In this paper, we study the response of the mesosphere–lower thermosphere (MLT) to sudden stratospheric warmings (SSWs) and the activity of planetary waves (PWs). We observe the 557.7 nm optical emission to retrieve the MLT wind and temperature with the only Fabry–Perot interferometer (FPI) in Russia. The FPI is located at the mid latitudes of eastern Siberia within the Tory Observatory (TOR) at the Institute of Solar-Terrestrial Physics of the Siberian Branch of the Russian Academy of Sciences (ISTP SB RAS, 51.8^∘ N, 103.1^∘ E). Regular interferometer monitoring started in December 2016. Here, we address the temporal variations in the 557.7 nm emission intensity as well as the variations in wind and temperature measured during the 2016–2020 winters. Both SSWs and PWs appear to have equally strong effects in the upper atmosphere. When the 557.7 nm emission decreases due to some influences from below (SSWs or PWs), the temperature increases significantly, as does its variability. The dispersion of zonal wind does not show significant PW- and SSW-correlated variations, but the dominant MLT zonal wind reverses during major SSW events simultaneously with the averaged zonal wind at 60^∘ N in the stratosphere.

中文翻译：

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法布里-珀罗干涉仪观测到冬季中纬度对平流层对中层低层热层的影响

在本文中，我们研究了中层低层热层（MLT）对平流层突然变暖（SSWs）和行星波活动（PWs）的响应。我们观察到557.7 nm的光发射，使用俄罗斯唯一的法布里-珀罗干涉仪（FPI）来检索MLT风和温度。该FPI位于北纬西伯利亚东部的保守党天文台（TOR）在俄罗斯科学院西伯利亚分院日地物理研究所（ISTP SB RAS，51.8内的中期^∘  N，103.1 ^∘ E）。干涉仪的常规监测始于2016年12月。在这里，我们解决了557.7 nm发射强度的时间变化以及2016-2020年冬季期间测得的风和温度的变化。SSW和PW在高层大气中似乎都具有同样强大的作用。当557.7 nm的发射由于来自下方（SSW或PW）的某些影响而降低时，温度及其可变性也会显着升高。纬向风的散布没有显示出与PW和SSW相关的显着变化，但在主要SSW事件期间 ，与平流层平均纬向风在^60∘N的同时，主要的MLT纬向风逆转。