Results 31 to 40 of about 7,649,591 (233)

High‐Latitude Electrodynamics Specified in SAMI3 Using AMPERE Field‐Aligned Currents

open access: yesSpace Weather, 2022
A new technique has been developed to determine the high‐latitude electric potential from observed field‐aligned currents (FACs) and modeled ionospheric conductances.
A. T. Chartier   +5 more
doaj   +1 more source

Swarm field-aligned currents during a severe magnetic storm of September 2017 [PDF]

open access: yesAnnales Geophysicae, 2020
Swarm satellite observations are used to characterize the extreme behavior of large- and small-scale field-aligned currents (FACs) during the severe magnetic storm of September 2017.
R. Lukianova
doaj   +1 more source

Magnetospheric signatures of ionospheric density cavities observed by Cluster [PDF]

open access: yes, 2015
AJBR ackowledges support from STFC under consolidated grant ST/K000993/1.We present Cluster measurements of large amplitude electric fields corre- lated with intense downward field-aligned currents, observed during a nightside crossing of the auroral ...
Wright, A. N.   +9 more
core   +1 more source

Ionosphere-magnetosphere coupling and field-aligned currents

open access: yesRevista Brasileira de Ensino de Física
It is presented in this paper a review of one of several interactions between the magnetosphere and the ionosphere through the field-aligned currents (FACs).
D. Oliveira
doaj   +1 more source

Auroral streamers: characteristics of associated precipitation,convection and field-aligned currents [PDF]

open access: yesAnnales Geophysicae, 2004
During the long-duration steady convection activity on 11 December 1998, the development of a few dozen auroral streamers was monitored by Polar UVI instrument in the dark northern nightside ionosphere.
V. A. Sergeev   +5 more
doaj   +1 more source

Influences of various space current systems on the geomagnetic field in near-Earth space

open access: yesEarth and Planetary Physics, 2023
Ground and space-based observations of the geomagnetic field are usually a superposition of different sources from the Earth’s core, lithosphere, ocean, ionosphere, and magnetosphere, and also from field-aligned currents coupling the ionosphere and ...
YaBing Wang   +8 more
doaj   +1 more source

Excitation of zero-frequency magnetic field-aligned currents by ionospheric heating [PDF]

open access: yesAnnales Geophysicae, 2011
Time-dependent, three-dimensional numerical simulations of the reduced MHD model describing shear Alfvén waves in the magnetosphere provide an interesting prediction superficially similar to results of several ionospheric heating experiments conducted
A. V. Streltsov   +3 more
doaj   +1 more source

Multiscale Features of Magnetic Field Fluctuations and Field-Aligned Currents in the Polar Ionosphere: A Case Study

open access: yesUniverse, 2022
Complexity is a typical feature of space plasmas that may involve the formation of multiscale coherent magnetic and plasma structures. The winding features (pseudo-polarization) of magnetic field fluctuations at different spatial scales are a useful ...
Giuseppe Consolini   +6 more
doaj   +1 more source

Responses of the field-aligned currents in the plasma sheet boundary layer to a geomagnetic storm

open access: yesEarth and Planetary Physics, 2023
Geomagnetic storms can result in large magnetic field disturbances and intense currents in the magnetosphere and even on the ground. As an important medium of momentum and energy transport among the solar wind, magnetosphere, and ionosphere, field ...
YuanQiang Chen   +5 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

open access: yesFEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa   +5 more
wiley   +1 more source

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