Long-Term Changes in the Activity of Wave Disturbances in the Mesopause Region

IF 0.7 4区地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Doklady Earth Sciences Pub Date : 2024-09-16 DOI:10.1134/s1028334x24603511

V. I. Perminov, N. N. Pertsev, V. A. Semenov, P. A. Dalin, V. A. Sukhodoev

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Abstract

Long-term trends and dependences on solar activity were derived for wave disturbances at mesopause altitudes (80−100 km) based on temperature variations obtained by spectral observations of the hydroxyl airglow at the Zvenigorod Science Station, Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, in 2000−2024, as well as by methods of statistical analysis. Their activities were determined by digital frequency filtering in three regions of wave periods, such as 0.7−2.0, 1.4−4.1, and 2.7−8.2 h with maxima at 1, 2, and 4 h. The root-mean-square values of temperature half-differences served as an indicator of wave activity. Both year-round and average seasonal (winter and summer) values were analyzed. According to the study results, the wave activity is characterized by positive trends with their dependence on the frequency band of disturbances (in winter, the trend is greater in the high-frequency band, and in summer, the trend is greater in the low-frequency band). The dependence on solar activity is positive. Its values are greater for the high-frequency band of disturbances, as well as in winter.

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中顶点地区扰动波活动的长期变化

摘要根据俄罗斯科学院奥布霍夫大气物理研究所兹韦尼戈罗德科学站 2000-2024 年羟基气辉光谱观测所获得的温度变化以及统计分析方法，得出了中顶点高度（80-100 公里）波扰动的长期趋势和与太阳活动的关系。通过数字频率滤波确定了波浪周期的三个区域，如 0.7-2.0、1.4-4.1 和 2.7-8.2 h，最大值分别为 1、2 和 4 h。分析了全年和季节（冬季和夏季）平均值。研究结果表明，波浪活动的特点是呈正趋势，并与扰动的频带有关（冬季，高频段的趋势更大，夏季，低频段的趋势更大）。太阳活动呈正相关。其数值在高频扰动频段和冬季更大。

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来源期刊

Doklady Earth Sciences 地学-地球科学综合

CiteScore

1.40

自引率

22.20%

发文量

138

审稿时长

3-6 weeks

期刊介绍： Doklady Earth Sciences is a journal that publishes new research in Earth science of great significance. Initially the journal was a forum of the Russian Academy of Science and published only best contributions from Russia. Now the journal welcomes submissions from any country in the English or Russian language. Every manuscript must be recommended by Russian or foreign members of the Russian Academy of Sciences.