the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
F-region drift current distribution by X wave ionospheric heating
Yong Li
Hui Li
Jian Wu
Xingbao Lv
Chengxun Yuan
Ce Li
Zhongxiang Zhou
Abstract. We present a theoretical and numerical study of drift current model in the ionosphere by incorporating the ohmic heating model and the magnetohydrodynamic (MHD) momentum equation. Based on these equations, the ionospheric electron temperature and drift current are investigated. The results indicate that the maximum change of electron temperature ΔTe is about 570 K, and the ratio is ΔTe / Te ~48 %. The maximum drift current density is 8 × 10−10 A ⋅ m−2, and its surface integral is 5.76 A. Diamagnetic drift current is the main form of current. The low collision frequency between charged particles and neutral particles has little effect on the current, and the collision frequency of electrons and ions is independent of the drift current. The current density profile is a flow ring. We present the effective conductivity as a function of the angle between the geomagnetic field and the radio wave; the model explains why the radiation efficiency in Kotik's experiment was strongest when the X wave is heating along the magnetic dip angle.
Yong Li et al.
Status: open (until 06 Jul 2023)
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RC1: 'Comment on egusphere-2023-610', Anonymous Referee #1, 03 Jun 2023
reply
- In the abstract, the authors mentioned the following statement which is not appropriate.
the model explains why the radiation efficiency in Kotik's experiment was strongest 15 when the X wave is heating along the magnetic dip angle.
You may revise the sentence as follow:
the model explains why the radiation efficiency was strongest when the X wave is heating along the magnetic dip angle as reported in recent observations by Kotik et al…..
- There are many grammatical mistakes and very long sentences that make it difficult for the reader to follow. As an example please lines 30-34 and many more examples to be find.
- Lines 44-46 have to be revised. This is not an appropriate way to promote your work. You may mention that your work is including more physics that was neglected in the previous studies.
- Another issue that is not discussed or addressed properly here is the work done by Mahmoudian and Kalaee, 2019.
This new study which is a continuation of previous work by Eliasson and Papadapoulos 2012, has shown that the VLF signal may not penetrate to the D-region as efficient as the ELF signal. I suggest that authors provide the explanation on ELF or VLF excitation during HF modulation (Beat wave) and try to provide a more general conclusion rather than just studying the excited diamagnetic current and its aspect angle dependency.
Study of ULF-VLF wave propagation in the near-Earth environment for earthquake prediction, Advances in Space Research, Volume 63, Issue 12, 2019,
- It is critical that authors include the geomagnetic angles for other latitudes such as mid latitude (Arecibo Observatory) or equatorial region (possible facility coming at Hicamarca Peru). The efficiency of HF pump heating at those latitudes and possible variation of excited diamagnetic current should be discussed. If the proposed model is not capable of simulating such condition this weakness should be admitted in the text.
Citation: https://doi.org/10.5194/egusphere-2023-610-RC1
Yong Li et al.
Yong Li et al.
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