Ozone-rich transients in the upper equatorial Atlantic troposphere
Article Abstract:
Five commercial airline jets operated by three airliner firms used special instruments to measure ozone, temperature, and humidity in a region over the tropical Atlantic Ocean between Europe and South America in the course of over 100 flights. The indicated measurements frequently encountered, transient pockets with ozone-rich concentrations of 100-500 parts per billion by volume at an altitude of 10-12 kilometers. The findings imply that these ozone-rich pockets originate from the stratosphere and that the ozone concentration of the equatorial troposphere is not as understood as has previously been assumed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Observational evidence for chemical ozone depletion over the Arctic in winter 1991-92
Article Abstract:
A new approach to calculate chemical ozone destruction rates that facilitate comparisons of ozone concentrations in specific air parcels at different times has been described. During arctic winter of 1991-92 the frequency of the formation of polar stratospheric clouds (PSCs) increased between early December until mid January. A minor warming occurred at this time which inhibited further large scale formation of PSCs. CIO measurements by the Upper Atmosphere Research Satellite Microwave Limb Sounder instrument had showed a high level of CIO (up to 2.5 p.p.b.v. at 19 km altitude) in the vortex.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Seasonal cycle of surface ozone over the western North Atlantic
Article Abstract:
Fluctuations in tropospheric ozone levels over the western North Atlantic probably result from natural atmospheric circulation rather than from pollution. Some environmentalists have feared that air pollution from North America and Europe might be adding to ozone over the North Atlantic. However, measurements taken over Bermuda and Barbados indicate that the sometimes elevated ozone levels were caused by ozone being brought down from the uncontaminated upper troposphere. In general, Barbados and Bermuda's ozone levels were less than the US and Canada's levels.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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