Results 81 to 90 of about 329,822 (248)
, 2004 Using a mean-field dynamo model with a spherically symmetric helical turbulence parameter alpha which is dynamically quenched and disturbed by additional noise, the basic features of geomagnetic polarity reversals are shown to be generic consequences of ...
A. Cox, +12 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract We demonstrate the presence of the oldest identifiable marine magnetic anomalies in the Phoenix lineations of the western Pacific based on careful assessment of new data. Recently acquired sea surface magnetic anomalies and multichannel seismic profiles confirm magnetic signals recorded within the Middle‐Jurassic to Early Cretaceous basement ...
Masako Tominaga +4 more
wiley +1 more source
Winter Anomaly 1982/83 in Comparison with Earlier Winters (1960-82) [PDF]
, 1984 The winter anomaly in the winter of 1982/83 is compared with the winter anomalies of earlier winters (1960-82) from the point of view of amplitude and timing of the winter anomaly, and geomagnetic and dynamic activity influences.
Lastovicka, J.
core +1 more source
A new deterministic model for chaotic reversals
, 2012 We present a new chaotic system of three coupled ordinary differential equations, limited to quadratic nonlinear terms. A wide variety of dynamical regimes are reported.
Gissinger, Christophe
core +1 more source
Impact of Solar Irradiance on Storm‐Time Thermospheric Mass Density Response
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract As a key parameter in the externally forced ionosphere–thermosphere (IT) system, mass density response to storms is affected by the prevailing solar irradiance. To better understand this relationship, we examine mass density responses to the same storm but with different background solar irradiance levels.
Simin Zhang +5 more
wiley +1 more source
Evolution of Open Magnetic Flux During Substorms: The Effects of Dipole Tilt Angle
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract There is a long‐standing debate on the causes of the semiannual variation of geomagnetic activity. One of the prevailing hypotheses is that the Earth's dipole tilt angle Ψ ${\Psi }$ modulates the dayside reconnection rate, causing the so‐called equinoctial effect. Here we perform the first large‐scale statistical study to test this hypothesis.
A. Nair +3 more
wiley +1 more source
Ice ages and geomagnetic reversals [PDF]
There have been speculations on the relationship between climatic cooling and polarity reversals of the earth's magnetic field during the Pleistocene.
Wu, Patrick
core +1 more source
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract Extreme conditions during storms profoundly alter the evolution of equatorial plasma bubbles (EPBs), yet the key dynamics remains poorly understood. We document the rapid expansion, contraction, and decay of super EPBs in South America during the 12 November 2025 storm with Interplanetary Magnetic Field (IMF) Bz/By magnitude exceeding ∼50 nT ...
Shasha Zou +6 more
wiley +1 more source
Earth and Planetary PhysicsThe Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) onboard the Ionospheric Connection Explorer (ICON) satellite offers the opportunity to investigate the altitude profile of thermospheric winds.
JiaWei Wu +3 more
doaj +1 more source
Wavelet analysis on paleomagnetic (and computer simulated) VGP time series
Annals of Geophysics, 2003 We present Continuous Wavelet Transform (CWT) data analysis of Virtual Geomagnetic Pole (VGP) latitude time series. The analyzed time series are sedimentary paleomagnetic and geodynamo simulated data.
A. Siniscalchi +3 more
doaj +1 more source