美国加利福尼亚州弗雷斯诺上空地磁风暴期间的地面和空间地球电场分析:小波相干方法

IF 1.6 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
A. Giri, B. Adhikari, C. Idosa, D. Pandit
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引用次数: 0

摘要

太阳风与地球磁层和电离层相互作用,造成扰动,在地球表面形成地电场。这些地电场将磁层和电离层事件联系起来,影响近地环境。在本研究中,我们分析了 2014 年 2 月 19 日(中等强度事件)、2015 年 3 月 17 日(强强度事件)和 2016 年 3 月 17 日(弱强度事件)三次不同强度的地磁暴期间美国加利福尼亚州弗雷斯诺上空的地基和天基地球电场。我们采用时间序列分析和小波相干性分析(WTC)来分析波动,并研究地磁暴和地电场时间序列数据之间的关联强度和相位关系。我们观察到,与天基观测相比,地基磁场和电场波动呈现出明显的趋势。永利国际娱乐表明,与 EYt(地基电场)相比,Ey(空间电场)在太阳参数的作用下显示出更多的增强功率区域。这归因于太阳风的影响,太阳风影响地面电场,但对空间电场的影响较小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Analysis of ground and space geoelectric field during geomagnetic storms over Fresno, CA USA: wavelet coherence approach

Analysis of ground and space geoelectric field during geomagnetic storms over Fresno, CA USA: wavelet coherence approach

The solar wind interacts with the earth magnetosphere and ionosphere, causing disturbances that create geoelectric fields in the Earth’s surface. These geoelectric fields link magnetospheric and ionospheric events, affecting the near-Earth environment. In the present study, we analyzed the ground- and space-based geoelectric field over Fresno, California, USA during three geomagnetic storms of different intensities, 19th February 2014 (moderate event), 17th March 2015 (intense event), and 17th March 2016 (weak event). We employed time series analysis and wavelet coherence analysis (WTC) to analyze fluctuations and investigate the strength of association and phase relationship between time series data of geomagnetic storms and geoelectric fields. We observed that ground-based magnetic and electric field fluctuations exhibited a distinct trend compared to space-based observations. WTC indicates that Ey (Space based Electric field) exhibits comparatively more enhanced power regions with solar parameters than EYt (Ground based elecrtic field). This is attributed to the impact of solar winds, which affect the ground electric field but have a less significant effect on the electric field in space.

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来源期刊
Indian Journal of Physics
Indian Journal of Physics 物理-物理:综合
CiteScore
3.40
自引率
10.00%
发文量
275
审稿时长
3-8 weeks
期刊介绍: Indian Journal of Physics is a monthly research journal in English published by the Indian Association for the Cultivation of Sciences in collaboration with the Indian Physical Society. The journal publishes refereed papers covering current research in Physics in the following category: Astrophysics, Atmospheric and Space physics; Atomic & Molecular Physics; Biophysics; Condensed Matter & Materials Physics; General & Interdisciplinary Physics; Nonlinear dynamics & Complex Systems; Nuclear Physics; Optics and Spectroscopy; Particle Physics; Plasma Physics; Relativity & Cosmology; Statistical Physics.
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