Results 41 to 50 of about 1,100 (241)

Modeling the Effects of Drift Orbit Bifurcation on the Magnetopause Shadowing Loss of Radiation Belt Electrons

Geophysical Research Letters, 2023
Last closed drift shell (LCDS) has been identified as a crucial parameter for investigating the magnetopause shadowing loss of radiation belt electrons.
Jinbei Huang, Xingzhi Lyu, Weichao Tu, Jay M. Albert, Sang‐Yun Lee   +4 more
doaj   +1 more source

A statistical analysis of the Kappa-type energy spectrum distribution of radiation belt electrons observed by Van Allen Probes

Earth and Planetary Physics
The energy spectrum of energetic electrons is a key factor representing the dynamic variations of Earth’s Van Allen radiation belts. Increased measurements have indicated that the commonly used Maxwellian and Kappa distributions are inadequate for ...
LuHuai Jiao, Xin Ma, YuanNong Zhang, TaiFeng Jin, Song Fu, BinBin Ni   +5 more
doaj   +1 more source

Reproducing the observed energy‐dependent structure of Earth's electron radiation belts during storm recovery with an event‐specific diffusion model

Geophysical Research Letters, 2016
We present dynamic simulations of energy‐dependent losses in the radiation belt “slot region” and the formation of the two‐belt structure for the quiet days after the 1 March storm.
J.‐F. Ripoll, G. D. Reeves, G. S. Cunningham, V. Loridan, M. Denton, O. Santolík, W. S. Kurth, C. A. Kletzing, D. L. Turner, M. G. Henderson, A. Y. Ukhorskiy   +10 more
doaj   +1 more source

Empirically Estimated Electron Lifetimes in the Earth's Radiation Belts: Van Allen Probe Observations [PDF]

Geophysical Research Letters, 2020
AbstractWe use measurements from NASA's Van Allen Probes to calculate the decay time constants for electrons over a wide range of energies (30 keV to 4 MeV) and values ( = 1.3–6.0) in the Earth's radiation belts. Using an automated routine to identify flux decay events, we construct a large database of lifetimes for near‐equatorially mirroring ...
T. P. O'Brien, J. B. Blake, J. F. Fennell, Qianli Ma, Qianli Ma, Seth G. Claudepierre, Seth G. Claudepierre, Jacob Bortnik   +7 more
openaire   +6 more sources

The Stochastic‐Dissipative Störmer Problem‐Trajectories and Radiation Patterns

Annalen der Physik, EarlyView.
We consider charged particle motion and radiation in a dipole magnetic field, in the presence of friction and of stochastic forces. The numerical solutions of the Langevin equation reveal how these forces modify the complex dynamics of particles, and they offer some new insights into the nonlinear processes relevant to planetary radiation belts ...
Tiberiu Harko, Gabriela Raluca Mocanu
wiley   +1 more source

Identifying Typical Relativistic Electron Pitch Angle Distributions: Evolution During Geomagnetic Storms

Geophysical Research Letters
Van Allen radiation belt electron dynamics are governed by a multitude of physical processes that can simultaneously drive acceleration, transport and loss.
S. Killey, I. J. Rae, A. W. Smith, S. N. Bentley, C. E. J. Watt, S. Chakraborty, L. G. Ozeke, M.‐T. Walach, J. K. Sandhu, D. Rasinskaite   +9 more
doaj   +1 more source

Challenges of understanding the variability of the Van Allen radiation belts

, 2023
Understanding the variability of the Van Allen radiation belts, populations of energetic particles trapped on fairly stable orbits within the Earth’s magnetosphere, has been one of the outstanding questions in heliophysics research. NASA’s Van Allen Probes Mission (2012-2019), two identical probes in low inclination geo-transfer orbit (GTO), has been ...
openaire   +2 more sources

The Cenomanian–Turonian boundary interval in the Western Canada Foreland Basin: Stratigraphy, geochemistry, geochronology and sea‐level changes recorded in expanded and condensed clastic successions

The Depositional Record, EarlyView.
Shallow‐marine mudstone of the Cretaceous Kaskapau Formation in the British Columbia foredeep preserves a 185 m thick record of OAE2. The organic carbon‐isotope and osmium‐isotope excursions can be correlated in detail with other Cenomanian–Turonian boundary sections around the world.
A. Guy Plint, Darren R. Gröcke, David Selby, Ireneusz Walaszczyk, Sandra L. Kamo, Ian Jarvis, João Trabucho‐Alexandre, Jessica Flynn, Frederick J. Longstaffe, Kienan P. Marion, Bogdan L. Varban, Alice D. C. Du Vivier, David Uličný   +12 more
wiley   +1 more source

PreMevE Update: Forecasting Ultra‐Relativistic Electrons Inside Earth's Outer Radiation Belt

Space Weather, 2021
Energetic electrons inside Earth's Van Allen belts pose a major radiation threat to space‐borne electronics that often play vital roles in modern society. Ultra‐relativistic electrons with energies greater than or equal to two megaelectron‐volt (MeV) are
Saurabh Sinha, Yue Chen, Youzuo Lin, Rafael Pires de Lima   +3 more
doaj   +1 more source

Controls on carbonate island formation and evolution: South Joulter Cay, Great Bahama Bank

The Depositional Record, EarlyView.
The evolution of South Joulter Cay occurs in three stages: linear ridges shaped by waves and longshore currents, arcuate ridges influenced by tidal currents and channels, and cuspate ridges formed by variable wind and wave directions. These processes are driven by climatic and oceanographic factors.
Juan Carlos Laya, Paul ‘Mitch’ Harris, Peter J. van Hengstum, Miles Frazer   +3 more
wiley   +1 more source