Abstract The solar magnetic field varies on all time scales. Recent analysis of 600 million year-old Australian varves shows terrestrial evidence for not only the familiar 22-year magnetic cycle, but variations with periods of 300–400 years as well. The Maunder minimum is but one of several long intervals showing atypical levels of solar activity. Recently a 151-day periodicity in flare activity has been found. Active regions, sunspots, ephemeral regions, and flares cover a broad range of shorter time scale variations in the solar magnetic field. Long-term variations can be interpreted in at least two ways. One outlook regards the large-scale and long-term variations of the photospheric field as more-or-less direct guides to the organization of the solar field as it evolves through a solar cycle. The slowly varying field reveals the fundamental interior structure of the Sun. An alternative view interprets the surface manifestation of the magnetic field primarily as the result of the convective motions in the solar atmosphere. The evolving distribution of photospheric flux depends upon the locations of emerging flux and the subsequent motions and interactions of the fields in the moving plasma. Information about the interior field comes largely from analysis of emerging flux. We discuss interpretation of the phenomenology of the long-term variability in the context of these contrasting views.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Long-term variability of solar magnetic fields


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    01.01.1989


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Long-term variability of solar magnetic fields

    Todd Hoeksema, J. / Scherrer, P.H. | Elsevier | 1988

    Freier Zugriff

    Long-term variability of solar magnetic-fields

    Hoeksema, J. Todd / Scherrer, P. H. | NTRS | 1988


    Long term variability of solar activity

    Kontor, N.N. | Elsevier | 1993


    Major solar flares and long-term variability in Antarctic ice cores

    Dreschhoff, G.A.M. / Zeller, E.J. / Qin, D. et al. | Elsevier | 1993


    Long-Term Variability of Single High-Field Magnetic White Dwarfs

    Bues, I. / Engelhardt, D. | British Library Online Contents | 1998