调查2012年太阳耀斑对雷索特湾地磁场的影响：比较统计分析

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2025-05-19 DOI:10.1016/j.jastp.2025.106544

V.S. Gopika , V. Blessy , V.A. Asha , N. Ankitha , P. Syamily , S. Amrutha , B.C. Sibi , S. Lekshmi , C. Jim , U. Rekha , M.J. Tiju , A. Abraham

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引用次数: 0

摘要

本文研究了2012年太阳耀斑及其对高纬度站Resolute Bay （RES）地磁扰动的影响。利用垂直方差（VV）方法，分析强调太阳耀斑后的地磁场扰动受到太阳风速度x分量的急剧变化以及太阳耀斑x射线通量和行星际磁场（IMF）的强烈影响。由于太阳风-磁层系统的非线性特性，使得难以估计各种行星际参数对地磁活动的相对影响。本工作通过采用线拟合相关系数来评估和比较太阳风速度和太阳耀斑通量的影响，解决了这一挑战。结果表明，与太阳耀斑通量的变化相比，太阳风速度x分量的波动对地磁扰动的影响更大。此外，还证实了IMF的z分量在调制地磁活动中的作用。研究发现，当国际货币基金组织向南移动时，西南偏转速度的突然变化会对地磁场产生强烈干扰。该研究为太阳风-磁层耦合动力学提供了新的见解，并促进了我们对太阳活动驱动的地磁扰动的理解。

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Investigating the impact of solar flares on the geomagnetic field at Resolute Bay in 2012: A comparative statistical analysis

This study examines the solar flares of 2012 and their effects on geomagnetic disturbances at the high-latitude station Resolute Bay (RES). Employing the Vertical Variance (VV) method, the analysis highlights that geomagnetic field perturbations following solar flares are strongly influenced by sharp variations in the X-component of the solar wind speed, along with the solar flare X-ray flux and the Interplanetary Magnetic Field (IMF).

The characteristic nonlinearity of the solar wind-magnetosphere system makes it difficult to estimate the relative influence of the various interplanetary parameters that impact the geomagnetic activity. This work addresses this challenge by employing line-fit correlation coefficients to assess and compare the effects of the solar wind speed and solar flare flux. The findings demonstrate that fluctuations in the X-component of solar wind speed exert a greater influence on geomagnetic disturbances than variations in solar flare flux. Additionally, the role of the Z-component of the IMF in modulating geomagnetic activity is substantiated. Abrupt changes in the SW speed occurring when the IMF is southward are found to produce strong disturbances in the geomagnetic field. The study provides new insights into the dynamics of solar wind-magnetosphere coupling and advances our understanding of geomagnetic disturbances driven by solar activity.

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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.