To make the story very short (and indeed it went on more and more and more and almost lead the mild mannered T to close up the comments) Svalgaard propounds (go read Tamino) that there is no difference in solar insolation between solar
cycle minima extending back to the year dot, and the year dot includes our beloved Maunder minima.
Not exact matches
An
extended minimum occurs whenever the plasma moves quickly at the beginning of a
cycle — preventing a large buildup of magnetic fields — but then slows down toward the end, delaying the onset of the next
cycle, the team reports online today in Nature.
Therefore, we must try to
extend the solar record to assess whether its activity is indeed increasing at the
minima of the
cycles (and its irradiance is also increasing) and to assess its potential influence on the climate.
«Recent activity maxima have actually been rather quiet and the last
cycle had a long,
extended minimum,» notes Elsworth.
«It will be interesting to see if the
minimum of this current
cycle is
extended in the manner of the previous one or if it will soon be back to the conditions of the past.
When Tony showed me his 100 - year extension of CET I was impressed that the Hale
cycle could be seen in it, even
extending across the Maunder
minimum which was quite remarkable.
There are at least 2 papers that talk about a «phase catastrophe» during the Maunder and Dalton
minima implying either a period when the solar poles are both the same polarity for an
extended period or the
cycle goes to 22 years instead of 11, I also think its highly possible that both poles could fluctuate between positive and negative through the entire
cycle if the new polar inflows are not strong enough to change the polarity.
As Figure 2 shows, the unadjusted data (pink) have tended to fall towards the lower end of IPCC projections in recent years, primarily due to the preponderance of La Niña events and an
extended solar
cycle minimum, which have short - term cooling influences on global surface temperatures.
So naturally modern descriptions of the variable
cycle of the Gleissberg
cycle of solar
minima have been
extended to as much 80 - 130 years.
The Centennial, and Pentadecadal solar
cycles are observable in the last 400 - year sunspot record, and they are responsible for the present
extended solar
minimum that started in 2008.
Feynman
cycle lows (
extended minima) are characterized by very low annual sunspot numbers (less than 3, figure 89 a, black arrows and blue asterisks), and a slight increase in the duration of the 11 - year
cycle (figure 89 d).
The ~ 100 - year Feynman solar
cycle is responsible for the present
extended solar
minimum.