Modeling the impact of solar activity variations on global atmospheric circulation-Reference-Cited by-同舟云学术

Modeling the impact of solar activity variations on global atmospheric circulation

Published:2024-06-25 Issue:2 Volume:10 Page:111-118
ISSN:2500-0535
Container-title:Solar-Terrestrial Physics
language:en
Short-container-title:

Author:

Koval Andrey¹,Gavrilov Nikolay²,Golovko Anastasiya³,Didenko Kseniia⁴³,Ermakova Tatiana⁵³

Affiliation:

1. Saint Petersburg State University

2. Saint-Petersburg State University

3. St. Petersburg University

4. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation RAS

5. Russian State Hydrometeorological University

Abstract

In this study, we continue a series of works devoted to modeling and studying the sensitivity of global atmospheric dynamic processes to variations in solar emissions during the 11-year solar activity (SA) cycle. We focus on studying the response of meridional atmospheric circulation in the middle atmosphere to changes in thermosphere characteristics with changes in SA. For this purpose, numerical simulations of the general atmospheric circulation were carried out using the nonlinear numerical circulation model of the middle and upper atmosphere MUAM. The main mechanism of the influence of thermospheric disturbances on the underlying layers is assumed to be a change in the conditions of propagation and reflection of planetary waves (PWs) due to changes in SA. Changes in temperature, zonal and meridional wind are shown to localize along waveguides, demonstrating the significant role of PWs in transmitting thermospheric disturbances, caused by changes in SA, to the middle atmosphere. The magnitude of changes in meridional circulation can reach 10 % in the northern stratosphere between SA maxima and minima.

Publisher

Infra-M Academic Publishing House

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