scholarly journals Examining Local Time Variations in the Gains and Losses of Open Magnetic Flux During Substorms

2020 ◽  
Vol 125 (4) ◽  
Author(s):  
M. K. Mooney ◽  
C. Forsyth ◽  
I. J. Rae ◽  
G. Chisham ◽  
J. C. Coxon ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Local Time ◽  
Time Variations ◽  
Open Magnetic Flux ◽  
Gains And Losses

FeNi-based flat magnetoimpedance nanostructures with open magnetic flux: New topological approaches

2015 ◽  
Vol 383 ◽  
pp. 220-225 ◽  
Author(s):  
G.V. Kurlyandskaya ◽  
A.A. Chlenova ◽  
E. Fernández ◽  
K.J. Lodewijk
Keyword(s):  
Magnetic Flux ◽  
Open Magnetic Flux

scholarly journals Aurora and open magnetic flux during isolated substorms, sawteeth, and SMC events

2007 ◽  
Vol 25 (8) ◽  
pp. 1865-1876 ◽  
Author(s):  
A. D. DeJong ◽  
X. Cai ◽  
R. C. Clauer ◽  
J. F. Spann
Keyword(s):  
Magnetic Flux ◽  
Temporal Variations ◽  
Auroral Oval ◽  
Polar Cap ◽  
Expansion Phase ◽  
Magnetospheric Convection ◽  
Open Magnetic Flux ◽  
Open Flux ◽  
The Individual

Abstract. Using Polar UVI LBHl and IMAGE FUV WIC data, we have compared the auroral signatures and polar cap open flux for isolated substorms, sawteeth oscillations, and steady magnetospheric convection (SMC) events. First, a case study of each event type is performed, comparing auroral signatures and open magnetic fluxes to one another. The latitude location of the auroral oval is similar during isolated substorms and SMC events. The auroral intensity during SMC events is similar to that observed during the expansion phase of an isolated substorm. Examination of an individual sawtooth shows that the auroral intensity is much greater than the SMC or isolated substorm events and the auroral oval is displaced equatorward making a larger polar cap. The temporal variations observed during the individual sawtooth are similar to that observed during the isolated substorm, and while the change in polar cap flux measured during the sawtooth is larger, the percent change in flux is similar to that measured during the isolated substorm. These results are confirmed by a statistical analysis of events within these three classes. The results show that the auroral oval measured during individual sawteeth contains a polar cap with, on average, 150% more magnetic flux than the oval measured during isolated substorms or during SMC events. However, both isolated substorms and sawteeth show a 30% decrease in polar cap magnetic flux during the dipolarization (expansion) phase.

scholarly journals On the influence of open magnetic flux on substorm intensity: Ground- and space-based observations

2013 ◽  
Vol 118 (6) ◽  
pp. 2958-2969 ◽  
Author(s):  
L. B. N. Clausen ◽  
S. E. Milan ◽  
J. B. H. Baker ◽  
J. M. Ruohoniemi ◽  
K.-H. Glassmeier ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Open Magnetic Flux

scholarly journals Solar wind elemental abundances related to the Sun's open magnetic flux

2009 ◽  
Vol 505 (3) ◽  
pp. 1237-1244 ◽  
Author(s):  
X. Wang ◽  
B. Klecker ◽  
P. Wurz
Keyword(s):  
Solar Wind ◽  
Magnetic Flux ◽  
Elemental Abundances ◽  
Open Magnetic Flux

Schumann-resonance records at three observatories and ULF universal- and local-time variations

2011 ◽  
Vol 53 (12) ◽  
pp. 706-716 ◽  
Author(s):  
A. P. Nickolaenko ◽  
E. I. Yatsevich ◽  
A. V. Shvets ◽  
M. Hayakawa ◽  
Y. Hobara
Keyword(s):  
Local Time ◽  
Schumann Resonance ◽  
Time Variations

Meridional Flow and the Solar Cycle Variation of the Sun’s Open Magnetic Flux

2002 ◽  
Vol 580 (2) ◽  
pp. 1188-1196 ◽  
Author(s):  
Y.‐M. Wang ◽  
N. R. Sheeley, Jr. ◽  
J. Lean
Keyword(s):  
Solar Cycle ◽  
Magnetic Flux ◽  
Meridional Flow ◽  
Solar Cycle Variation ◽  
Cycle Variation ◽  
Open Magnetic Flux

scholarly journals Morphology in the total electron content under geomagnetic disturbed conditions: results from global ionosphere maps

2007 ◽  
Vol 25 (7) ◽  
pp. 1555-1568 ◽  
Author(s):  
Zhao Biqiang ◽  
Wan Weixing ◽  
Liu Libo ◽  
Mao Tian
Keyword(s):  
Geomagnetic Storm ◽  
Local Time ◽  
Statistical Study ◽  
Electron Content ◽  
Geomagnetic Disturbances ◽  
Total Electron ◽  
Summer Hemisphere ◽  
Storm Effect ◽  
Time Variations ◽  
Winter Hemisphere

Abstract. Using 8-year global ionosphere maps (GIMs) of TEC products from the Jet Propulsion Laboratory (JPL), we make a statistical study on the morphology of the global ionospheric behaviors with respect to the geomagnetic disturbances. Results show that the behaviors of TEC during geomagnetic storm present clear seasonal and local time variations under geomagnetic control in a similar way as those of NmF2 (Field and Rishbeth, 1997). A negative phase of TEC occurs with high probability in the summer hemisphere and most prominent near the geomagnetic poles, while a positive phase is obvious in the winter hemisphere and in the far pole region. A negative storm effect toward lower latitudes tends to occur from post-midnight to the morning sector and recedes to high latitude in the afternoon. A positive storm effect is separated by geomagnetic latitudes and magnetic local time. Furthermore, ionospheric responses at different local time sectors with respect to the storm commencement shows very different developing processes corresponding to the evolution of the geomagnetic storm. A daytime positive storm effect is shown to be more prominent in the American region than those in the Asian and European regions, which may suggest a longitudinal effect of the ionospheric storm.

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