2. Aeronomy
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Authors: Y. Moriyama, T. T. Tsuda, Y. Ando, H. Suzuki, H. Nakagawa, T. Nishiyama, Y.-M. Tanaka, K. T. Murata and J. YueCitation: Earth, Planets and Space 2025 77:162Content type: Express Letter Published on: 23 October 2025
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Signature of white bubbles in the equatorial ionosphere
From airglow OI 630 nm observations in the low-latitude ionosphere, we identified an enhancement in the emission rate inside Equatorial Plasma Bubbles (EPBs) on certain occasions after local midnight during eq...
Authors: H. Takahashi, C. A. O. B. Figueiredo, C. M. Wrasse, D. Barros, C. S. Carmo, A. Carrasco, R. A. Buriti, I. Paulino, F. Egito, L. F. R. Vital, G. M. Rosa and A. H. R. SampaioCitation: Earth, Planets and Space 2025 77:148Content type: Full paper Published on: 30 September 2025 -
Suppression of ion heating in the cusp during plasma flow burst
Previous studies have shown the occurrence of short-duration plasma flow bursts, typically lasting a few minutes, within the cusp region, often accompanied by the poleward motion of the 630-nm aurora. In this ...
Authors: Satoshi Taguchi, Tomokazu Oigawa, Yunosuke Nagafusa, Hiroyuki Shinagawa, Keisuke Hosokawa, Yasunobu Ogawa and Haruto KoikeCitation: Earth, Planets and Space 2025 77:136Content type: Full paper Published on: 18 August 2025 -
Ionospheric disturbances associated with the eruption of Mt. Asama observed by TEC data and HF Doppler sounding
Mt. Asama, Nagano Prefecture, Japan, erupted at 11:02 UT on September 1st, 2004. Ionospheric disturbances associated with this eruption were detected using TEC data and HF Doppler observations. It has already ...
Authors: Hiroyuki Nakata, Aritsugu Chonan, Keisuke Hosokawa, Takuya Tsugawa, Michi Nishioka and Hiroyo OhyaCitation: Earth, Planets and Space 2025 77:81Content type: Full paper Published on: 30 May 2025 -
Unveiling the vertical ionospheric responses following the 2024 Noto Peninsula Earthquake with an ultra-dense GNSS network
This paper leverages total electron content (TEC) perturbations obtained from an ultra-dense Global Navigation Satellite System (GNSS) receiver network across the Japanese archipelago to reconstruct the three-...
Authors: Weizheng Fu, Yuichi Otsuka, Nicholas Ssessanga, Atsuki Shinbori, Takuya Sori, Michi Nishioka and Septi PerwitasariCitation: Earth, Planets and Space 2025 77:77Content type: Express Letter Published on: 29 May 2025 -
Characteristics of the ambipolar electric field during ion upflow events
A significant amount of magnetospheric plasma originates from the ionosphere and has been transported to the magnetosphere through the ion outflow process. Cold ions in the magnetosphere predominantly originat...
Authors: Lindis Merete Bjoland, Yasunobu Ogawa and Stein HaalandCitation: Earth, Planets and Space 2025 77:78Content type: Full paper Published on: 27 May 2025 -
Investigation into the earliest generation of medium-scale traveling ionospheric disturbances with electrodynamic signatures using dense GNSS observations over Japan
Understanding the earliest formation stages of medium-scale traveling ionospheric disturbances (MSTIDs) with electrodynamic signatures (commonly referred to as nighttime MSTIDs) is essential for comprehending ...
Authors: Weizheng Fu, Yuichi Otsuka, Tatsuhiro Yokoyama, Zezhong Li, Mamoru Yamamoto, Michi Nishioka, Hidekatsu Jin, Keisuke Hosokawa and Claudia StolleCitation: Earth, Planets and Space 2025 77:71Content type: Full paper Published on: 20 May 2025 -
Visualizing the structure and motion of sporadic E layer using marine traffic radio signals
The sporadic E layer (EsL), characterized by enhanced ionospheric electron density at around 100 km altitude, has been recognized as one of the prominent phenomena in the E region ionosphere and is known to in...
