere. Ultraviolet radiation strikes a CFC molecule and causes a chorine atom to break away. The chlorine atom collides with an ozone molecule and steals an oxygen atom, thus destroying the ozone molecule. One chlorine atom can destroy many thousands of ozone molecules in its lifetime.
|
| ITEM (4): ANIMATION OF TOMS SATELLITE - Observations taken by Total Ozone Mapping Spectrometer (TOMS) instruments onboard NASA's Earth Probe (TOMS-EP) Satellite & Japan's Advanced Earth Observing Satellite (ADEOS). (TRT: 0:10)
|
| ITEM (5): SUN BACKGROUND FOOTAGE (TRT: 0:15)
|
| ITEM (6): DR. PAUL NEWMAN B-ROLL - B-roll of Newman looking at TOMS data.
|
| ITEM (7): INTERVIEW - DR. PAUL NEWMAN, ATMOSPHERIC PHYSICIST, GODDARD SPACE FLIGHT CENTER - Explains the significance of the low levels of Arctic Ozone. (TRT: 1:10)
|