date: Tue Apr 24 11:02:11 2007 from: Keith Briffa subject: Re: to: E.Karslake@uea.ac.uk Sorry Eli just seen your message- its up to you , but some discussion of the drought /solar or solar/lunar mixed forcing as far as the evidence goes would be good. This is a controversial topic and if true I do not think the mechanisms are known anyway. Hope this helps Keith At 16:42 23/04/2007, you wrote: hi keith do i need to cover how these factors affect drought in my presentations on mechanisms or is it sufficient just to mention them; Hale solar magnetic cycle the lunar nodal tidal cycle the Pacific Decadal Oscillation the North Atlantic Oscillation (NAO) thanks, elie.