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

被引：0

作者：

Tang, Zhenzhang ^{[1
,2
,3
]}

Le, Huijun ^{[1
,2
,3
,4
]}

Liu, Libo ^{[1
,2
,3
,4
]}

Chen, Yiding ^{[1
,2
,3
,5
]}

Zhang, Ruilong ^{[1
,2
,3
,4
]}

Li, Wenbo ^{[1
,4
]}

Liu, Wendong ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China

[2] Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China

[3] Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China

[4] Chinese Acad Sci, Inst Geol & Geophys, Heillongjiang Mohe Natl Observ Geophys, Beijing 100029, Peoples R China

[5] Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China

来源：

REMOTE SENSING | 2024年 / 16卷 / 20期

基金：

中国国家自然科学基金;

关键词：

predawn heating effect; empirical model; the magnetic field line and the sunrise line; quantitative analysis; ELECTRON-TEMPERATURE; MODEL;

D O I：

10.3390/rs16203809

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页数：11

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