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The chaotic solar cycle: I. Analysis of cosmogenic 14C-data


Hanslmeier, Arnold; Brajša, Roman
The chaotic solar cycle: I. Analysis of cosmogenic 14C-data // Astronomy and astrophysics review, 509 (2010), A5-1 doi:10.1051/0004-6361/200913095 (međunarodna recenzija, članak, znanstveni)


Naslov
The chaotic solar cycle: I. Analysis of cosmogenic 14C-data

Autori
Hanslmeier, Arnold ; Brajša, Roman

Izvornik
Astronomy and astrophysics review (0935-4956) 509 (2010); A5-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
solar-terrestrial relations; Sun: activity; Sun: general

Sažetak
The study of solar activity over long time intervals using proxies. The periodicity of the solar activity cycle is studied. The solar activity cycle is governed by a complex dynamo mechanism. Methods of nonlinear dynamics enable us to learn more about the regular and chaotic behavior of solar activity. By applying methods of nonlinear dynamics, the solar activity cycle is studied by using solar activity proxies that have been reaching into the past for over 10 000 years. The complexity of the system is expressed by several parameters of nonlinear dynamics, such as embedding dimension or false nearest neighbors, and the method of delay coordinates is applied to the time series. The solar activity cycle is found to be on the edge of chaotic behavior. This can explain the observed intermittent period of longer lasting solar activity minima. Filtering the data by eliminating variations below a certain period (the periods 380 yr and 57 yr were used) yields a far more regular behavior of solar activity. The solar time series of solar activity proxies used here clearly shows that solar activity behaves differently from random data. The unfiltered data exhibit a complex dynamics requiring an embedding dimension >15. The variations become more regular when filtering the data. The results also indicate that solar activity proxies are influenced by other than solar variations and reflect solar activity only on longer time scales.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
007-0000000-1364 - Fizikalni procesi u atmosferama Sunca i zvijezda (Vladimir Ruždjak, )

Ustanove
Geodetski fakultet, Zagreb

Profili:

Avatar Url Roman Brajša (autor)

Citiraj ovu publikaciju

Hanslmeier, Arnold; Brajša, Roman
The chaotic solar cycle: I. Analysis of cosmogenic 14C-data // Astronomy and astrophysics review, 509 (2010), A5-1 doi:10.1051/0004-6361/200913095 (međunarodna recenzija, članak, znanstveni)
Hanslmeier, A. & Brajša, R. (2010) The chaotic solar cycle: I. Analysis of cosmogenic 14C-data. Astronomy and astrophysics review, 509, A5-1 doi:10.1051/0004-6361/200913095.
@article{article, year = {2010}, pages = {A5-1-A5-7}, DOI = {10.1051/0004-6361/200913095}, keywords = {solar-terrestrial relations, Sun: activity, Sun: general}, journal = {Astronomy and astrophysics review}, doi = {10.1051/0004-6361/200913095}, volume = {509}, issn = {0935-4956}, title = {The chaotic solar cycle: I. Analysis of cosmogenic 14C-data}, keyword = {solar-terrestrial relations, Sun: activity, Sun: general} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • NASA Astrophysics Data System


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