A Study on the Predawn Ionospheric Heating Effect and Its Main Controlling Factors

We proposed, for the first time, that the angle between the horizontal projection of the magnetic field line and the sunrise line (AMFS) is a crucial factor that controls predawn heating. Through quantitative analysis, we determined that both the AMFS and the length of the magnetic field line (LMF) significantly affect predawn heating. We found that an increased AMFS intensifies predawn heating, while an increased LMF counteracts it. Our research indicates that the optimal conditions for peak predawn heating occur at an AMFS of approximately 30 degrees and an LMF of about 4000 km, where the effect surpasses 400 K. Additionally, we observed that the effects of both the AMFS and the LMF on predawn heating exhibit a saturation effect. This study provides a clearer understanding of the factors driving predawn ionospheric heating, with implications for topside ionosphere research.

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Publication Details

Journal
Remote Sensing
Published
2024-10-13
DOI
https://doi.org/10.3390/rs16203809
Citations
2
Primary Topic
Ionosphere and magnetosphere dynamics
Type
article
Field-Weighted Citation Impact
0.66

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article

A Study on the Predawn Ionospheric Heating Effect and Its Main Controlling Factors

Yiding Chen, Libo Liu, Ruilong Zhang, Wendong Liu et al.
2 citations
Remote Sensing
Ionosphere and magnetosphere dynamics
0.66
article

A Study on the Predawn Ionospheric Heating Effect and Its Main Controlling Factors

Yiding Chen, Libo Liu, Ruilong Zhang, Wendong Liu, Huijun Le, Wenbo Li, Zhenzhang Tang
article en
2 citations

Abstract

We proposed, for the first time, that the angle between the horizontal projection of the magnetic field line and the sunrise line (AMFS) is a crucial factor that controls predawn heating. Through quantitative analysis, we determined that both the AMFS and the length of the magnetic field line (LMF) significantly affect predawn heating. We found that an increased AMFS intensifies predawn heating, while an increased LMF counteracts it. Our research indicates that the optimal conditions for peak predawn heating occur at an AMFS of approximately 30 degrees and an LMF of about 4000 km, where the effect surpasses 400 K. Additionally, we observed that the effects of both the AMFS and the LMF on predawn heating exhibit a saturation effect. This study provides a clearer understanding of the factors driving predawn ionospheric heating, with implications for topside ionosphere research.

Remote SensingVol. 16(20)
Chinese Academy of Sciences (CN), Institute of Geology and Geophysics (CN), University of Chinese Academy of Sciences (CN)
National Aeronautics and Space Administration, National Natural Science Foundation of China, Chinese Academy of Sciences, Youth Innovation Promotion Association of the Chinese Academy of Sciences, National Central University, Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum GFZ, Youth Innovation Promotion Association
Openalex Percentile: Top 28%
Ionosphere and magnetosphere dynamics
0.66
DOIOpen Access PDFOpenAlex
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A Study on the Predawn Ionospheric Heating Effect and Its Main Controlling Factors — Yiding Chen, Libo Liu, et al. · Remote Sensing (2024) | TGRS Research Map | TGRS