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... Research Council released Summary Report of the Ad Hoc Panel on (NOx) and the Ozone Layer. National Oceanic and Atmospheric Administration had asked Panel to review paper by Univ. of California ... examine need for studies of effects of aircraft nitrogen-oxide emissions on earth's ozone layer; atmospheric dynamics, physics, and chemistry; nature of prospective emissions into stratosphere; and biological effects on ...

... brightness of the more recent Comet Bradfield had led to the theory that comets were layered like onions, Dr. Edward P. Ney, Univ. of Minnesota scientist, reported at a joint meeting ... the American Physical Society and the Optical Society of America. When some layers were exposed, they shone brilliantly; when a layer wore off, the comet might abruptly become dim. The onion model ...

... atmosphere were warmed. GATE scientists also investigated the air layer between the cloud bases and the sea surface, finding that the subcloud layer was profoundly altered by the passage of a cloud ... resulting mix might explain cloud spacing and lifetime, and might indicate a continually changing subcloud layer in marked contrast to conditions prevailing in fair weather. GATE experiments documented the existence of ...

The earth's ozone layer, a shield of heavy molecules of oxygen that prevents some harmful ultraviolet radiation from reaching ... fertilizers over the next 25 yr could reduce the ozone layer 20 to 25%. Theoretically, each 1% reduction in the ozone layer could lead to thousands-as many as 15 000-additional ...

... thousand yards. (W Post, Parade, May 15/77, 6) Threats to the earth's ozone layer remained a matter for concern, Walter Sullivan reported in the NY Times, especially fluorocarbons widely ... in ultraviolet exposure would probably increase the incidence of cancer. Other dangers to the ozone layer included supersonic planes and other high-flying aircraft, nuclear explosions, and the heavy use of ...

... and maneuvered as well as reduction in mission cost. The new cells had a "window layer" of gallium aluminum arsenide on the surface of the gallium arsenide cell. Absorption of sunlight in an ultra thin layer just below the surface of a solar cell had meant loss of some of the ... at the surface, accounting for the low efficiencies of previous cells; presence of the window layer had reduced this loss. (NASA Release 77-163) Johnson Space Center JSC announced that a ...

... eventually settled to the ground, in the same geologic layers that five years previously gave evidence of the asteroid impact. The layer, sampled in regions as far apart as Europe and New ... sediments contained about 10,000 times as much carbon as would have been expected. The layer, sampled in Denmark, Spain, and New Zealand, was the one in which other scientists previously ...

... its $10 million effort to determine whether a hole in the Earth's protective ozone layer was developing over the North Pole, was delayed by mechanical problems in both the project ... chief scientist as saying three ER-2 planes would be used to survey the ozone layer at high altitudes. (B Sun, Nov 9/91; NY Times, Nov 10/91) The Baltimore ... same time, hydroxyl played a vital role in stemming depletion of the Earth's ozone layer. (B Sun, Nov 9/91) October 1991 October November 1991 November Nov 1 1991 1 ...

... scientist, provided the first evidence of a summertime thinning of the Earth's protective ozone layer over parts of the Northern Hemisphere, including the United States. The findings were based on ... in a briefing. Evidence showed three percent of the summertime ozone layer and six percent of the winter-time ozone layer were lost over the middle-latitude regions during the 1980s; similar ...

... were slowing sooner than researchers had expected, and the gradual repair of Earth's ozone layer could begin by 2000. This news came as NASA satellite data indicated that the stratospheric ozone layer that shields the Forth from cancer causing ultraviolet radiation had dropped to its lowest levels ...

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