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  • 1
    Publication Date: 2011-08-17
    Description: Large-scale reductions in the ozone content of the middle and upper stratosphere over the polar cap regions were associated with the major solar proton event of 4 August 1972. This reduction, which was determined from measurements with the backscattered ultraviolet experiment on the Nimbus 4 satellite, is interpreted as being due to the catalytic destruction of ozone by odd-nitrogen compounds (NOx) produced by the event.
    Keywords: GEOPHYSICS
    Type: Science; 197; Aug. 26
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  • 2
    Publication Date: 2011-08-16
    Description: A mid-latitude northern hemisphere model of the daytime ozone distribution in the troposphere, stratosphere, and lower mesosphere has been constructed. Data from rocket soundings in the latitude range of 45 deg N + or - 15 deg N, results of balloon soundings at latitudes from 41 to 47 deg N, and latitude gradients from satellite ozone observations have been combined to produce estimates of the annual mean ozone concentration and its variability at heights up to 74 km for an effective latitude of 45 deg N. This model is a revision for heights above 26 km of the tentative mid-latitude ozone model, included in the U.S. Standard Atmosphere Supplements, 1966, and has been adopted for use in the U.S. Standard Atmosphere, 1976.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 81; Aug. 20
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  • 3
    Publication Date: 2011-08-17
    Description: A rocket carrying an optical ozonesonde was launched at 1822 GMT on Sept. 29, 1977 in support of the STRATCOM 8 balloon. The integral ozone amount above the balloon ceiling altitude of 40 km was measured as .0117 atm-cm with an uncertainty less than + or - 7%. The ozone density at 40 km was 6.77 x 10 to the 17th power mol/cu m. Ozone densities in molecules/cu m at higher altitudes were 2.28 x 10 to the 17th power at 45 km, 6.72 x 10 to the 16th power at 50 km, 2.20 x 10 to the 16th power at 55 km, and 7.26 x 10 to the 15th power at 60 km. In addition, the ozone distribution was measured at lower altitudes from the tropopause at 17 km to 40 km.
    Keywords: GEOPHYSICS
    Type: STRATCOM 8 Data Workshop and Suppl.; p 49-55
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  • 4
    Publication Date: 2019-07-13
    Description: During the period March 1977 through May 1977, three regular monthly ozone profiles were measured at Wallops Flight Center and three regular monthly ozone profiles were measured at the Churchill Research Range. One additional flight was conducted at Wallops Flight Center in support of Nimbus 4 SBUV. Data results and flight profiles for the period covered are presented.
    Keywords: GEOPHYSICS
    Type: NASA-TM-73283
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  • 5
    Publication Date: 2019-07-13
    Description: During the period December 1976 through February 1977, three regular monthly ozone profiles were measured at Wallops Flight Center, two special soundings were taken at Antigua, West Indies, and at the Churchill Research Range, monthly activities were initiated to establish stratospheric ozone climatology. This report presents the data results and flight profiles for the period covered.
    Keywords: GEOPHYSICS
    Type: NASA-TM-69365
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  • 6
    Publication Date: 2019-07-13
    Description: The Backscatter Ultraviolet (BUV) experiment on board the Nimbus 4 polar orbiting satellite has been measuring the total ozone content and high-level atmospheric ozone profiles since early 1970. Synoptic type analyses of these data are now being accomplished and compared with appropriate constant-pressure analyses of stratospheric circulation. Ozone changes during a stratospheric warming of early 1971 are investigated by comparison with circulation changes in the layer between 30 mb (24 km) and 2 mb (42 km). A general increase in ozone concentrations, more pronounced in the higher latitudes, is noted during the warming period. Plans for future investigation are discussed, including analysis of ozone observations beginning from 1970 on every two-day basis for comparison with constant-pressure height, temperature, and wind charts analyzed with the aid of radiosonde, rocketsonde, and satellite data.
    Keywords: GEOPHYSICS
    Type: Open Meetings of Working Groups on Physical Sciences; May 29, 1975 - Jun 07, 1975; Varna; Bulgaria|Symposium and Workshop on Results from Coordinated Upper Atmosphere Measurement Programs; May 29, 1975 - May 31, 1975
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  • 7
    Publication Date: 2019-07-13
    Description: Previous atmospheric ozone observations using an ultraviolet double monochromator to measure the absorption of back-scattered solar radiation between 255 nm and 340 nm have provided information on the global total ozone distribution as well as its vertical profile. This information can be used to structure the comprehensive ozone observations that are needed to provide a better understanding of ozone formation and destruction mechanisms. Some potential ozone threats, especially that from photodissociation of fluorocarbons, make Shuttle-based observations especially timely. Because of the nature of the global ozone-transport process, measurements must be performed from space on a global scale with sufficient resolution and accuracy to determine the total amount of atmospheric ozone. A better understanding of ozone processes in global regions inaccessible from previous platforms is needed to complete this ozone data base. This paper describes the potential for Shuttle payloads to provide the required information.
    Keywords: GEOPHYSICS
    Type: AAS PAPER 75-231 , Meeting on Space Shuttle Missions of the 80''s; Aug 26, 1975 - Aug 28, 1975; Denver, CO
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