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- Title
Properties of the sunspot latitudinal distribution skewness.
- Authors
Miletsky, E. V.; Ivanov, V. G.; Nagovitsyn, Yu. A.
- Abstract
The properties of the sunspot latitudinal distributions related to skewness have been studied based on the data of the extended Greenwich catalog for 1874–2011. The results of the performed analysis indicate that a significant skewness is present in most annual latitudinal distributions of the sunspot index. In this case, the distribution skewness increases near the 11-year cycle maximum phase. An increase in the sunspot group number is also accompanied by an increase in skewness. In particular, when the sunspot index is large, the number of groups located below midlatitudes is mostly larger than the number of groups above these latitudes and this imbalance increases with increasing total sunspot activity level. In medium and large 11-year cycles, the average distribution skewness for a cycle is always positive and its value is related to the cycle amplitude. This results agree with the theoretical models of the 11-year cycle, where the specific features of the low-latitude meridional circulation are related to the sunspot activity level.
- Subjects
SUNSPOTS; SUNSPOTS spectra; SKEWNESS (Probability theory); SOLAR surface; CHARTS, diagrams, etc.
- Publication
Geomagnetism & Aeronomy, 2013, Vol 53, Issue 7, p962
- ISSN
0016-7932
- Publication type
Article
- DOI
10.1134/S0016793213080161