Eleven-year cycles of the low-latitude large-scale solar magnetic field, its origin and sources in the convection zone

Details Eleven-year cycles of the low-latitude large-scale solar magnetic field, its origin and sources in the convection zone Eleven-year cycles of the low-latitude large-scale solar magnetic field, its origin and sources in the convection zone

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999soph..187..207r&link_type=abstract

Solar Physics, v. 187, Issue 1, p. 207-222 (1999).

Physics

2

Scientific paper

The description of two components of the 11-year cycle of the large-scale solar magnetic field at the equator and at mid latitudes has been expanded. A conclusion is made that one of them is the result of detection of a dipole field, changing with a period of ~22 years, and another is mainly the equatorial quadrupole field, whose diurnal values are modulated by oscillation with a period of ~11 years. The second component is greater in amplitude than the first one, is similar in shape, and lags behind by ~1 year over two solar cycles. It is suggested that generation sources of both fields are spaced in height inside the convection zone, the quadrupole field being generated at the bottom of the convection zone, and the dipole field - at the top of its middle layers. The probable mechanism of cyclic variations of the two components and the solar activity has been discussed.

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