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Solar Cycle Variation in Solar Irradiance [PDF]

Space Science Reviews, 2014
The correlation between solar irradiance and the 11-year solar activity cycle is evident in the body of measurements made from space, which extend over the past four decades. Models relating variation in solar irradiance to photospheric magnetism have made significant progress in explaining most of the apparent trends in these observations.
Natalie Krivova, Sami Solanki, Kok Leng Yeo   +2 more
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The solar cycle: predicting the peak of solar cycle 25

Astrophysics and Space Science, 2020
Motivated by a successful prediction on the peak of solar cycle 24 (81.7, comparable to the observed 81.9, Du in Astrophys. Space Sci. 338:9, 2012), based on the logarithmic relationship between the maximum amplitude ( $R_{ \mathrm{m}}$ ) of a solar cycle and the preceding minimum $aa$ geomagnetic index ( $aa_{\mathrm{min}}$ ), we perform a ...
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The solar cycle

Physics Today, 1982
Nearly 140 years have elapsed since the German apothecary and amateur astronomer Samuel Heinrich Schwabe reported discovery of the solar cycle. “From my earlier observations,” Schwabe wrote in 1843, “it appears that there is a certain periodicity in the appearance of sunspots and this theory seems more and more probable from the results of this year ...
Gordon Newkirk, Kendrick Frazier
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Theory of the solar cycle

Solar Physics, 1981
The properties of kinematic αω -dynamos are briefly reviewed. The mean field concept, including turbulent diffusivity, is defended against recent criticism. It is pointed out that although the Maunder minimum cannot be explained by kinematic dynamo theory alone, this does not invalidate dynamo theory in general.
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Change of Solar Oscillation Eigenfrequencies with the Solar Cycle

Nature, 1985
Solar p-mode eigenfrequencies depend on the radial stratification of the solar interior and this stratification may be perturbed by the mechanism of the 11-year magnetic activity cycle. Observations of long-term changes in p-mode oscillation frequencies may therefore help to identify the cause of the solar cycle.
Martin F. Woodard, Robert W. Noyes
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Solar Wind Variation with the Cycle

International Astronomical Union Colloquium, 2000
AbstractThe cyclic evolution of the heliospheric plasma parameters is related to the time-dependent boundary conditions in the solar corona. “Minimal” coronal configurations correspond to the regular appearance of the tenuous, but hot and fast plasma streams from the large polar coronal holes. The denser, but cooler and slower solar wind is adjacent to
I. S. Veselovsky, A. V. Dmitriev, A. V. Suvorova, M. V. Tarsina   +3 more
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Solar cycles and malignant melanoma

Medical Hypotheses, 1979
There has been a sixfold increase in the incidence of malignant melanoma in the State of Connecticut during the past forty years. Superimposed on a steady incidence rise are cycles of markedly increased incidence rates which follow periods of maximum sunspot activity. We propose that the effect of sunspot cycles on human melanoma occurrence is mediated
M V, Viola, A, Houghton, E W, Munster
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A Simple Model for the Solar Cycle

Solar Physics, 2003
A simple nonlinear model which describes the 11-year solar cycle can be derived from the usual α−ω dynamo theory in the form of a Van der Pol equation. Solar activity displays also small-scale inter-cycle persistent stochastic oscillations with a Hurst exponent of the order of H≃0.76±0.01.
PONTIERI A, LEPRETI, Fabio, SORRISO VALVO L, VECCHIO A, CARBONE V.   +4 more
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The Periodicity of Solar Activity Cycles

Solar Physics, 1994
On the basis of published Wolf Numbers and Schove Row, solar activity cycles in the interval of 11 to hundreds of years have been investigated. In this case the method of investigation of pulsating stars showing the Blazhko effect was applied. The elements of cycles and O-C were calculated and compared with results of solar activity parameters ...
Yu. S. Romanov, N. S. Zgonyaiko
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Solar activity and the solar cycle

Advances in Space Research, 2003
Abstract Solar activity prediction methods have been wide-ranging, mostly numerical, and essentially curve fitting. Thus for many years the search for physically based methods has remained elusive. Surprisingly, a new class of methods does seem to be making progress, and it relates to the structure of the field within the Sun and heliosphere.
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