Results 61 to 70 of about 194,727 (195)

Magnetogravity Waves Bridge the Martian Atmosphere and Ionosphere

The Astrophysical Journal
Gravity waves (GWs) are essential to Martian atmospheric dynamics but are typically confined below ∼300 km due to viscous dissipation. Using MAVEN/NGIMS observations (2014–2022), we report persistent ion perturbations extending far beyond this ...
Jianping Huang, Si Liu, Fuliang Xiao, Jiapeng Guo, Xuanyun Zeng, Zhonglei Gao   +5 more
doaj   +1 more source

Cosmic Radiation Dose‐Rates for Civil Aviation in the Middle East: Vertical Structure, Solar Modulation, and Comparison With Models

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 17, 16 September 2026.
Abstract High‐altitude balloon measurements were conducted over southern Israel (30°35′N, 34°45′E; 850 m a.s.l., geomagnetic rigidity cutoff 10.3 GV) to characterize the vertical profiles of atmospheric ionization and radiation up to ∼35 km. Six balloon launches between October 2014 and August 2016 recorded the variability of atmospheric ionization ...
Roy Yaniv, Yoav Yair, Colin Price
wiley   +1 more source

Magnetic Reconnection inside a Martian Ion Plume: MAVEN Observations

The Astrophysical Journal
The Martian ion plume is an important escape channel that influences the long-term evolution of the planet’s atmosphere, yet the small-scale dynamics within plumes remain poorly constrained by in situ observations.
Pu Yang, Xiaojun Xu, Hengyan Man, Xing Wang, Siqi Yi, Lei Luo, Zhongyi Liu, Zilu Zhou   +7 more
doaj   +1 more source

Shining light on the aurora's contributions to people: A qualitative study of the aurora borealis in Greenland

People and Nature, Volume 8, Issue 9, Page 3122-3144, September 2026.
Abstract The aurora borealis (northern lights) is an abiotic natural phenomenon that contributes to human well‐being. There is currently a significant research gap in primary qualitative valuation of the aurora's links to people. This exploratory qualitative study applies the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES ...
James David Broome, David Cook, Brynhildur Davíðsdóttir, Benjamin David Hennig   +3 more
wiley   +1 more source

Imaging polarimetry of planetary and proto-planetary nebulae [PDF]

, 1997
Optical imaging polarimetry has been performed on a small sample of objects which are associated with that stage of stellar evolution occurring between the Asymptotic Giant Branch and full Planetary Nebula. Three such systems are considered, specifically,
Bowlzer, S.L., Bowlzer, S. L.
core  

Frequency Characteristics of Magnetosonic Waves Driven by Hot Ring-Beam Protons

The Astrophysical Journal
Magnetosonic (MS) waves can be generated by energetic ring-beam protons, appearing as harmonics near the local proton cyclotron frequency, in the planetary ionospheres/magnetospheres.
Amrutha, S. V. Singh, K. C. Barik, G. S. Lakhina   +3 more
doaj   +1 more source

Numerical Investigations of Low‐Latitude Ground Magnetic Fields Due To Cavity Mode Oscillations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Pi2 oscillations are known to be associated with cavity mode oscillations (CMOs) in the inner magnetosphere at low latitudes. CMOs can also be excited by interplanetary shocks on the dayside. We present results from a global linear MHD wave model in spherical coordinates that allows us to analyze these waves at equatorial latitudes.
K. Majmudar, R. L. Lysak, K. Takahashi
wiley   +1 more source

A Benchmark Model for the Sunlit Martian Ionosphere: Structure, Composition, and Energetics

The Astrophysical Journal
Multi-instrument measurements of the Martian upper atmosphere and ionosphere by the Mars Atmosphere and Volatile Evolution (MAVEN) mission demand a self-consistent model capable of simultaneously solving the coupled continuity, momentum, and energy ...
Yanxing Liu, Xiaoshu Wu, Jun Cui, Haoyu Lu, Yutian Cao, Jianyang Li   +5 more
doaj   +1 more source

Connections Between Stratospheric GWs, the Polar Vortex, and MSTIDs From Longitudinally Distinct Regions During Nine Arctic Winters

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Midlatitude medium‐scale traveling ionospheric disturbances (MSTIDs) are a common source of ionospheric variability that may influence GNSS‐based positioning and can disrupt HF‐communication channels. Here, we present a comprehensive nine‐winter analysis (2014–2023) that establishes a robust connection between stratospheric gravity waves (GWs)
S. Derghazarian, L. Goncharenko, V. L. Harvey, S.‐R. Zhang, A. Coster, E. Becker, G. Kwon   +6 more
wiley   +1 more source

Ionospheres of outer planets [PDF]

, 1987
Ionospheres of Jupiter, Saturn and Uranus are reviewed on the basis of existing experimental measurements and theoretical models. The radio science experiments on Pioneer 10 and 11 and Voyager 1 and 2 indicate the presence of equatorial anomaly in the ...
Mahajan, K. K.
core   +2 more sources