Authors: Keisuke Hosokawa, Nanako Mayumi, Atsushi Yamamoto, Susumu Saito, Satoshi Andoh, Hiroyuki Shinagawa, Toru Takahashi, Jun Sakai, Takuo Tsuda, Ichiro Tomizawa, Hiroyuki Nakata, Akinori Saito, Manabu Shinohara, Michi Nishioka, Takuya Tsugawa and Mamoru IshiiCitation: Earth, Planets and Space 2025 77:62Content type: Full paper Published on: 7 May 2025 -
Equatorial spread-F characteristics using HF Doppler shift measurements: results from upgraded Doppler sounder system in Tucuman, Argentina
Horizontals drifts of equatorial Spread F (ESF) at post-sunset and post-midnight are investigated by analyzing six ESF events observed during the period of November 2022–March 2023. Horizontal drift velocities...
Authors: Habtamu Marew, Jaroslav Chum, Maria Graciela Molina, Uma Ashrani and Carlos MartinisCitation: Earth, Planets and Space 2025 77:31Content type: Full paper Published on: 11 March 2025 -
Comparison of polar mesospheric cloud observations by Himawari-8/AHI and Himawari-9/AHI
We have applied the polar mesospheric cloud (PMC) detection method to the full-disc images obtained by the Advanced Himawari Imager (AHI) on board the Japanese geostationary Earth orbit (GEO) meteorological sa...
Authors: Y. Moriyama, T. T. Tsuda and Y. AndoCitation: Earth, Planets and Space 2025 77:30Content type: Technical report Published on: 11 March 2025 -
Calibration of h'Es from VIPIR2 ionosondes in Japan
The measurement of virtual height of the sporadic E layer (h'Es) is very sensitive to the type of ionosonde used and the calibration processes. The ionosondes used by the national institute of communication an...
Authors: Sorai Teraoka, Huixin Liu, Michi Nishioka, Susumu Saito, Toru Takahashi, Atsushi Kumamoto, Yuki Ashihara and Takumi AbeCitation: Earth, Planets and Space 2025 77:21Content type: Technical report Published on: 25 February 2025 -
Chemical heat derived from rocket-borne WADIS-2 experiment
Chemical heating rates were derived from three of the most significant reactions based on the analysis of common volume rocket-borne measurements of temperature, atomic oxygen densities, and neutral air densit...
Authors: Mykhaylo Grygalashvyly, Boris Strelnikov, Irina Strelnikova, Markus Rapp, Franz-Josef Lübken, Corinna Schütt, Claudia Stephan, Martin Eberhart, Stefan Löhle and Stefanos FasoulasCitation: Earth, Planets and Space 2024 76:180Content type: Full paper Published on: 30 December 2024 -
Spatial structures of blue low-latitude aurora observed from Japan during the extreme geomagnetic storm of May 2024
On May 11, 2024, an extreme G5-class geomagnetic storm triggered a spectacular and unusual display of colorful auroras in mid- to low-latitude regions all over the world. In Japan, auroras were seen not only f...
Authors: Sota Nanjo and Kazuo ShiokawaCitation: Earth, Planets and Space 2024 76:156Content type: Express Letter Published on: 5 December 2024 -
Fine structure of a daytime mid-latitude sporadic-E revealed by GNSS TEC, InSAR, and MAI
Combining the total electron content (TEC) data from two nationwide Global Navigation Satellite System (GNSS) networks in Japan with the L-band synthetic aperture radar (SAR) data, we reveal the fine spatial and ...
Authors: Tatsuya Fujimoto, Masato Furuya and Kosuke HekiCitation: Earth, Planets and Space 2024 76:138Content type: Express Letter Published on: 30 October 2024 -
Analysis of a secondary 16-day planetary wave generation through nonlinear interactions in the atmosphere
Using a nonlinear model of the general circulation of the middle and upper atmosphere (MUAM), spatio-temporal structures of planetary waves (PWs) during boreal winter were studied. Modeling of global atmospher...
