27-day solar cycles of zonal wind in the troposphere and lower stratosphere

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2025-07-19 DOI:10.1016/j.jastp.2025.106597

I.G. Zakharov, L.F. Chernogor

引用次数: 0

Abstract

The influence of 27-day solar activity cycles on the zonal wind in the troposphere and lower stratosphere of the Northern Hemisphere has been investigated. Significant zonal wind anomalies, closely related to global atmospheric circulation cells, have been identified: wind variations are maximal in the central parts of the cells and change sign at their boundary. The amplitude of the 27-day wind variations is ∼8 m/s in the extratropical troposphere and several times smaller in the tropics. The solar effect is maximal over Europe and North America, in antiphase to each other. The maximum changes in wind with height occur in the upper troposphere. The results can be explained by a two-way dynamic (wave-like) troposphere–stratosphere coupling, transferring the solar influence from the stratosphere to the troposphere.

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对流层和平流层下部纬向风的27天太阳周期

本文研究了27天太阳活动周期对北半球对流层和平流层低层纬向风的影响。发现了与全球大气环流单体密切相关的显著纬向风异常：风的变化在单体的中心部分最大，并在其边界发生变化。27天风的变化幅度在温带对流层为~ 8 m/s，在热带地区则小几倍。太阳的影响在欧洲和北美是最大的，互为反相。风随高度的最大变化发生在对流层上层。结果可以用对流层-平流层的双向动态耦合（波状）来解释，将太阳的影响从平流层转移到对流层。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Atmospheric and Solar-Terrestrial Physics 地学-地球化学与地球物理

CiteScore

4.10

自引率

5.30%

发文量

审稿时长

6 months

期刊介绍： The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them. The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions. Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.