Results 61 to 70 of about 323 (143)

Comparison of Interannual Oscillations in the F, E, and D‐Region Ionosphere Using Longterm Ground‐Based Measurements

Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.
Abstract This comprehensive study focuses on interannual oscillations from 1 to 25 years in the F, E, and D region ionosphere. By leveraging longterm (1960–2018) continuous ground‐based ionosonde and phase height measurements in northern Germany, we have identified the peak periods and temporal variations of these oscillations using advanced analysis ...
Mani Sivakandan, Dieter H. W. Peters, Jens Mielich, Toralf Renkwitz, Ralph Latteck, Jorge L. Chau   +5 more
wiley   +1 more source

Estimating Electron Temperature and Density Using Van Allen Probe Data: Typical Behavior of Energetic Electrons in the Inner Magnetosphere

Journal of Geophysical Research: Space Physics, Volume 130, Issue 4, April 2025.
Abstract The Earth's inner magnetosphere contains multiple electron populations influenced by different factors. The cold electrons of the plasmasphere, warm plasma that contributes to the ring current, and the relativistic plasma of the radiation belts often seem to behave independently.
D. Rasinskaite, C. E. J. Watt, C. Forsyth, A. W. Smith, C. J. Lao, S. Chakraborty, J. C. Holmes, G. L. Delzanno   +7 more
wiley   +1 more source

Separating DP1 and DP2 Current Pattern Contributions to Substorm‐Like Intensifications in SML

Journal of Geophysical Research: Space Physics, Volume 130, Issue 4, April 2025.
Abstract Substorms have been identified from negative bays in the AL/SML index, which traces the minimum northward ground magnetic deflection at auroral latitudes, produced by enhancements of the westward electrojet. For substorms, negative bays are caused by the closure of the Substorm Current Wedge through the ionosphere, typically localized to the ...
C. J. Lao, C. Forsyth, M. P. Freeman, J. W. Gjerloev   +3 more
wiley   +1 more source

Heterogeneous Driver‐Aware Vehicle Trajectory Reconstruction and Fusion for Multiple Long‐Range Traffic Detectors

IET Intelligent Transport Systems, Volume 19, Issue 1, January/December 2025.
A trajectory reconstruction method based on long‐range traffic detectors is proposed, which combines Newell car‐following models, the whale optimisation algorithm and particle filters to achieve trajectory reconstruction and fusion. The experimental results show that the method can effectively improve the reconstruction accuracy.
Li Li, Yu‐Tao Liu, Er‐Long Tan, Li‐Yong Zheng, Run‐Min Wang   +4 more
wiley   +1 more source

Research on geomagnetic secular variation of China and surrounding areas based on the Geomagnetic Virtual Observatories

Earth and Planetary Physics
The Low Earth Orbit (LEO) geomagnetic satellites provide a large number of high-precision measurements, which are crucial for researching the Secular Variation (SV) of the geomagnetic field.
Jiang Li, Bin Chen
doaj   +1 more source

The environment to the rescue: can physics help predict predator–prey interactions?

Biological Reviews, Volume 99, Issue 6, Page 1927-1947, December 2024.
ABSTRACT Understanding the factors that determine the occurrence and strength of ecological interactions under specific abiotic and biotic conditions is fundamental since many aspects of ecological community stability and ecosystem functioning depend on patterns of interactions among species.
Mehdi Cherif, Ulrich Brose, Myriam R. Hirt, Remo Ryser, Violette Silve, Georg Albert, Russell Arnott, Emilio Berti, Alyssa Cirtwill, Alexander Dyer, Benoit Gauzens, Anhubav Gupta, Hsi‐Cheng Ho, Sébastien M. J. Portalier, Danielle Wain, Kate Wootton   +15 more
wiley   +1 more source

Space Weather Forecasts of Ground Level Space Weather in the UK: Evaluating Performance and Limitations

Space Weather, Volume 22, Issue 11, November 2024.
Abstract Geomagnetically Induced Currents (GICs) are a severe space weather hazard, driven through coupling between the solar wind and magnetosphere. GICs are rarely measured directly, instead the ground magnetic field variability is often used as a proxy.
A. W. Smith, I. J. Rae, C. Forsyth, J. C. Coxon, M.‐T. Walach, C. J. Lao, D. S. Bloomfield, S. A. Reddy, M. K. Coughlan, A. Keesee, S. Bentley   +10 more
wiley   +1 more source

Wavelet analysis of geomagnetic jerks

, 2013
Geomagnetic jerks, or secular variation impulses, are abrupt changes in the slope of the first time derivative of the Earth's magnetic field. These changes occur on time scales of the order of a year. It has been demonstrated that the jerks might be more
de Wit, Tjaart Cornelis
core  

Obtaining High‐Resolution Magnetic Records From Speleothems Using Magnetic Microscopy

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 10, October 2024.
Abstract Speleothems are mineral deposits capable of recording detrital and/or chemical remanent magnetization at annual timescales. They can offer high‐resolution paleomagnetic records of short‐term variations in Earth's magnetic field, crucial for understanding the evolution of the dynamo.
Cauê S. Borlina, Eduardo A. Lima, Joshua M. Feinberg, Plinio Jaqueto, Ioan Lascu, Ricardo I. F. Trindade, Eric Font, Elisa M. Sánchez‐Moreno, Luca Antonio Dimuccio, Yusuke Yokoyama, Josep M. Parés, Benjamin P. Weiss, Jeffrey A. Dorale   +12 more
wiley   +1 more source

Impulses of the geomagnetic secular variation (jerks) at vassouras magnetic observatory detected by wavelet analysis

, 2010
Geomagnetic jerks are abrupt changes in the secular variation generated in the Earth's core. Even the most basic characteristics of jerks as its origin and duration, are still a matter of debate in the scientific community.
Jandyr M. Travassos, Pinheiro,Katia J., Travassos,Jandyr M., Katia J. Pinheiro   +3 more
core   +1 more source