Authors: Kseniia A. Didenko, Andrey V. Koval, Tatiana S. Ermakova, Arsenii V. Sokolov and Olga N. ToptunovaCitation: Earth, Planets and Space 2024 76:124Content type: Full paper Published on: 29 September 2024 -
Investigation of the long-term variation of gravity waves over South America using empirical orthogonal function analysis
The spatial and temporal variability of gravity waves (GWs) potential energy (Ep) over South America (SA) was examined by analyzing temperature profiles obtained through the utilization of Sounding of the Atmo...
Authors: Toyese Tunde Ayorinde, Cristiano Max Wrasse, Hisao Takahashi, Diego Barros, Cosme Alexandre Oliveira Barros Figueiredo, Ligia Alves da silva and Anderson Vestena BilibioCitation: Earth, Planets and Space 2024 76:105Content type: Full paper Published on: 31 July 2024 -
High-resolution 3-D imaging of electron density perturbations using ultra-dense GNSS observation networks in Japan: an example of medium-scale traveling ionospheric disturbances
For the first time using computerized ionospheric tomography (CIT) and leveraging ultra-dense slant total electron content (STEC) measurements derived from two ground-based Global Navigation Satellite System (...
Authors: Weizheng Fu, Yuichi Otsuka and Nicholas SsessangaCitation: Earth, Planets and Space 2024 76:102Content type: Full paper Published on: 31 July 2024 -
Using radio occultation-based electron density profiles for studying sporadic E layer spatial and temporal characteristics
An improved method for identifying sporadic E (Es) layer properties from radio occultation (RO) electron density profiles (EDPs) is presented. The data used are sourced from COSMIC-1 RO EDPs collected between ...
Authors: Haifeng Liu, Xiaohua Xu, Jia Luo and Tianyang HuCitation: Earth, Planets and Space 2024 76:93Content type: Full paper Published on: 10 July 2024 -
The impact of the Hunga Tonga–Hunga Ha’apai volcanic eruption on the Peruvian atmosphere: from the sea surface to the ionosphere
The eruption of the Hunga Tonga Hunga Ha’apai volcano on 15 January 2022 significantly impacted the lower and upper atmosphere globally. Using multi-instrument observations, we described disturbances from the ...
Authors: E. E. Pacheco, J. P. Velasquez, R. Flores, L. Condori, G. Fajardo, K. Kuyeng, D. E. Scipion, M. Milla, J. F. Conte, F. L. Poblet, J. L. Chau, J. Suclupe, R. Rojas and E. ManayCitation: Earth, Planets and Space 2024 76:79Content type: Full paper Published on: 28 May 2024 -
Geographical and seasonal variations of gravity wave activities in the upper mesosphere measured by space-borne imaging of molecular oxygen nightglow
Geographical and seasonal variations of gravity wave events in the upper mesosphere were investigated using the nightglow imaging data obtained by the Visible and near-Infrared Spectral Imager (VISI) on the Io...
Authors: Yuta Hozumi, Akinori Saito, Takeshi Sakanoi, Jia Yue, Atsushi Yamazaki and Hanli LiuCitation: Earth, Planets and Space 2024 76:66Content type: Full paper Published on: 7 May 2024 -
Discrete aurora and the nightside ionosphere of Mars: an EMM–MEX conjunction of FUV imaging, ionospheric radar sounding, and suprathermal electron measurements
Since 2021, a new surge in discrete aurora detections at Mars has been observed by the Emirates Mars Ultraviolet Spectrometer (EMUS) onboard the Emirates Mars Mission (EMM) Hope Orbiter as EMUS started to regu...
Authors: Yuki Harada, Yuka Fujiwara, Robert J. Lillis, Justin Deighan, Hiromu Nakagawa, Beatriz Sánchez-Cano, Mark Lester, Yoshifumi Futaana, Mats Holmström and Rudy A. FrahmCitation: Earth, Planets and Space 2024 76:64Content type: Express Letter Published on: 6 May 2024 -
Physical mechanism for the temporary intensification of wintertime sporadic E layers in 2009
This study provides a physical mechanism for the temporary intensification of wintertime sporadic E layers (EsLs) in 2009. It is widely accepted that vertical wind shears control EsL formations. EsL intensity ...
