Results 131 to 140 of about 58,534 (245)
Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.Abstract Airglow layers are powerful tracers of upper‐atmosphere dynamics because of their sensitivity to a broad spectrum of atmospheric wave phenomena. Seismic activity, and in particular Rayleigh waves, constitutes a forcing mechanism capable of generating infrasonic waves in the atmosphere.
P.‐Y. Froissart +4 more
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Imprint of the Quasi‐Biennial Oscillation on the Ionosphere and Thermosphere
Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.Abstract The Quasi‐Biennial Oscillation (QBO) is a dominant mode of stratospheric variability and is known to modulate the variability of the ionosphere‐thermosphere (IT) system. However, the extent of its influence on the ionosphere‐thermosphere system remains uncertain due to weak signals and confounding with similar periodicities in solar flux.
D. Singh, L. P. Goncharenko, S. R. Zhang
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Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.Abstract A sudden drop in solar radiation during an annular (or total) eclipse directly affects ionospheric electrodynamics, primarily through the reduction of solar extreme ultraviolet (EUV) and soft X‐ray flux, which are responsible for generating the ionospheric plasma.
Charles Owolabi +6 more
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Cosmological Perturbation Theory
, 2013 Lecture notes from the Mangaratiba cosmology school, August 2012. To appear in the proceedings (S. Perez Bergliaffa and M. Novello, Eds., 2013)
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Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.Abstract Measurements of Waves instrument onboard the Juno spacecraft suggest that narrowband kilometric radiation (nKOM; 20–141 kHz) and narrowband low‐frequency radiation (nLF; 5–70 kHz) are generated within the plasma near the Io plasma torus (IPT) in low‐latitude regions.
A. Boudouma +4 more
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.Abstract The May 2024 geomagnetic superstorm provided the opportunity to explore how strong wave‐particle interactions affect energetic electron precipitation under intense driving. Using coordinated measurements from a balloon‐borne Timepix‐based X‐ray detector, ground‐based riometers and magnetometers, and Arase satellite observations, we identified ...
L. Olifer +22 more
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Statistical Study of Short Large‐Amplitude Magnetic Structures at Mars Observed by MAVEN
Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.Abstract We present a statistical study of Short Large‐Amplitude Magnetic Structures (SLAMS) in the Martian foreshock using data from the Mars Atmosphere and Volatile Evolution (MAVEN) mission between 01 January 2015 and 31 December 2019. We have identified 21,008 SLAMS during this time interval and statistical results are presented on the SLAMS ...
Tsz Kiu Wong Chan +2 more
wiley +1 more source
Zero average values of cosmological perturbations as an indispensable condition for the theory and simulations. [PDF]
Eur Phys J C Part Fields, 2015 Eingorn M, Brilenkov M, Vlahovic B.
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Cosmological perturbation theory
, 2004 This is a review on cosmological perturbation theory. After an introduction, it presents the problem of gauge transformation. Gauge invariant variables are introduced and the Einstein and conservation equations are written in terms of these variables. Some examples, especially perfect fluids and scalar fields are presented in detail.
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