Deciphering solar turbulence from sunspots records - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2009

Deciphering solar turbulence from sunspots records

Résumé

It is generally believed that sunspots are the emergent part of magnetic flux tubes in the solar interior. These tubes are created at the base of the convection zone and rise to the surface due to their magnetic buoyancy. The motion of plasma in the convection zone being highly turbulent, the surface manifestation of sunspots may retain the signature of this turbulence, including its intermittency. From direct observations of sunspots, and indirect observations of the concentration of cosmogenic isotopes 14C in tree rings or 10Be in polar ice, power spectral densities in frequency are plotted. Two different frequency scalings emerge, depending on whether the Sun is quiescent or active. From direct observations we can also calculate scaling exponents. These testify to a strong intermittency, comparable with that observed in the solar wind.
Fichier principal
Vignette du fichier
400-1-L47.pdf (6.9 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

insu-00499276 , version 1 (10-03-2021)

Identifiants

Citer

Franck Plunian, G. R. Sarson, R. Stepanov. Deciphering solar turbulence from sunspots records. Monthly Notices of the Royal Astronomical Society, 2009, 400 (1), pp.L47 - L51. ⟨10.1111/j.1745-3933.2009.00760.x⟩. ⟨insu-00499276⟩
33 Consultations
22 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More