scholarly journals Sheared flows and small-scale Alfvén wave generation in the auroral acceleration region

2009 ◽  
Vol 36 (5) ◽  
Author(s):  
K. Asamura ◽  
C. C. Chaston ◽  
Y. Itoh ◽  
M. Fujimoto ◽  
T. Sakanoi ◽  
...  
Keyword(s):  
Wave Generation ◽  
Alfven Wave ◽  
Small Scale ◽  
Acceleration Region ◽  
Auroral Acceleration Region ◽  
Sheared Flows ◽  
Alfvén Wave Generation

Alfvén-wave generation in a beam-plasma system

1982 ◽  
Vol 25 (5) ◽  
pp. 2816-2819 ◽  
Author(s):  
P. K. Shukla ◽  
R. P. Sharma
Keyword(s):  
Wave Generation ◽  
Alfven Wave ◽  
Plasma System ◽  
Beam Plasma ◽  
Alfvén Wave Generation

scholarly journals Interchange Reconnection Alfvén Wave Generation

Solar Physics ◽  
2014 ◽  
Vol 289 (8) ◽  
pp. 3043-3058 ◽  
Author(s):  
B. J. Lynch ◽  
J. K. Edmondson ◽  
Y. Li
Keyword(s):  
Wave Generation ◽  
Alfven Wave ◽  
Alfvén Wave Generation

scholarly journals Assessing the global Alfvén wave power flow into and out of the auroral acceleration region during geomagnetic storms

2019 ◽  
Vol 5 (6) ◽  
pp. eaav8411 ◽  
Author(s):  
Andreas Keiling ◽  
Scott Thaller ◽  
John Wygant ◽  
John Dombeck
Keyword(s):  
Energy Flow ◽  
Geomagnetic Storms ◽  
Alfven Waves ◽  
Alfven Wave ◽  
Societal Implications ◽  
Alfvén Waves ◽  
Acceleration Region ◽  
Large Space ◽  
Fourfold Increase ◽  
Auroral Acceleration Region

Geomagnetic storms are large space weather events with potentially tremendous societal implications. During these storms, the transfer of energy from the solar wind into geospace is largely increased, leading to enhanced energy flow and deposition within the magnetosphere and ionosphere. While various energy forms participate, the rate of total Alfvén wave energy flowing into the auroral acceleration region—where the magnetosphere and ionosphere couple—has not been quantified. Here, we report a fourfold increase in hemispherical Alfvénic power (from 2.59 to 10.05 GW) over a largely expanded oval band covering all longitudes and latitudes between 50° and 85° during the main storm phase compared with nonstorm periods. The Poynting flux associated with individual Alfvén waves reached values of up to about 0.5 W/m2 (mapped to ionospheric altitude). These results demonstrate that Alfvén waves are an important component of geomagnetic storms and associated energy flow into the auroral acceleration region.

scholarly journals KINETIC ALFVÉN WAVE GENERATION BY LARGE-SCALE PHASE MIXING

2015 ◽  
Vol 815 (1) ◽  
pp. 7 ◽  
Author(s):  
C. L. Vásconez ◽  
F. Pucci ◽  
F. Valentini ◽  
S. Servidio ◽  
W. H. Matthaeus ◽  
...  
Keyword(s):  
Large Scale ◽  
Wave Generation ◽  
Alfven Wave ◽  
Phase Mixing ◽  
Kinetic Alfvén Wave ◽  
Kinetic Alfven Wave ◽  
Alfvén Wave Generation

scholarly journals Alfven wave generation by means of high orbital injection of barium cloud in magnetosphere

2002 ◽  
Vol 29 (9) ◽  
pp. 1327-1334 ◽  
Author(s):  
V.N. Oraevsky ◽  
Yu.Ya. Ruzhin ◽  
V.I. Badin ◽  
M.G. Deminov
Keyword(s):  
Wave Generation ◽  
Alfven Wave ◽  
Alfvén Wave Generation ◽  
Orbital Injection

scholarly journals Interchange Reconnection Alfvén Wave Generation

2014 ◽  
pp. 421-436
Author(s):  
B. J. Lynch ◽  
J. K. Edmondson ◽  
Y. Li
Keyword(s):  
Wave Generation ◽  
Alfven Wave ◽  
Alfvén Wave Generation
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