Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cha%26a..31..261l&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 31, Issue 3, p. 261-269.
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
The EMD (empirical mode decomposition) method has exhibited superiority and potential in applications related to the processing of nonlinear and unsteady time sequences. For the research of periodicity of solar activity by means of the EMD method, the monthly mean values of sunspot numbers in 110 years (1894 2003) and 55 years (1949-2003) are analyzed, resulting in a series of modes and one trend term. For all of them the periodic components of 1.3 1.4 years, QBO (quasi-biannual oscillation) components of 25 30 months, the 11-year solar cycle component as well as the 22-year Hale cycle component are possibly included. The amplitude of the component of the 11-year cycle is the largest, and the characteristics of variation of this component are highly correlated with the original data of sunspot numbers. Being different from traditional methods, the EMD technique can provide the characteristics of isolated features on various time scales.
Li Qiang
Wu Jian
Wu Jun
Xu Zheng-Wen
No associations
LandOfFree
Extraction of the Periodic Components of Solar Activity with the EMD Method does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Extraction of the Periodic Components of Solar Activity with the EMD Method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extraction of the Periodic Components of Solar Activity with the EMD Method will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1662391