ATMOSPHERIC NITROGEN DIOXIDE IN ANTARCTICA
スポンサーリンク
概要
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Seasonal behavior of stratospheric NO_2 content was determined for the period of March 1983 to January 1984 from ground-based spectroscopic measurements at Syowa Station. The winter minimum of about 1×(10)^<15>(cm)^<-2> and the summer maximum of about 7×(10)^<15>(cm)^<-2> were observed. This seasonal behavior compares well with those observed at northern high latitudes. A rapid increase in column density started at the end of September before the minimum of total ozone in mid-October. This increase in column density seems to correlate with an increase in sunlit time in the stratosphere. Our results imply that both dynamical and photochemical processes may be involved in the Antarctic ozone depletion. The first balloon observation of stratospheric NO_2 profile in Antarctica was made on November 24,1982 and two observations on November 12 and 20,1983 at Syowa Station. All observations were concentrated in November, early summer in Antarctica. Two vertical profiles, sunset and sunrise ones, could be deduced in series from one balloon flight. They should be virtually the same rather than corresponding to different profiles for the evening and morning, because, in this season of year, the sunlit condition lasted all day long at the balloon altitude. No quantitative change can be seen in profiles between 1982 and 1983. Above 25km altitude, three profiles are basically identical to those observed at middle and high latitudes in the northern hemisphere.
- 国立極地研究所の論文
著者
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Iwagami N
Univ. Tokyo Tokyo Jpn
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Iwagami Naomoto
Geophysics Research Laboratory Faculty Of Science University Of Tokyo
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Iwagami Naomoto
Department Of Earth And Planetary Physics University Of Tokyo
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Shibasaki Kazuo
Kokugakuin University
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Ogawa Toshihiro
Geophysics Research Lavoratory, University of Tokyo
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Ogawa Toshihiro
Geophysics Research Laboratory Faculty Of Science University Of Tokyo
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SHIBASAKI Kazuo
Faculty of Literature, kokugakuin University
関連論文
- Upper atmosphere physics data, Syowa Station, 1983 (Upper Atmosphere Physics 3)
- A balloon observation of stratospheric nitrogen dioxide over Syowa Station, Antarctica (abstract)
- ATMOSPHERIC NITROGEN DIOXIDE IN ANTARCTICA
- Measurements of NO2 in the polar stratosphere: Preliminary results by balloon experiments at Syowa Station in 1983 (extended abstract)
- Balloon measurement of the stratospheric NO2 by the 23rd Japanese Antarctic Research Expedition (abstract)
- Measurement of NO2 density in the polar stratosphere: Balloon experiment by the 23rd Japanese Antarctic Research Expedition (extended abstract)
- UPPER ATMOSPHERE PHYSICS DATA, SYOWA STATION, 1983
- Spectroscopic Study of the Nitrogen Airglow
- Polar thermosphere-stratosphere photochemical coupling experiment : Two rocket measurements in polar winter at 69°N
- INFRARED SPECTROSCOPIC MEASUREMENT AT SYOWA STATION
- Observation of atmospheric minor constituents in the Antarctic region by ground-based adsorption spectroscopy (extended abstract)
- Comparison of total ozone over Syowa Station between NIMBUS 7 TOMS version 6 data and Dobson data (abstract)