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Na原子可以作为大气动力学过程(如潮汐波、重力波等)的示踪剂,因而对Na层的探测研究成为研究中层顶区的重要手段. 本文建立了时变的中高层大气光化学模式,并与国际电离层模式 (IRI 95) 与Na层光化学理论相结合,建立完整时变的中高层大气Na层光化学模式,着重研究Na层分布的昼夜变化. 计算结果表明,在Na原子分布的峰值附近,Na层不出现大的昼夜变化,而在Na层的上部和下部,Na原子密度存在明显的昼夜变化. 这些特性与实际的观测结果比较一致. 相似文献
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The criterion of gravity wave instability induced by photochemistry in summer polar mesopause region
This paper studies the effect of photochemistry on the gravity wave instability in summer polar mesopause region. The calculation
method of the effects of eddy viscosity, conductivity and eddy diffusion of chemical species on the gravity wave instability
induced by photochemistry are studied. The critical wavelength of the instability is given in this paper. The influences of
some parameters on it are discussed. The study shows that the gravity wave instability induced by photochemistry is sensitive
to the temperature and atomic oxygen profiles. 相似文献
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