Authors: Satoshi Andoh, Akinori Saito and Hiroyuki ShinagawaCitation: Earth, Planets and Space 2024 76:60Content type: Full paper Published on: 23 April 2024 -
Post-midnight purple arc and patches appeared on the high latitude part of the auroral oval: Dawnside counterpart of STEVE?
The phenomenon known as strong thermal emission velocity enhancement (STEVE) is a purple/mauve arc-shaped atmospheric glow observed at lower latitudes of the auroral oval on the duskside. Simultaneous observat...
Authors: Sota Nanjo, Gabriel Arne Hofstra, Kazuo Shiokawa, Atsuki Shinbori, Satonori Nozawa and Keisuke HosokawaCitation: Earth, Planets and Space 2024 76:55Content type: Full paper Published on: 9 April 2024 -
The first simultaneous spectroscopic and monochromatic imaging observations of short-wavelength infrared aurora of \(\mathrm {N_{2}^{+}}\) Meinel (0,0) band at 1.1 \(\mathrm {\mu }\)m with incoherent scatter radar
Authors: Takanori Nishiyama, Masato Kagitani, Senri Furutachi, Yuki Iwasa, Yasunobu Ogawa, Takuo T. Tsuda, Peter Dalin, Fuminori Tsuchiya, Satonori Nozawa and Fred SigernesCitation: Earth, Planets and Space 2024 76:30Content type: Express Letter Published on: 15 February 2024 -
Simulation study of atmosphere–ionosphere variations driven by the eruption of Hunga Tonga-Hunga Ha’apai on 15 January 2022
The volcano of Hunga Tonga-Hunga Ha’apai in Tonga erupted on 15 January 2022, generating severe disturbances in the atmosphere and the ionosphere. This event provided us with large amount of data of the atmospher...
Authors: Hiroyuki Shinagawa and Yasunobu MiyoshiCitation: Earth, Planets and Space 2024 76:15Content type: Frontier Letter Published on: 22 January 2024 -
Ionospheric response to the 2020 Samos earthquake and tsunami
On 30 October 2020 at 11:51 UT, a magnitude 7.0 earthquake occurred in the Dodecanese sea (37.84°N, 26.81°E, 10 km depth) and generated a tsunami with an observed run-up of more than 1 m on the Turkish coasts....
Authors: Lucilla Alfonsi, Claudio Cesaroni, Manuel Hernandez-Pajares, Elvira Astafyeva, Simon Bufféral, Panagiotis Elias, Anna Belehaki, Tsagouri Ioanna, Heng Yang and Marco GuerraCitation: Earth, Planets and Space 2024 76:13Content type: Full paper Published on: 19 January 2024 -
Performance of the double-thin-shell approach for studying nighttime medium-scale traveling ionospheric disturbances using two dense GNSS observation networks in Japan
Electrodynamic coupling between the ionospheric E and F regions is widely recognized as the underlying mechanism for generating medium-scale traveling ionospheric disturbances (MSTIDs) during nighttime at midl...
Authors: Weizheng Fu, Yuichi Otsuka, Atsuki Shinbori, Michi Nishioka and Septi PerwitasariCitation: Earth, Planets and Space 2024 76:7Content type: Full paper Published on: 8 January 2024 -
\(\textrm{O}^+\) density distribution in the nightside ionosphere reconstructed from ISS-IMAP/EUVI data
Authors: Shin’ya Nakano, Yuta Hozumi, Akinori Saito, Ichiro Yoshikawa, Atsushi Yamazaki, Kazuo Yoshioka and Go MurakamiCitation: Earth, Planets and Space 2024 76:3Content type: Full paper Published on: 2 January 2024 -
Climatology of mesosphere and lower thermosphere diurnal tides over Jicamarca (12\(^\circ\)S, 77\(^\circ\)W): observations and simulations
This work shows a 3-year climatology of the horizontal components of the solar diurnal tide, obtained from wind measurements made by a multistatic specular meteor radar (SIMONe) located in Jicamarca, Peru (12
Authors: Jose Suclupe, Jorge L. Chau, J. Federico Conte, Marco Milla, N. M. Pedatella and K. KuyengCitation: Earth, Planets and Space 2023 75:186Content type: Express Letter Published on: 14 December 2023 -
Assessing the potential of ionosonde for forecasting post-sunset equatorial spread F: an observational experiment in Southeast Asia
The occurrence of equatorial spread F (ESF) has the potential to detrimentally impact space-based technological systems. This study investigates the utility of ionosondes in forecasting the incidence of post-s...
