Effects of solar wind magnetosphere coupling recorded at different geomagnetic latitudes: separation of directly-driven and storage/release systems
Effects of solar wind magnetosphere coupling recorded at different geomagnetic latitudes: separation of directly-driven and storage/release systems
The effect on geomagnetic activity of solar wind speed, compared with that of the strength of the interplanetary magnetic field, differs with geomagnetic latitude. In this study we construct a new index based on monthly standard deviations in the H-component of the geomagnetic field for all geomagnetic latitudes. We demonstrate that for this index the response at auroral regions correlates best with interplanetary coupling functions which include the solar wind speed while mid- and low-latitude regions respond to variations in the interplanetary magnetic field strength. These results are used to isolate the responsible geomagnetic current systems.
geomagnetic activity, solar wind magnetosphere coupling
L21105
Finch, I.D.
a41a7ca7-8515-4138-98fb-e25f119febb6
Lockwood, M.L.
40fd6582-dd09-408d-a551-b466ce88c5c8
Rouillard, A.P.
54aa9107-0da0-4006-88cc-b7b0f7b2aa14
12 November 2008
Finch, I.D.
a41a7ca7-8515-4138-98fb-e25f119febb6
Lockwood, M.L.
40fd6582-dd09-408d-a551-b466ce88c5c8
Rouillard, A.P.
54aa9107-0da0-4006-88cc-b7b0f7b2aa14
Finch, I.D., Lockwood, M.L. and Rouillard, A.P.
(2008)
Effects of solar wind magnetosphere coupling recorded at different geomagnetic latitudes: separation of directly-driven and storage/release systems.
Geophysical Research Letters, 35 (21), .
(doi:10.1029/2008GL035399).
Abstract
The effect on geomagnetic activity of solar wind speed, compared with that of the strength of the interplanetary magnetic field, differs with geomagnetic latitude. In this study we construct a new index based on monthly standard deviations in the H-component of the geomagnetic field for all geomagnetic latitudes. We demonstrate that for this index the response at auroral regions correlates best with interplanetary coupling functions which include the solar wind speed while mid- and low-latitude regions respond to variations in the interplanetary magnetic field strength. These results are used to isolate the responsible geomagnetic current systems.
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Published date: 12 November 2008
Keywords:
geomagnetic activity, solar wind magnetosphere coupling
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Local EPrints ID: 146773
URI: http://eprints.soton.ac.uk/id/eprint/146773
ISSN: 0094-8276
PURE UUID: e266d9b0-acbb-46df-900d-1d2be16200cb
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Date deposited: 22 Apr 2010 13:28
Last modified: 14 Mar 2024 00:57
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Author:
I.D. Finch
Author:
M.L. Lockwood
Author:
A.P. Rouillard
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