Abstract:
The unexpected development of cycle 24 emphasizes the need for a better way to model future solar activity. In this article, we analyze the accumulation of spotless days during individual cycles from 1798 – 2010. The analysis shows that spotless days do not disappear abruptly in the transition toward an active Sun. A comparison with past cycles indicates that the ongoing accumulation of spotless days is comparable to that of cycle 5 near the Dalton minimum and to that of cycles 12, 14, and 15. It also suggests that the ongoing cycle has as much as 20±8 spotless days left, from July 2010, before it reaches the next solar maximum. The last spotless day is predicted to be in December 2012, with an uncertainty of 11 months. This trend may serve as input to the solar dynamo theories.
Tallbloke's Talkshop 
pdf at: http://arxiv.org/PS_cache/arxiv/pdf/1104/1104.4624v2.pdf
Thanks Roger
Agreed this is a possibility. Of course here in NE Oregon USA, we have had a cold wet spring haven’t seen the like in-30 years…Hmmm..
Schwabe instantaneous cycle length.
See
http://daedalearth.wordpress.com/2011/05/16/solar-schwabe-cycle-instantaneous-period/
“The frequency distribution of solar proton events:
5 solar cycles and 45 solar cycles
D. F. Smarta, M. A. Sheaa, G. A. M. Dreschhoffc, H. E. Spencec, and L. Kepkoc
Emeritus at AFRL (VSBX), Hanscom AFB, Bedford, MA, 01731, USA,
Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66047, USA
Boston University, (CAS), 725 Commonwealth Avenue, Boston, MA, 02215 USA”
Click to access poster.pdf
More.
The previous paper mentions ignored data, assumed to be outliers but shown to be not so.
Now we find cross checks Arctic/Antarctic.
And “At this Greenland location more precipitation during summer;
nearly a factor of 2 larger than winter months.” combined with noticing more events during daylight period.
I wonder if this starts to get at when 10BE flux disagree between poles, is it precipitation difference? Could it also be about summer/winter? Would that be magnetics. Then what about the connection with O3?
Click to access Smart.pdf
Slightly O/T, but worthy of note – a boost for Svensmark’s GCR theory :
http://science.au.dk/en/news-and-events/news-article/artikel/forskere-fra-au-og-dtu-viser-at-partikler-fra-rummet-skaber-skydaekke/
Tallbloke, just download from Warwick Hughes blog an interesting article from 2007 about the findings of Rhodes Fairbridge who predicted cooling from quiter sunspot cycles 24, 25 & 26. You may have seen the article here http://www.warwickhughes.com/agri/fairbridge_rhodes.pdf The article has lots more about the sun its movements and effects- also a great list of references
keep strong