Stratospheric nitrogen dioxide observed by ground-based and balloon-borne techniques at Syowa Station (69.0°S, 39.6°E)
Stratospheric nitrogen dioxide observed by ground-based and balloon-borne techniques at Syowa Station (69.0°S, 39.6°E)
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在昭和站（69.0°S，39.6°E）通过地面和气球技术观测到的平流层二氧化氮
DOI：
10.1029/gl013i012p01268
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发表时间：
1986
影响因子：
5.2
通讯作者：
T. Ogawa
中科院分区：
文献类型：
--
作者：
K. Shibasaki;N. Iwagami;T. Ogawa
用地面可见吸收光谱法测定了1983年3月~ 1984年1月南极Syowa站（69.0°S, 39.6°E）平流层NO2垂直柱密度的季节变化。冬季最小值约为1×1015 cm−2，夏季最大值为7×1015 cm−2。这些数值几乎等于或略小于在北部高纬度地区观测到的数值。从秋季到早春，柱密度夜间衰减较小。在总臭氧含量在10月中旬达到最小值之前，9月底出现了柱密度的快速增加。这表明南极臭氧耗竭可能涉及动力和光化学两个过程。1982年11月和1983年11月在南极Syowa站进行的三次气球观测揭示了南极初夏平流层NO2的垂直剖面。在海拔25公里以上，这些剖面与在北半球中高纬度地区观测到的基本相同。在25 km以下的平流层下部，由于动力效应，NO2密度的变化似乎很大。
Seasonal variation of vertical column density of stratospheric NO2 was determined for the period of March 1983 to January 1984 by means of ground-based visible absorption spectroscopy at Syowa Station (69.0°S, 39.6°E), Antarctica. The winter minimum of about 1×1015 cm−2 and the summer maximum of 7×1015 cm−2 were observed. These values are nearly equal to, or a little bit smaller than, those observed at northern high latitudes. The nighttime decay of column density was small from autumn to early spring. A rapid increase in column density occurred at the end of September before the minimum of total ozone content in mid-October. This behavior suggests that both dynamical and photochemical processes may be involved in the Antarctic ozone depletion. The vertical profile of stratospheric NO2 in early summer in Antarctica was revealed by three balloon-borne measurements over Syowa Station in November 1982 and 1983. Above 25 km altitude, these profiles are basically identical to those observed at middle and high latitudes in the northern hemisphere. In the lower stratosphere below 25 km, variability in NO2 density seems to be large due to dynamical effects.