Authors: Prayitno Abadi, Umar Ali Ahmad, Yuichi Otsuka, Punyawi Jamjareegulgarn, Alif Almahi, Septi Perwitasari, Slamet Supriadi, Wendi Harjupa and Reza Rendian SeptiawanCitation: Earth, Planets and Space 2023 75:185Content type: Full paper Published on: 13 December 2023 -
Giant ionospheric density hole near the 2022 Hunga-Tonga volcanic eruption: multi-point satellite observations
A giant ionospheric hole was simultaneously detected in the in situ measurements of FORMOSAT-7/COSMIC-2 (F7/C2), Ionospheric Connection Explorer (ICON), Swarm missions, and ground-based total electron content ...
Authors: Jong-Min Choi, Charles Chien-Hung Lin, P. K. Rajesh, Jia-Ting Lin, Marty Chou, Young-Sil Kwak and Shih-Ping ChenCitation: Earth, Planets and Space 2023 75:184Content type: Full paper Published on: 8 December 2023 -
New aspects of the upper atmospheric disturbances caused by the explosive eruption of the 2022 Hunga Tonga–Hunga Ha’apai volcano
The Hunga Tonga–Hunga Ha’apai (HTHH) undersea volcanic eruption that occurred at 04:15 UT on 15 January 2022 is one of the most explosive events in the modern era, and a vertical plume reached approximately 55...
Authors: Atsuki Shinbori, Yuichi Otsuka, Takuya Sori, Michi Nishioka, Perwitasari Septi, Takuo Tsuda, Nozomu Nishitani, Atsushi Kumamoto, Fuminori Tsuchiya, Shoya Matsuda, Yoshiya Kasahara, Ayako Matsuoka, Satoko Nakamura, Yoshizumi Miyoshi and Iku ShinoharaCitation: Earth, Planets and Space 2023 75:175Content type: Frontier Letter Published on: 22 November 2023 -
The relation between the surface composition anomaly and distribution of the exosphere of Mercury
In celestial bodies with tenuous collisionless atmospheres, such as Mercury, the spatial distribution of the exosphere is expected to reflect the surface composition. In this study, we discuss whether the dist...
Authors: Yudai Suzuki, Kazuo Yoshioka, Go Murakami and Ichiro YoshikawaCitation: Earth, Planets and Space 2023 75:174Content type: Full paper Published on: 20 November 2023 -
Periodic oscillations of Doppler frequency excited by the traveling ionospheric disturbances associated with the Tonga eruption in 2022
The explosive eruption of the Hunga Tonga-Hunga Ha’apai volcano on 15 January 2022 generated atmospheric waves traveling around the Earth, which caused ionospheric disturbances on various spatio-temporal scale...
Authors: Hiroyuki Nakata, Keisuke Hosokawa, Susumu Saito, Yuichi Otsuka and Ichoro TomizawaCitation: Earth, Planets and Space 2023 75:158Content type: Full paper Published on: 10 October 2023 -
Simultaneous observations of equatorial plasma bubbles with an all-sky airglow imager and a HF Doppler sounding system in Taiwan
High-Frequency Doppler (HFD) sounders at low-latitudes often detect characteristic oblique spreading Doppler traces in the spectrogram, known as Oblique Spread Structure (OSS). OSS has been expected to be gene...
Authors: Hiromi Sejima, Keisuke Hosokawa, Hiroyuki Nakata, Jaroslav Chum, Chien-Hung Lin and Jia-Ting LinCitation: Earth, Planets and Space 2023 75:156Content type: Full paper Published on: 10 October 2023 -
Monitoring of equatorial plasma bubbles using aeronautical navigation system: a feasibility study
It has long been known that field-aligned irregularities within equatorial plasma bubbles (EPBs) can cause long-range propagation of radio waves in the VHF frequencies such as those used for TV broadcasting th...
