A semiannual variation of ozone in the middle mesosphere observed with the millimeter-wave radiometer at Tsukuba, Japan
A semiannual variation of ozone in the middle mesosphere observed with the millimeter-wave radiometer at Tsukuba, Japan
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DOI：
10.1029/2003jd003724
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发表时间：
2003-11
影响因子：
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通讯作者：
T. Nagahama;H. Nakane;Y. Fujinuma;H. Ogawa;A. Mizuno;Y. Fukui
中科院分区：
文献类型：
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作者：
T. Nagahama;H. Nakane;Y. Fujinuma;H. Ogawa;A. Mizuno;Y. Fukui
[1] 自1996年10月起，日本筑波毫米波辐射计（北纬36.1°，东经140.1°）连续观测了海拔38~76 km的臭氧垂直廓线，分析了不同海拔高度臭氧的时间变化，首次明确了56~68 km的半年变化特征。该地区臭氧混合比在1月和7月达到峰值，60公里处半年变化幅度估计为年平均值的13%，约为76公里处观测值28%的一半。 56至76 km的半年变化相位在68 km附近突然反转，表明臭氧的这些半年变化不是由任何类型的波的传播引起的，而是由68 km以上和以下区域的不同机制引起的。
[1] Continuous observations of the vertical ozone profiles between 38 and 76 km in altitude have been made with the millimeter-wave radiometer at Tsukuba, Japan (36.1°N, 140.1°E) since October 1996. We analyzed temporal variations of ozone at various altitudes and first identified clearly the features of a semiannual variation between 56 and 68 km. The ozone mixing ratio in this region peaks in January and July, and the amplitude of the semiannual variation at 60 km was estimated to be 13% of the annual average, which is about half the value of 28% observed at 76 km. The phase of the semiannual variation from 56 to 76 km inverts suddenly at around 68 km, suggesting that these semiannual variations of ozone are not induced by the propagation of any kind of wave but are caused by different mechanisms in the regions above and below 68 km.