- Is a Mini-Ice age on the way starting in 2030? That's hard to say because of Global warming here on earth. Could the two cancel each other out and just confuse the hell out of everyone? Yes. This is a possibility too! So, the danger for mankind here I would say is not having enough knowledge to make sense of all of these many many factors and not just human caused Global Warming.
- Solar astronomy – the study of our Sun
Jan 18, 2014 - "If you want to go back to see when the Sun was this inactive... ... latter half of the 17th Century, the Sun went through an extremely quiet phase ...
Jun 27, 2016 - The Sun has likely already entered into a new unpredicted long-term ... found that the Sun is currently in a special phase of its magnetic evolution. ... it will remain magnetically inactive for the rest of its hydrogen-burning life.
www.independent.co.uk › News › Science
Jun 23, 2015 - ... of the Sun entering the same kind of cooling phase that allowed “frost ... next half century the world will experience a “grand solar minimum”, ...
Jun 14, 2011 - For centuries scientists have been using sunspots—some of which can be wider than Earth—to track the sun's magnetic highs and lows.
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THE MAUNDER MINIMUM
The Maunder Minimum (also known as the prolonged sunspot minimum) is the name used for the period starting in about 1645 and continuing to about 1715 when sunspots became exceedingly rare, as noted by solar observers of the time.
It caused London's River Thames to freeze over, and 'frost fairs' became popular.
This period of solar inactivity also corresponds to a climatic period called the 'Little Ice Age' when rivers that are normally ice-free froze and snow fields remained year-round at lower altitudes.
There is evidence that the Sun has had similar periods of inactivity in the more distant past, Nasa says.
The connection between solar activity and terrestrial climate is an area of on-going research.
Some scientists hypothesize that the dense wood used in Stradivarius instruments was caused by slow tree growth during the cooler period.
Instrument maker Antonio Stradivari was born a year before the start of the Maunder Minimum.
Maunder Minimum (also known as the prolonged sunspot minimum) is the name used for the period starting in about 1645 and continuing to about 1715 when sunspots became exceedingly rare, as noted by solar observers of the time
It is 172 years since a scientist first spotted that the Sun's activity varies over a cycle lasting around 10 to 12 years.
But every cycle is a little different and none of the models of causes to date have fully explained fluctuations.
The Frozen Thames, 1677 - an oil painting by Abraham Hondius shows the old London Bridge during the Maunder Minimum
Many solar physicists have put the cause of the solar cycle down to a dynamo caused by convecting fluid deep within the Sun.
Now, Zharkova and her colleagues have found that adding a second dynamo, close to the surface, completes the picture with surprising accuracy.
'We found magnetic wave components appearing in pairs, originating in two different layers in the Sun's interior,' she said.
'They both have a frequency of approximately 11 years, although this frequency is slightly different, and they are offset in time.
'Over the cycle, the waves fluctuate between the northern and southern hemispheres of the Sun. Combining both waves together and comparing to real data for the current solar cycle, we found that our predictions showed an accuracy of 97%,' said Zharkova.
Montage of images of solar activity between August 1991 and September 2001 taken by the Yohkoh Soft X-ray Telecope, showing variation in solar activity during a sunspot cycle.
Zharkova and her colleagues derived their model using a technique called 'principal component analysis' of the magnetic field observations from the Wilcox Solar Observatory in California.
They examined three solar cycles-worth of magnetic field activity, covering the period from 1976-2008.
In addition, they compared their predictions to average sunspot numbers, another strong marker of solar activity.
All the predictions and observations were closely matched.