Authors: Keisuke Hosokawa, Susumu Saito, Hiroyuki Nakata, Chien-Hung Lin, Jia-Ting Lin, Pornchai Supnithi, Ichiro Tomizawa, Jun Sakai, Toru Takahashi, Takuya Tsugawa, Michi Nishioka and Mamoru IshiiCitation: Earth, Planets and Space 2023 75:152Content type: Frontier Letter Published on: 3 October 2023 -
Secondary instability generated on the equatorial plasma bubbles wall due to an interaction with midnight brightness wave
Interaction between Equatorial Plasma Bubbles (EPBs) and midnight Brightness wave (MBW) was observed over Bom Jesus da Lapa (13.3° S, 43.5° W; Quasi-Dipole geomagnetic latitude of 14.1° S), using OI 630 nm all...
Authors: Cosme Alexandre Oliveira Barros Figueiredo, Rodrigo A. Miranda, Cristiano Max Wrasse, Hisao Takahashi, Diego Barros, Fábio Egito, Geângelo de Matos Rosa and Antonio Hélder Rodrigues SampaioCitation: Earth, Planets and Space 2023 75:141Content type: Full paper Published on: 15 September 2023 -
Machine learning emulator for physics-based prediction of ionospheric potential response to solar wind variations
Physics-based simulations are important for elucidating the fundamental mechanisms behind the time-varying complex ionospheric conditions, such as ionospheric potential, against unprecedented solar wind variat...
Authors: Ryuho Kataoka, Shinya Nakano and Shigeru FujitaCitation: Earth, Planets and Space 2023 75:139Content type: Express Letter Published on: 14 September 2023 -
Stratospheric gravity wave potential energy and tropospheric parameters relationships over South America: a study using COSMIC-2 and METOP radio occultation measurements
Using COSMIC-2 and METOP radio occultation measurements during the years 2020 and 2021, the study presents the first direct and independent relationship between the potential energy (Ep) in the stratosphere, prec...
Authors: Toyese Tunde Ayorinde, Cristiano Max Wrasse, Hisao Takahashi, Diego Barros, Cosme Alexandre Oliveira Barros Figueiredo, Solomon Otoo Lomotey, Patrick Essien and Anderson Vestena BilibioCitation: Earth, Planets and Space 2023 75:136Content type: Full paper Published on: 11 September 2023 -
On new two-dimensional UHF radar observations of equatorial spread F at the Jicamarca Radio Observatory
We describe a mode for two-dimensional UHF (445 MHz) radar observations of F-region irregularities using the 14-panel version of the advanced modular incoherent scatter radar (AMISR-14). We also present and discu...
Authors: F. S. Rodrigues, M. A. Milla, D. Scipion, J. M. Apaza, K. M. Kuyeng, J. Sousasantos, A. A. Massoud and C. PadinCitation: Earth, Planets and Space 2023 75:120Content type: Full paper Published on: 9 August 2023 -
Effect of the mirror force on the collision rate due to energetic electron precipitation: Monte Carlo simulations
We study the effect of the mirror force on the collision rate due to the energetic electron precipitation into the ionosphere. We solve the motion of individual precipitating electrons with the mirror force, w...
Authors: Yuto Katoh, Paul Simon Rosendahl, Yasunobu Ogawa, Yasutaka Hiraki and Hiroyasu TadokoroCitation: Earth, Planets and Space 2023 75:117Content type: Express Letter Published on: 2 August 2023 -
How variable are Birkeland currents?
I address the problem of estimating the time-rate-of-change of high-latitude Birkeland currents by using a string-of-pearls formation of satellites. Space series are calculated by linear interpolation of measu...
Authors: Johnathan K. BurchillCitation: Earth, Planets and Space 2023 75:116Content type: Express Letter Published on: 21 July 2023 -
Ionospheric disturbances over South America related to Tonga volcanic eruption
On January 15, 2022, we observed various unusual atmospheric wave events over South America: Atmospheric pressure waves (Lamb mode) around 12:30 to 17:30 UT, tsunamis along the Chilean coast at around 17:00 to...
