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Posted on 09/03/2009 5:15:51 PM PDT by nickcarraway
Arctic temperatures are now higher than at any time in the last 2,000 years, research reveals.
Changes to the Earth's orbit drove centuries of cooling, but temperatures rose fast in the last 100 years as human greenhouse gas emissions rose.
Scientists took evidence from ice cores, tree rings and lake sediments.
Writing in the journal Science, they say this confirms that the Arctic is very sensitive both to changes in solar heating and to greenhouse warming.
The 23 sites sampled were good enough to provide a decade-by-decade picture of temperatures across the region.
The result is a "hockey stick"-like curve in which the last decade - 1998-2008 - stands out as the warmest in the entire series.
"The most pervasive signal in the reconstruction, the most prominent trend, is the overall cooling that took place for the first 1,900 years [of the record]," said study leader Darrell Kaufman from Northern Arizona University in Flagstaff, US.
"The 20th Century stands out in strong contrast to the cooling that should have continued. The last half-century was the warmest of the 2,000-year temperature record, and the last 10 years have been especially dramatic," he told BBC News.
On average, the region cooled at a rate of 0.2C per millennium until about 1900. Since then, it has warmed by about 1.2C.
Much debate on climate change has centred on the Mediaeval Warm Period, or Mediaeval Climate Anomaly - a period about 1,000 years ago when, historical records suggest, Vikings colonised Greenland and may have grown grapes in Newfoundland.
The new analysis shows that temperatures were indeed warmer in this region 1,000 years ago than they were 100 years ago - but not as warm as they are now, or 1,000 years previously.
(Excerpt) Read more at news.bbc.co.uk ...
Because 2,000 years ago we had SUVs running around the planet and big scary factories.
The use of tree rings completely invalidates the study. The technique has been shown to be fatally flawed. No further analysis or argument necessary.
(Besides that... I bet when Marco Polo in 1290 was able to sail through the Bering Strait all the way past Hudson Bay in the Arctic there is some minor reason to believe that it was warmer then... Oh, but these people don’t believe in the Medieval Warm Period in Europe despite the wine grapes being grown in Ireland at the time...)
Now, about the "researcher", if you read the news report closely you will observe that he has rejected the Sun as a source of heat.
The man is certifiably mad.
I remember seeing 5000 Greenland Vikings growing crops and tending to sheep and sneaking off to America to pillage the Iroquois just last week.
It’s been so warm.
Baltimore Maryland, August 31
58 degrees
Funny they can pinpoint the exact temperatures in the region for every year for the last 2,000 years and can declare with absolute certainty that at no point in the past 2,000 years was there a maximum above the current temperatures, and that they can do so to a tenth of a degree.
I smell Hocus Pocus, or something closely approximating magic but definitely derived from a pile of manure.
Oh. I wasn’t aware that they were taking temperature readings 2000 years ago. Or 200 for that matter - in the arctic...
More BS
Quick - where’s that “Oh no, not that $hit again?”?
These environmentalist whack jobs are total Bozos.
I can see being advocates of not polluting the water table we drink from, but the rest is pretty much BS.
Also note that the Antarctica ice growth this winter in the southern hemisphere is higher than last year and higher than the average of 1979-2000.
If it’s shaped like a hockey stick, there are two forces at work:1) the answer is known and you have to work backwards to the basic data; and 2)you really have no clue to what’s happening and so you make this up as you go along.
In Marco Polo’s “Book of Travels” he states that he traveled north (by compass) until he reached a place where the Pole Star appeared in the south (by compass).
The Pole star actually IS over the North Pole (within a degree or so). Take a look at a map that has North Pole and Magnetic North Pole depicted... and see how it is possible that his statement is true, instead of baffling, as it was to him.
Then why is there (a lot) more ice in the Arctic now than there was 2 years ago?
Then why is there (a lot) more ice in the Arctic now than there was 2 years ago?
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