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Titolo:
Strength and phase of the solar dynamo during the last 12 cycles
Autore:
Ruzmaikin, A; Feynman, J;
Indirizzi:
CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA CALTECH Pasadena CA USA 91109 LTECH, Jet Prop Lab, Pasadena, CA 91109 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A8, volume: 106, anno: 2001,
pagine: 15783 - 15789
SICI:
0148-0227(20010801)106:A8<15783:SAPOTS>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
GEOMAGNETIC-ACTIVITY; WIND; PREDICTION; ROTATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Ruzmaikin, A CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA CALTECH 4800 Oak Grove Dr Pasadena CA USA 91109 CA 91109 USA
Citazione:
A. Ruzmaikin e J. Feynman, "Strength and phase of the solar dynamo during the last 12 cycles", J GEO R-S P, 106(A8), 2001, pp. 15783-15789

Abstract

We use the nn index of geomagnetic activity recorded for 1.30 years to study the strength and phase properties of the solar dynamo. We split the monthly averaged cta into two pacts: one part proportional to the sunspot number and the other part proportional to the residual. We argue that the first part is a prosy for the solar dynamo's large-scale mean toroidal magnetic field. The residual has the same periodicity as the sunspot cycle and has closely related amplitude, but: is shifted in phase. WE relate this residual to the poloidal field generated from the toroidal field in the dynamo process. The changes in both components demonstrate that there was a long-term trend in the strength and relative phases of the toroidal and poloidal components of the mean-field dynamo. The changes in the relative phase of the toroidal and poloidal fields suggest that the distributions of the differential rotation and helicity within the Sun's convection zone have changed overtimescales of 50 years.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 18:43:16