Authors: H. Takahashi, C. A. O. B. Figueiredo, D. Barros, C. M. Wrasse, G. A. Giongo, R. H. Honda, L. F. R. Vital, L. C. A. Resende, P. K. Nyassor, T. T. Ayorinde, C. S. Carmo, M. B. Padua and Y. OtsukaCitation: Earth, Planets and Space 2023 75:92Content type: Full paper Published on: 25 May 2023 -
Simulation of horizontal sporadic E layer movement driven by atmospheric tides
The present study aims to reveal horizontal sporadic E (Es) movements driven by atmospheric diurnal/semi-diurnal tides using a three-dimensional (3D) ionospheric model. Horizontal Es movements have been invest...
Authors: Satoshi Andoh, Akinori Saito and Hiroyuki ShinagawaCitation: Earth, Planets and Space 2023 75:86Content type: Full paper Published on: 16 May 2023 -
Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway
Ion drag associated with the ionospheric plasma convection plays an important role in the high-latitude thermospheric dynamics, yet changes in the thermospheric wind with geomagnetic activity are not fully und...
Authors: Shin-ichiro Oyama, Anita Aikio, Takeshi Sakanoi, Keisuke Hosokawa, Heikki Vanhamäki, Lei Cai, Ilkka Virtanen, Marcus Pedersen, Kazuo Shiokawa, Atsuki Shinbori, Nozomu Nishitani and Yasunobu OgawaCitation: Earth, Planets and Space 2023 75:70Content type: Full paper Published on: 5 May 2023 -
Upward propagation of gravity waves and ionospheric perturbations triggered by the 2022 Hunga-Tonga volcanic eruption
Using an atmosphere–ionosphere coupled model (GAIA), atmospheric and ionospheric perturbations triggered by the 2022 Hunga-Tonga volcanic eruption are studied. Our result shows that ionospheric perturbations a...
Authors: Yasunobu Miyoshi and Hiroyuki ShinagawaCitation: Earth, Planets and Space 2023 75:68Content type: Express Letter Published on: 5 May 2023 -
Planetary-scale MLT waves diagnosed through multi-station methods: a review
Most experimental investigations on planetary-scale waves in the mesosphere and lower thermosphere (MLT) region are based on single-station or -satellite spectral analysis methods, which suffer from intrinsic ...
Authors: Maosheng HeCitation: Earth, Planets and Space 2023 75:63Content type: Full paper Published on: 28 April 2023 -
Light ion dynamics in the topside ionosphere and plasmasphere during geomagnetic storms
Storm-time topside ionosphere plasma composition, especially the light ion fraction, is an important parameter which controls magnetosphere–ionosphere coupling, plays a part in the growth of local instabilitie...
Authors: I. P. Pakhotin, J. K. Burchill, M. Förster and L. LomidzeCitation: Earth, Planets and Space 2023 75:62Content type: Full paper Published on: 24 April 2023 -
Longitudinal structures of zonal wind in the thermosphere by the ICON/MIGHTI and the main wave sources
In this study, the neutral wind observations from the Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) instrument onboard Ionospheric CONnections (ICON) are used to investigat...
Authors: Dan Li, Hong Gao, Jiyao Xu, Yajun Zhu, Qiuyu Xu, Yangkun Liu and Hongshan LiuCitation: Earth, Planets and Space 2023 75:59Content type: Full paper Published on: 23 April 2023 -
Analysis of ionospheric storm-time effects over the East African sector during the 17 March 2013 and 2015 geomagnetic storms
An analysis of the mechanisms that caused the storm-time effects during two geomagnetic storms that occurred on 17 March 2013 and 2015 is presented. We used Global Navigation Satellite System (GNSS) derived To...
Authors: Valence Habyarimana, John Bosco Habarulema and Teshome DugassaCitation: Earth, Planets and Space 2023 75:58Content type: Full paper Published on: 20 April 2023
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