Abstract—

The article reviews the main publications from the last eight years on long-term trends in the parameters of the middle atmosphere, thermosphere, and ionosphere. It is shown that the negative temperature trends in the middle atmosphere have been reliably established based on observations by various methods. An analysis of satellite orbits in the thermosphere showed negative density trends at heights of ~400 km. Unexpectedly high negative trends in ion temperature Ti above ~220 km obtained with the incoherent-scatter method. The same measurements high positive trends in Ti at the heights of the F1 layer. There are discrepancies in the estimates of the absolute value of the negative trends in the critical frequency and height of the F2 layer; however, these trends are high in the opinion of the authors.

中文翻译：

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中高层大气和电离层参数的长期变化（综述）

摘要—

本文回顾了过去八年中有关中层大气，热层和电离层参数长期趋势的主要出版物。结果表明，基于各种方法的观测，已经可靠地确定了中层大气的负温度趋势。对热圈中卫星轨道的分析显示，在约400 km的高度处密度密度呈负趋势。用非相干散射法获得的离子温度Ti异常高的负趋势，超过〜220 km。相同的测量结果表明，在F 1层的高度处Ti的高正趋势。F的临界频率和高度的负面趋势的绝对值的估计值存在差异2层; 但是，作者认为这些趋势很高。