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    Seasonal Variations of NO and 03 at Altitudes of 18.3 and 21.3 km

    Source: Journal of the Atmospheric Sciences:;1975:;Volume( 032 ):;issue: 011::page 2185
    Author:
    Loewenstein, Max
    ,
    Savage, H. F.
    ,
    Whitten, R. C.
    DOI: 10.1175/1520-0469(1975)032<2185:SVONAA>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Nitric oxide and ozone concentrations have been measured in situ from a high-altitude research aircraft based at the NASA Ames Research Center. Data which show the variations of NO and 03 with the time of year are presented for altitudes of 18.3 and 21.3 km. The extreme values of the observed NO concentrations at 21.3 km are 1.2?109 cm?3 in summer and 2?108 cm?3 in winter. At 18.3 km the extreme values are 1.6?109 cm?3 in summer and 1?108 cm?3 in winter. The smoothed NO seasonal data show a variation of about a factor of 2.5 at 21.3 km and a factor of 4 at 18.3 km. The ozone data show the generally expected magnitude and seasonal variation. We have used a photochemical model employing the measured ozone concentrations, the mean solar zenith angle, and seasonal HNO3 data reported by others to predict the seasonal NO variation at 20 km. The result is a summer-to-winter NO ratio of 2.5 which is in fair agreement with the observed ratios.
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      Seasonal Variations of NO and 03 at Altitudes of 18.3 and 21.3 km

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4152786
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    contributor authorLoewenstein, Max
    contributor authorSavage, H. F.
    contributor authorWhitten, R. C.
    date accessioned2017-06-09T14:18:33Z
    date available2017-06-09T14:18:33Z
    date copyright1975/11/01
    date issued1975
    identifier issn0022-4928
    identifier otherams-16947.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4152786
    description abstractNitric oxide and ozone concentrations have been measured in situ from a high-altitude research aircraft based at the NASA Ames Research Center. Data which show the variations of NO and 03 with the time of year are presented for altitudes of 18.3 and 21.3 km. The extreme values of the observed NO concentrations at 21.3 km are 1.2?109 cm?3 in summer and 2?108 cm?3 in winter. At 18.3 km the extreme values are 1.6?109 cm?3 in summer and 1?108 cm?3 in winter. The smoothed NO seasonal data show a variation of about a factor of 2.5 at 21.3 km and a factor of 4 at 18.3 km. The ozone data show the generally expected magnitude and seasonal variation. We have used a photochemical model employing the measured ozone concentrations, the mean solar zenith angle, and seasonal HNO3 data reported by others to predict the seasonal NO variation at 20 km. The result is a summer-to-winter NO ratio of 2.5 which is in fair agreement with the observed ratios.
    publisherAmerican Meteorological Society
    titleSeasonal Variations of NO and 03 at Altitudes of 18.3 and 21.3 km
    typeJournal Paper
    journal volume32
    journal issue11
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1975)032<2185:SVONAA>2.0.CO;2
    journal fristpage2185
    journal lastpage2190
    treeJournal of the Atmospheric Sciences:;1975:;Volume( 032 ):;issue: 011
    contenttypeFulltext
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