将PC指标值作为估计磁亚暴功率的标准

IF 1.9 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2025-07-01 DOI:10.1016/j.jastp.2025.106591

Oleg Troshichev, Alexander Nikolaev

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引用次数: 0

摘要

介绍了极帽磁活动PC指数，用来衡量地球极帽受太阳风影响所产生的磁活动。目前，PC指数被认为是太阳风-磁层耦合过程中太阳风能量输入磁层的代表（IAGA决议，2013,2021）。这意味着PC指数可以作为估计磁层扰动过程中各种磁层和电离层特性的标准。本文论证了用不同PC指数值的地磁δH和δD分量空间分布图来监测55°~ 85°CGLat纬度地磁亚暴进程的可能性。

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The PC index value as a standard for estimation of the magnetic substorms power

The polar cap magnetic activity PC index was introduced as a measure of the magnetic activity generated in the Earth's polar caps by the solar wind influence. At present the PC index is regarded as a proxy of the solar wind energy input into the magnetosphere in course of solar wind – magnetosphere coupling (IAGA Resolutions, 2013, 2021). It implies that PC index can be used as a standard for estimation of various magnetospheric and ionospheric characteristics in course of magnetosphere disturbances. This paper demonstrates possibility to monitor the magnetic substorm progression at latitudes from 55° to 85° CGLat in form of maps of the geomagnetic δH and δD components spatial distribution for different values of PC index.

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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.