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| Titel |
Reconstruction of geomagnetic activity and near-Earth interplanetary conditions over the past 167 yr – Part 2: A new reconstruction of the interplanetary magnetic field |
| VerfasserIn |
M. Lockwood, L. Barnard, H. Nevanlinna, M. J. Owens, R. G. Harrison, A. P. Rouillard, C. J. Davis |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 31, no. 11 ; Nr. 31, no. 11 (2013-11-18), S.1979-1992 |
| Datensatznummer |
250086145
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| Publikation (Nr.) |
 copernicus.org/angeo-31-1979-2013.pdf |
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| Zusammenfassung |
| We present a new reconstruction of the
interplanetary magnetic field (IMF, B) for 1846–2012 with a full analysis of
errors, based on the homogeneously constructed IDV(1d) composite of geomagnetic
activity presented in Part 1 (Lockwood et al., 2013a). Analysis of the dependence of the
commonly used geomagnetic indices on solar wind parameters is presented
which helps explain why annual means of interdiurnal range data, such as the
new composite, depend only on the IMF with only a very weak influence of the
solar wind flow speed. The best results are obtained using a polynomial
(rather than a linear) fit of the form B = χ · (IDV(1d) − β)α
with best-fit coefficients χ = 3.469, β =
1.393 nT, and α = 0.420. The results are contrasted with the
reconstruction of the IMF since 1835 by Svalgaard and Cliver (2010). |
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