International collaborative observations of zonal variability in the bottom of the upper atmosphere

利用钠激光雷达的气辉成像、温度和成分观测的小尺度特征揭示了100 km左右高空大气底部的纬向结构。我们发现了显著的纬向变异，但同时也可以讨论几度纬向差异的影响。在今后的计划中，中间层和低层热层的二维制图将变得非常重要。

Zonal structures in the bottom of the upper atmosphere region at around 100 km altitude have been revealed by small-scale features in the airglow imaging, temperature and constituent observations by sodium lidars. We found a significant zonal variability, but at the same time, effect of latitudinal difference of several degrees can also be discussed. Two-dimensional mapping in the mesosphere and lower thermosphere will become very important in the future programs.