[null and void]

Medieval SUVs...

[null and void]

GGG ping worthy?

[BuffaloJack]

> Medieval SUVs...
Do you mean Clydesdale horses?
They’d certainly be bigger than the average horse.

[JRandomFreeper]

The researchers set the solar radiation at a constant level in the climate models

Which is absolute crap. The Chineese have been recording sunspots for a thousand years. Persian and Indian astronomers also have records going back hundreds of years. And there was a long dry spell called the Maunder minimum. It lasted from 1645 to 1715.

So called 'climate scientists' are outright liars.

/johnny

[GraceG]

[RockyMtnMan]

It’s important (to progressives/liberals) to peg the cause of the little ice age on volcanic emissions rather than solar radiation because AGW cannot be supported otherwise.

[fireman15]

It seems to me that this article is an attempt to discredit the fairly strong correlation between solar activity and the little ice-age. The University of Colorado, Boulder is an alarmist hot-spot.

At first the alarmists tried to ignore both the little ice age and the medieval warm period that came before it. That didn't work too well for them. Now they are coming up with other explanations that downplay the sun's role and emphasize air pollution’s role. To them a volcano IS mother nature's equivalent to SUV’s.

If you will notice this “theory” is once again based largely on computer models that they manipulated to get the results they wanted. The article starts off with, “the Little Ice Age began abruptly between A.D. 1275 and 1300, triggered by repeated, explosive volcanism and sustained by a self-perpetuating sea ice-ocean feedback system”. Then they get a little more specific, “the Little Ice Age was caused by an unusual, 50-year-long episode of four massive tropical volcanic eruptions.” Never mind that the previous statement said that the Little Ice Age began abruptly between A.D. 1275 and 1300 which is a 25 year period.

Then we learn that, “This is the first time anyone has clearly identified the specific onset of the cold times marking the start of the Little Ice Age,”. Umm, yeah right... I guess if you ignore textbooks written fifty years ago that might be true. Since they claim to be the first, I would like to know exactly which “four massive tropical volcanic eruptions” triggered The Little Ice Age.

Of course it gets back to, “Our simulations showed that the volcanic eruptions may have had a profound cooling effect”. I think that most people are aware that volcanic dust in the atmosphere does appear to have a cooling effect on the climate, however it is generally thought that this effect is short-lived because the excess dust generally settles out within a year or two at most. If you ignore the effects of gravity and precipitation in your computer models I suppose that this phenomena could be drawn out far longer than that.

“The team used the NCAR-based Community Climate System Model to test the effects of volcanic cooling on Arctic sea ice extent and mass.” I would be curious if the physical evidence for the massiveness and timing of the four tropical volcanoes is in the historical record or if the evidence is derived from the study’s own computer models. Given the past actions of these particular researchers I would guess that physical observations and evidence played a far smaller role than did the reliance on the all-knowing computer model.

[PIF]

1150 A.D. - Quilotoa, Ecuador Erupts; Volcanic Explosivity Index (VEI) = 6

1150 A.D. Little Ice Age (First Peak) Begins

1259 A.D. - Very large eruption, Origin Unknown. Twice the size of the Mt.Tambora eruption in 1815 A.D. - this would make a Volcanic Explosivity Index (VEI) = 8 or more; possibly qualifying as a Super Volcanic Eruption.

Antarctica ice core data; Norwegian tree rings; England and Europe - numerous references to dark skies and unseasonable cold, one obscure reference to pillar of fire in western sky; Chinese reference to pillar of fire in southern sky; Indonesian description - near Krakatau - magma rose in a miles wide column into the troposphere lasting for some days before subsiding, according to refferences.

1452 A.D. - Kuwae, Vanuatu, New Hebrides Arc Erupts; Volcanic Explosivity Index (VEI) = 6.

1460 A.D. - Little Ice Age (First Peak) Ends

[BrandtMichaels]

ping

[bert]

——there is little consensus———

It is clear to me that the onset caused massive disruption of human life in North America. The 1275 -1300 dating corresponds to the massive change in the South west and Cahokia.

The Anasazi moved from Aztec hundreds of miles south ti Paquim and split into the present Pueblo and Hopi settlements. Simultaneously, Cahokia fell apart and settlements south developed.

What ever it was that caused the chang turned human culture upside down and produced radical change in the way life was lived.

[blam]

Professor Mike Baillie's tree ring data indicate that there were worldwide cooling events at these dates:

* 3195BC

* 2354BC

* 1628BC (Exodus?)

* 1159BC

* 207BC

* 44BC

* 540AD (The Dark Ages)
(The Dark Ages: Were They Darker Than We Imagined?)

[ApplegateRanch]

Could, may have, estimates, might, AND and from sea ice climate model simulations AND the Little Ice Age likely would have occurred without decreased summer solar radiation at the time. “Estimates of the sun’s variability over time are getting smaller, it’s now thought by some scientists to have varied little more in the last millennia than during a standard 11-year solar cycle,” he said..

Lots of speculation; plenty of scientification, but very little, if any, science.

50-year-long episode of four massive tropical volcanic eruptions.

Which volcanoes, where? Curious minds would like to know.