Monday, May 1, 2017

IRON  AGE  CLIMATE: GRAPES  OF  WRATH FOR  THE  MWP?

It's  a  good wine, but  not  a  Geat wine

Were  the  Dark Ages really  that much  cooler than  the  Medieval Warm Period , or did   Beowulf's crew of  Geats  row south  for  a drink  more  heroic  than mead ? 
Archaeologists have a new theory about what went into the only brew for the brave and true served at King Hrothgar's far-famed Heorot Hall

While medieval records show Viking settlers found it impossible to grow  grapes in  Greenland or  Iceland-  in 1237,  Pope  Gregory IX   told  the Norse colonies to  stop  consecrating  local maleshifts like crowberry juice   for mass, and import the real deal  in  communion wine - vini de uvis - from  parts  South,  new   mass  spectrographic strontium  isotope  studies in  The Danish Journal of Archaeology -- Iron  and Viking Age  grapes  from  Denmark–vine seeds  found at the royal complexes by Lake Tissø suggest a dynasty of sword-Danes made its mead-halls all the merrier by cultivating wine grapes.

Peter Steen Henriksen and Sandie Holst of the National Museum of Denmark and Karin Frei of Museum Vestsjællandand report that in Denmark, (due East of Fife, the site of the northernmost vineyard in Scotland today)  thousands of ancient grape pips, some radiocarbon dated  to  the  late  Iron  Age ,  and  others  to  the  age  of  Viking discovery,  have come to scientific light  in  archaeological  digs on the  main  Danish island of Zealand. The grape pips show a  87Sr / 86Sr ratio of 0.71091 (±0.00004; 2σ), within  Denmark’s strontium isotopic baseline range, indicating the seeds could be of local origin.  
Similar stable Sr isotope ratios exist in Cretaceous Mediterranean  terranes, but  before  they  invoke raisin-crazed berserkers to bolster anecdotal views of  the  MWP,  WUWT climate bores should try to  make  sense  of  the new radiocarbon dates: the Tissø Iron-age pips grew centuries before the Norse hit Normandy let alone sailed to Sicily and back, so the local press sensibly reports:    
                              Danish Vikings 'may have made their own wine' 

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Danish Vikings 'may have made their own wine'
Photos: Iris
New research suggests the Vikings indulged in a bit of viticulture.
Studies of grape pips point to wine production in Denmark during the time of the Vikings.
The Vikings liked alcohol, but while it is easy enough to grow crops and produce beer in the Danish climate, wine is a different challenge and was thought to have always been imported from southern parts of Europe to northern countries.
But new research has showed that at least one of the two oldest grape cores found in Denmark was grown locally, reports science news site Videnskab.dk.
Results of the analysis could be the final piece of evidence needed to prove that wine was produced in Denmark during the Viking era, says the report.
 “This is the first discovery and sign of wine production in Denmark, with all that that entails in terms of status and power. We do not know how [the grapes] were used – it may have been just to have a pretty bunch of grapes decorating a table, for example – but it is reasonable to believe that they made wine,” archaeological botanist and museum curator Peter Steen Henriksen of Denmark’s National Museum told Videnskab.dk.

Henriksen himself discovered the two centuries-old wine pips in a sample of earth at the site of a Viking settlement at Tissø. Analysis of the pips found one to date from the Viking era and the other from the Iron Age.

No evidence of grapes in Denmark prior to the Middle Ages was previously known.
Henriksen sent the pips to the National Museum, where they underwent strontium isotope tests similar to those that confirmed Danish preserved bodies the Skydstrup girl and the Egtved girl originated from geographical areas further south in Europe.
The tests showed that the Viking era grape was probably grown on Zealand, reports Videnskab.dk.
“Before we only had suspicions, but now we can see that they actually had grapes and therefore the resources to produce [wine] themselves. Suddenly it all becomes very real,” professor Karin Margarita Frei of the National Museum told Videnskab.dk.
The Tissø settlement is one of the richest Viking locations in Denmark and was home to a dynasty that stretched from the early Iron Age to the late Viking period, reports Videnskab.
Production of wine in the area may have been a way of expressing status, say researchers.

Although it is also possible that the grapes were grown to be consumed as fruit, the Vikings are known to have come across wine on their voyages abroad, and Roman wine cups and other remnants of wine have been found in Scandinavia. The climate in the region was also similar to the present-day climate, making it possible to grow grapes.