There’s a reason so many people value archives and why we should all support archaeology aside from the Indiana Jones factor. Every now and then, the combined historical record corrects the hysterical claims of modern humans who are trying to get nations to bankrupt themselves on the altar of environmentalism. Such may well be the case with the publication of a paper in the journal Nature spearheaded by Fredrik Ljungqvist of Stockholm University who studied Viking, Chinese and other historic records for clues on what the earth’s climate was like during the raiding centuries of the past millennium.
The researchers reconstructed changes in water availability by statistically analysing evidence for changes in precipitation and drought. To do this the researchers compiled hundreds of records of precipitation change across the Northern Hemisphere from archives including tree-rings, speleothems, lake sediments, and historical records. This is the first hemispheric-scale assessment of how a key societal resource — water availability — has fluctuated over the past twelve centuries.
To investigate the links between temperature and precipitation variations, the researchers compared their reconstructed precipitation variations with a temperature reconstruction which also was developed by the team. They conclude that it is possible to see clear correlations between variations in temperature and precipitation only in a few specific regions. For instance, during both the relatively warm twelfth century, and the relatively cold fifteenth century, drought was observed to be most widespread in the Northern Hemisphere.
“The study shows the importance of placing recent precipitation changes in a millennium-long perspective. Actual measurements of precipitation are too short to tell if the observed changes today fall outside the range of natural variability. Instrumental measurements are also too short to test the ability of state-of-the-art climate models to predict which regions of the hemisphere will get drier, or wetter, with global warming,” says Charpentier Ljungqvist.
Or, in non-fifty cent word speak, now that we know rainfall has no distinct pattern relating to heat or cold, keep up with the global warming rhetoric just in case. After all, we’ve only been keeping records for less than 2,000 years of this planet’s however many billion year history, so we really don’t know if today’s weather is normal or not.
What this DOES prove, though, is that the climate models as written into the global warming prediction software are wrong. Despite the claims that the 20th century was one of the warmest on record, there does not seem to be any rhyme or reason to the weather outside of solar activity, and shifts in the earth’s axis while in orbit, which is supposedly the cause of ice ages. From Reuters:
The 10th century, when the Vikings were carrying out raids across Europe and the Song dynasty took power in China, was the wettest in the records ahead of the 20th, according to the researchers in Sweden, Germany, Greece and Switzerland.
And the warm 12th century and the cool 15th centuries, for instance, were the driest, according to the report, based on 196 climate records. Variations in the sun’s output were among factors driving natural shifts in the climate in past centuries.
So, how culpable is man and industrial activity in global warming? The jury is out for now even if the climate consortium is still hedging its bets and preaching for us to return to living as one would have in centuries past, as if that will restore the weather the way it was back then.