Probable signatures of the polarization jet in the plasmasphere

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2025-02-25 DOI:10.1016/j.jastp.2025.106482

G.A. Kotova , V.L. Khalipov , A.E. Stepanov , V.V. Bezrukikh

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引用次数: 0

Abstract

The measurements of cold plasma on the MAGION 5 spacecraft detected the regions in the plasmasphere or in its boundary layer close to the plasmapause in which proton density is increased by 2 or more times compared to the surrounding areas. As a rule, such structures with increased density are observed after substorm disturbances. Earlier ground-based and satellite measurements evidence that during substorms in the polarization jet band the ascending plasma flows from the ionosphere are formed, the vertical velocity of which reaches 1.0–2.0 km/s at the heights of DMSP satellites (∼850 km). Some examples of case studies are given where registered structures of increased density in the plasmasphere are compared with the observations of rapid plasma flows from the ionosphere during the development of polarization jet taking into account the time of the movement of plasma from the ionosphere to the plasmasphere. These examples suggest the interrelationship of the observed phenomena over long time intervals.

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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.