Mathematics – Dynamical Systems
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992cuny.reptr....s&link_type=abstract
Annual Report, 1 Nov. 1991 - 30 Nov. 1992 Columbia Univ., New York, NY. Astrophysics Lab.
Mathematics
Dynamical Systems
Chaos, Dynamical Systems, Fluid Dynamics, Helioseismology, Nonlinear Systems, Oscillators, Solar Activity, Solar Cycles, Stellar Models, Sunspots, Mathematical Models, Periodic Variations, Stellar Rotation
Scientific paper
In modeling the solar cycle, we proceed on the assumption that the processes driving the solar cycle are deterministic. In that case, a chaotic model is a good choice for a description of its complexity. In our modeling, we suppose that the solar activity variation is composed of two distinct, coupled processes: one a conventionally chaotic system, and the other a nonlinear oscillator. This idea comes directly from our analysis of the observations. Since the sun's rotation period is one month, we do not use the daily sunspot number, but work with its monthly average. This quantity shows both the cyclic variation on the eleven year time scale and additional strong fluctuations. If we smooth the data to remove periods less than a year to two, we see the solar cycle clearly exposed. When we subtract this smoothed sunspot number from the monthly average, we obtain the fluctuations in the sunspot number. We show a comparison between the monthly averaged number and the fluctuations for a few cycles. There is a clear correlation between the level of solar activity, as measured by the sunspot number, and the amplitude of the fluctuations in this number. We suggest that the fluctuations and the cyclic behavior correspond to two distinct but interacting processes.
No associations
LandOfFree
Chaotic dynamics of the solar cycle 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 Chaotic dynamics of the solar cycle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chaotic dynamics of the solar cycle will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1552083