dc.contributor.author |
Rangarajan, G.K. |
|
dc.date.accessioned |
2015-05-13T06:21:02Z |
|
dc.date.accessioned |
2021-02-12T09:34:13Z |
|
dc.date.available |
2015-05-13T06:21:02Z |
|
dc.date.available |
2021-02-12T09:34:13Z |
|
dc.date.issued |
1998 |
|
dc.identifier.citation |
Earth Planets Space,v.50, p.91-100, 1998, doi: 10.1186/BF03352090 |
en_US |
dc.identifier.uri |
http://localhost:8080/xmlui/handle/123456789/64 |
|
dc.description.abstract |
The series of annual mean relative sunspot numbers (R z) for 1749–1996 is subjected to the recently developed methodology of Singular Spectrum Analysis (SSA). This technique also enables data-adaptive filtering of the individual spectral components. Low order autoregressive modelling of the components are combined to provide a basis for predicting the solar cycle 23.
The R z series is largely dominated by a doublet with periods 11.13 and 10.35 yr. close to the nominal solar cycle periodicity, a longer period variation (~110 yr.) which is the envelope of the amplitude maxima and two clusters of periodicities centred around 8 yr. and 5.5 yr. The solar magnetic cycle has no detectable component. The predicted maximum for cycle 23 will have a magnitude of ~130 and the epoch of maximum is expected between late 2000 A.D. and early 2001 A.D. |
en_US |
dc.language.iso |
en |
en_US |
dc.subject |
Predict solar cycle |
en_US |
dc.subject |
Relative sunspot numbers |
en_US |
dc.subject |
Singular spectrum analysis |
en_US |
dc.title |
Sunspot variablity and an attempt to predict solar cycle 23 by adaptive filtering |
en_US |
dc.type |
Article |
en_US |
dc.identifier.accession |
090553 |
|