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David Archibald’s elegant illustration of how late and weak solar cycle 24 is proving
Tuesday, May 26th 2009, 11:46 AM EDT
Co2sceptic (Site Admin)
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This posting is by David Archibald from October 2008


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There is another way of looking at solar cycles.

Solar cycles actually start with the magnetic reversal near the peak of the previous cycle. The sunspots take seven years to surface and become visible. Almost all sunspot cycles tend to be about 18.5 years long, measured from the peak of the previous cycle.

The above graph compares the average of three cycles, 21 to 23, from the late 20th century with three, 14 to 16, from the late 19th century (which had much colder weather). Also included is Solar Cycle 5, the first half of the Dalton Minimum.

Given we are now 103 months from the peak of Solar Cycle 23, it is now too late to get a late 19th century-type outcome for Solar Cycle 24. Out of the 24 named solar cycles, Solar Cycle 24 is now the latest after Solar Cycle 5.

It is so late that it is now in no man’s land and its weakness is now more of a consideration than lateness in itself.

It is certain that we will be getting a Dalton Minimum-type experience.

David Archibald

This post has been updated

David Archibald’s elegant illustration of how late and weak solar cycle 24 is proving
Source Link: warwickhughes.com
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