Results 51 to 60 of about 244,108 (291)

Jupiter's polar ionospheric flows: measured intensity and velocity variations poleward of the main auroral oval [PDF]

, 2003
Recent analysis of high-resolution spectra of Doppler-shifted H3+ emission from the auroral/polar regions of Jupiter revealed a complex wind system, with a persistent auroral electrojet and strong anti-sunward flows in a region of lesser intensity ...
Bunce, E.J., Cowley, S.W.H., Miller, S., Stallard, T.S.   +3 more
core  

On the Energy Source of Green Emissions in Ghost

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract The understanding on the formation mechanism of ghosts as a new category of transient luminous events and favorable conditions for their occurrence is limited. In this work, we examined six ground‐based observations of ghost events captured by digital SLR cameras.
Xin Huang, Zhu Meng, Gaopeng Lu, Zhengwei Cheng, Feifan Liu, Ningyu Liu, Paul M. Smith, Frankie Lucena   +7 more
wiley   +1 more source

Coupling Between Dispersive Alfvén Wave and Modified Electron Acoustic Wave in Downward Current Region: Parallel Potential Drop and Upgoing Ionospheric Electrons

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Results from a 1D kinetic simulation, for the first time, unveil the generation and time evolution of the downward parallel electric fields stemming from the coupling between modified electron acoustic waves (MEAWs) and dispersive Alfvén waves (DAWs).
Run Shi, Jun Liang, Zejun Hu, Desheng Han, Qinghe Zhang   +4 more
wiley   +1 more source

H2 Chemistry and Protonation in the Dayside Venusian Upper Atmosphere

The Astronomical Journal
Although H _2 is present in low concentrations, it critically controls the structure and composition of planetary upper atmospheres through protonation under solar extreme-ultraviolet and soft X-ray irradiation. Recent studies highlight the importance of
Shiqi Wu, Xiaoshu Wu, Yanxing Liu, Jun Cui   +3 more
doaj   +1 more source

Impact of Heavy Ions on the Structure of Current Sheets in the Gravity Field of Exoplanets and Stars

The Astrophysical Journal, 2023
Boundary current sheets (CSs) can be formed in collisionless space plasmas in the environment of exoplanets and cold stars. Usually they represent curved surfaces carrying the electric current analogous to the well-known planetary ionospheres ...
R. A. Kislov, H. V. Malova, O. V. Khabarova, L. M. Zelenyi, U. P. Antsiferova   +4 more
doaj   +1 more source

Intermittent turbulence, noisy fluctuations and wavy structures in the Venusian magnetosheath and wake [PDF]

, 2008
Recent research has shown that distinct physical regions in the Venusian induced magnetosphere are recognizable from the variations of strength of the magnetic field and its wave/fluctuation activity.
Abry, Amerstorfer, Bauer, Biernat, Brace, Bridge, Elphic, Frisch, Intriligator, Leubner, Luhmann, Luhmann, Luhmann, M. Delva, M. P. Leaner, M. Volwerk, Marubashi, Press, Pérez-de-Tejada, Pérez-de-Tejada, Romanov, Russell, Russell, Spreiter, T. L. Zhang, Terada, Volwerk, Volwerk, Vörös, Vörös, Vörös, W. Baumjohann, Wolff, Yordanova, Z. Vörös, Zhang, Zhang   +36 more
core   +1 more source

Direct Observational Evidence of the Mesoscale Gravity Wave Modulations on Low‐Latitude Sporadic E Layer

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Sporadic E (Es) layer plays essential role in ionosphere‐atmosphere coupling. Theoretical simulations show that the atmospheric gravity waves (GWs) in the lower thermosphere are the main modulatory source on Es dynamics at small spatial scales and short periods.
Junyi Wang, Xinan Yue, Xu Zhou, Yihui Cai, Feng Ding, Jorge L. Chau, David C. Fritts, Juha Vierinen, Alan Z. Liu, Baiqi Ning   +9 more
wiley   +1 more source

Sporadic E-like Topside Layer Driven by Wind Shear in the Martian Ionosphere

The Astrophysical Journal
Ionospheric plasma density disturbances significantly affect radio wave propagation, impacting communication and planetary exploration. At Earth, sporadic E layers (Es) are commonly observed. They are characterized by thin, high-density plasma structures
Rong Tian, Chunhua Jiang, Christopher Michael Fowler, Beatriz Sánchez-Cano, Glyn Collinson, David J. Andrews, Wenjie Yin, Guobin Yang, Tongxin Liu, Chongzhe Lao, Yaogai Hu   +10 more
doaj   +1 more source

The Characteristics of Pekeris Modes Revealed by Long‐Term Reanalysis Data JAWARA Covering the Entire Middle Atmosphere

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 2, 28 January 2026.
Abstract The characteristics of Pekeris modes as well as Lamb modes are investigated using the new reanalysis data set JAWARA, which spans over 19 years and covers the entire middle atmosphere. Pekeris modes are a class of global normal modes whose energy is trapped in two height regions that is, around the stratopause and the surface, while the energy
Hiroto Sekido, Kaoru Sato
wiley   +1 more source

Oscillation of the Ionosphere at Planetary‐Wave Periods

Journal of Geophysical Research: Space Physics, 2018
AbstractF‐region ionospheric oscillations at planetary‐wave (PW) periods (2–20 days) are investigated, with primary focus on those oscillations transmitted to the ionosphere by PW modulation of the vertically propagating tidal spectrum. Tidal effects are isolated by specifically designed numerical experiments performed with the National Center for ...
J. M. Forbes, A. Maute, X. Zhang, M. E. Hagan   +3 more
openaire   +4 more sources