Titlebook: Secular Solar and Geomagnetic Variations in the Last 10,000 Years; F. R. Stephenson (Institute Director),A. W. Wolfen Book 1988 Kluwer Aca

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Long and Short Cycles in Solar Activity During the Last MillenniaMitchell, 1977) and that stars like the Sun evolve on a timescale of a billion years (Soderblom and Baliunas, 1988). Thus one should expect that its activity is subjected to more or less regular oscillations. The study of the likely laws ruling these oscillations (periodicities, power spectra etc.)

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cinder

Vertical

The Pattern of Large-Scale Convection in the Suntation axis. This picture has been called ‘cartridge belt’ convection or ‘banana cell’ convection. The theoretical reasoning behind this pattern is that the Taylor-Proudman theorem for a rotating fluid constrains the fluid to be as near two-dimensional as is consistent with spherical geometry. This

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Allergic

The Behaviour of Solar Activity as Inferred from Sunspot Observations 165 BC to 1986(Wittmann and Xu, 1987), to which recently has been appended a catalogue of naked-eye sunspots of the period 1764 to 1986. Our main results are as follows: between AD 302 and 1980 there are 44 conspicuous maxima which may be expressed as: Year (Max.) = 4.0 + 11.116xN (where N - 178 for the maximum o

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Pedagogy

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聯(lián)合

The Solar Diameter Since 1715r. Claims for secular decreases, increases and periodicities on a wide range of time scales have all been proposed and, at some later time, they have all been disputed. If significant changes in the size of the Sun were established they would lead to variations in the gravitational potential energy