A recent short paper in Journal of Atmospheric and Solar-Terrestrial Physics (20th March 2012) is appraising past research on planetary interaction with the sun, citing many names known to Talkshop regulars, concluding there is no major effect and that the next and under researched place to look is the tachocline.
Dirk K. Callebaut, Cornelis de Jager, Silvia Duhau
University of Antwerp,
Royal Netherlands Institute for Sea Research,
Departamento de Fi ´sica, Facultad Ingeniera, Universidad de Buenos Aires
“a b s t r a c t
We present a physical analysis of the occasionally forwarded hypothesis that solar variability, as shown in the various photospheric and outer solar layer activities, might be due to the Newtonian attraction by the planets. We calculate the planetary forces exerted on the tachocline and thereby not only include the immediate forces but we also take into account that these planetary or dynamo actions occur during some time, which demands integration. As an improvement to earlier research on this topic we reconsider the internal convective velocities and we examine several other effects, in particular those due to magnetic buoyancy and to the Coriolis force. The main conclusion is that in its essence: planetary influences are too small to be more than a small modulation of the solar cycle. We do not exclude the possibility that the long term combined action of the planets may induce small internal motions in the sun, which may have indirectly an effect on the solar dynamo after a long time.
(c)2012 Published by Elsevier Ltd.”
I suspect this paper will be of great interest to some Talkshop regulars. I will leave it to speak for itself.
The contact author is Jager, a veteran who has a WordPress site, part in Netherlandic and part in English where you will find many interesting papers. The Welkom page.
I request care over copyright, particularly given the current disputes, let someone else fight that battle. (example)
Posted by Tim Channon, co-moderator