1997 EARTH SCIENCE VIDEOTAPES |
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Tape Title | Record ID | Date Produced | TRT: |
Synopsis |
| SEAWIFS EYES DRAMATIC CHANGES IN GALAPAGOS ECOSYSTEM
| G97-040 | 11/17/97 | 00:05:10 | Video package features a series of images that show the biological changes in the marine eco-system brought to the Galapagos region by El Nino.
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TAPE CONTENTS: |
| ITEM (1): SEAWIFS EYES GALAPAGOS - The sequence illustrates the dramatic biological changes in the marine ecosystem around the Galapagos Islands by comparing plankton concentrations at the end of the large 1982-1983 El Nino (first image) with an image from this year's powerful El Nino (second image). The colors in the images represent the concentrations of microscopic plants (phytoplankton) that makeup the lowest levels of the ocean's food chain. Higher concentrations are shown in red and yellow.
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| ITEM (2): 1983 GALAPAGOS STILL IMAGE - A tremendous plankton "bloom" can be seen in this image as ocean conditions returned to normal after the large 1982-83 El Nino. The plankton respond to nutrient-rich waters brought to the surface as ocean currents flow past the islands from east to west. The image was taken by the Coastal Zone Color Scanner (CZCS) satellite on Oct. 31, 1983.
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| ITEM (3): 1997 GALAPAGOS STILL IMAGE - This image reflects the changes brought to the Galapagos region by El Nino. The abnormally warm waters associated with El Nino act like a "lens" which greatly restricts the upwelling of nutrient-rich waters and essentially chokes off the ecosystem. The consequence for marine mammals and birds is likely to be very severe. The image was taken by the NASA's Sea-viewing Wide Field-of-view Sensor (SeaWiFS) instrument.
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| ITEM (4): CHESAPEAKE SEQUENCE - Image showing plankton concentrations in Chesapeake.
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| ITEM (5): GULF SEQUENCE (DEAD ZONE) - Image showing plankton concentrations off of the Louisiana Coast.
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| ITEM (6): OCEAN COLOR PROCESS - Animation showing how ocean color is observed.
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| ITEM (7): SEAWIFS INSTRUMENT - Animation of NASA's SeaWiFS instrument (onboard the SeaStar satellite)
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| ITEM (8): INTERVIEW W/CHUCK MCCLAIN, SEAWIFS PROJECT SCIENTIST
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