Ionospheric Effects of the June 10, 2021, Solar Eclipse in the Arctic

IF 0.5 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS Kinematics and Physics of Celestial Bodies Pub Date : 2022-08-02 DOI:10.3103/S088459132204002X

L. F. Chernogor, Yu. B. Mylovanov

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引用次数: 2

Abstract—

Solar eclipses (SEs) cause a variety of processes in all geospheres. There is a decrease of electron density, as well as electron, ion, and neutral temperature, in the ionosphere; the dynamics of ionospheric plasma changes significantly, wave disturbances are generated, and the interaction between subsystems in the Earth–atmosphere–ionosphere–magnetosphere system increases. It has been proven that SE effects depend on the solar eclipse magnitude, geographical coordinates, time of day, season, atmospheric and space weather conditions, position in the solar cycle, and other factors. In addition to recurring or regular effects, there are effects specific to a given SE. For this reason, the study of physical processes in all geospheres caused by SEs is an urgent interdisciplinary problem. The purpose of this work is to present the results of the observation and analysis of time disturbances of the vertical total electron content (TEC) in the Arctic. The data used in this study include the parameters of signals received by a network of stations from navigation satellites passing over the Moon’s shadow, where the SE magnitude was approximately 0.9 in the latitude range 70…80° N. The annular solar eclipse of June 10, 2021, began at 08:12:20 UT and ended at 13:11:19 UT. The Moon’s shadow appeared first over Canada then moved across Greenland, the Arctic Ocean, the North Pole, and the New Siberian Island. The Moon’s shadow covered the northern part of the Russian Federation. Partial SE was observed in northern and middle parts of Europe, most of the Russian Federation, Mongolia, and China. Using 11 ground stations that received GPS signals from 8 satellites, the authors studied the spatial and temporal variations of the TEC during the maximum coverage of the solar disk, which was observed in the Arctic, and found the following. The decrease in electron density for each station and each satellite was observed almost immediately after the beginning of SE and lasted approximately 60…100 min. The minimum TEC value was then detected, followed by an increase to the initial value or higher. The average TEC was 6.4…10.4 TECU. The average decrease in TEC was 2.3 ± 0.6 TECU from 8.4 ± 1.6 TECU. In relative units, the decrease ranged –16.5…–46% (average value –30 ± 9.7%). The time delay between the start of the minimum TEC value relative to the maximum SE magnitude was determined. It varied within 5…30 min (mean value was 18.3 ± 8.5 min). In some cases, quasi-periodic variations in TEC with a period of 9…15 min and a relative amplitude of 3…5% were observed during the SE.

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2021年6月10日北极日食对电离层的影响

日食(SEs)在各个地球圈中引起各种各样的过程。电离层中的电子密度降低，电子、离子和中性温度也降低;电离层等离子体动力学发生显著变化，产生波扰动，地球-大气-电离层-磁层系统各子系统之间的相互作用增强。事实证明，东偏角效应与日食星等、地理坐标、时间、季节、大气和空间天气条件、太阳活动周期中的位置等因素有关。除了反复出现或有规律的影响外，还有特定于给定SE的影响。因此，研究地球物理过程是一个迫切需要解决的跨学科问题。本文介绍了北极地区垂直总电子含量(TEC)时间扰动的观测和分析结果。本研究中使用的数据包括导航卫星网络从经过月球阴影的卫星接收到的信号参数，在纬度70 ~ 80°n范围内，东南等约为0.9。2021年6月10日的日环食开始于08:12:20 UT，结束于13:11:19 UT。月亮的影子首先出现在加拿大上空，然后穿过格陵兰岛、北冰洋、北极和新西伯利亚岛。月亮的阴影覆盖了俄罗斯联邦的北部。欧洲北部和中部、俄罗斯联邦大部分地区、蒙古和中国观测到偏南偏南。利用11个地面站接收来自8颗卫星的GPS信号，作者研究了在北极观测到的太阳日盘最大覆盖期间TEC的时空变化，发现如下:在东南开始后，几乎立即观察到每个站点和每个卫星的电子密度下降，持续时间约为60 ~ 100 min。然后检测到最小TEC值，然后增加到初始值或更高。平均TEC为6.4 ~ 10.4 TECU。TEC从8.4±1.6 TECU平均下降2.3±0.6 TECU。相对单位下降幅度为-16.5 ~ -46%(平均值-30±9.7%)。确定了最小TEC值相对于最大SE量级开始之间的时间延迟。其变化范围为5 ~ 30 min，平均值为18.3±8.5 min。在某些情况下，在东南期间观察到TEC的准周期变化，周期为9 ~ 15 min，相对幅度为3 ~ 5%。

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来源期刊

Kinematics and Physics of Celestial Bodies ASTRONOMY & ASTROPHYSICS-

CiteScore

0.90

自引率

40.00%

发文量

审稿时长

>12 weeks

期刊介绍： Kinematics and Physics of Celestial Bodies is an international peer reviewed journal that publishes original regular and review papers on positional and theoretical astronomy, Earth’s rotation and geodynamics, dynamics and physics of bodies of the Solar System, solar physics, physics of stars and interstellar medium, structure and dynamics of the Galaxy, extragalactic astronomy, atmospheric optics and astronomical climate, instruments and devices, and mathematical processing of astronomical information. The journal welcomes manuscripts from all countries in the English or Russian language.