Posts Tagged ‘Medieval Warm Period’

Climate Deniers in Congress

April 30, 2013

It seems that Organizing for Action is going to shift to global warming/climate change/ climate chaos/ etc. after their embarrassing defeat on gun control.

David —

Right now, way too many lawmakers in Washington flat-out refuse to face the facts when it comes to climate change.

We’re never going to make real progress on this issue unless members of Congress get serious. Instead, some of them have made a habit of publicly mocking it.

We thought it was time to call them out for denying what’s basic science.

Watch this embarrassing video of climate deniers in Congress — and say you’re ready to help hold them accountable:

The science matters in this.

That’s the message way too many people in Washington need to hear right now.

In 2011, there were 240 members of Congress who voted to say that climate change is a hoax.

Most of them are still around today, and they’re getting away with it — some of them are actually proud of it. They think the whole debate is pretty funny.

If we want to make progress on climate change, we need everyone in Congress on board for a solution. It’s our job to show them there’s a price to pay for being a climate denier.

Take a look at this video and join the fight:

http://my.barackobama.com/Climate-Change

Get ready — more on this coming soon.

Thanks,

Jon

Jon Carson
Executive Director
Organizing for Action
@JonCarsonOFA

The use of the word “denier” is meant to suggest that questioning the hypothesis that the Earth is warmer due to man made carbon dioxide emissions and that drastic action involving increased government control of individual lives is necessary to combat this warming is equivalent to denying the historical fact of the Holocaust. It is a intellectually dishonest and despicable choice of wording and the use of “denier” is sufficient to indicate that the user does not have the facts on their side.

Here is the video. On the whole, I think it is only embarrassing for the people who made it. The politicians who are showcased actually seem to know what they are talking about, which is very odd.

Comments are disabled for the video on YouTube. I wonder why.

No the science is not overwhelming nor have the models that climate scientists have used turned out to be particularly accurate. The Earth is not currently warming to the extent they predicted. The Earth’s axial tilt does oscillate over time which does affect the climate, though what relation, if any, that long-term process has on recent shifts in climate, I do not know. The reference to the Vikings that the makers of this video found so humorous was probably a reference to the Medieval Warm Period, in which temperatures were probably somewhat higher than they are presently, at least in the Northern Hemisphere. During this period, the Vikings were able to colonize Greenland and even North America. When the climate became cooler in the thirteenth century, the Vikings were forced to abandon these colonies.

Mars’ ice caps seem to be melting. This is most likely a periodic phenomenon with no relation to events on Earth. Still, it would be very interesting and beneficial of we could get some idea how the temperatures have changed on other planets, especially Mars. It is certain that even insignificant changes in solar luminosity would have a far greater effect on the Earth’s climate than anything human beings could possibly do.

No, Mr. President. Hurricane Sandy, while devastating, was not unprecedented in size. There have been worse droughts in North America and droughts are a periodic phenomena, influenced by El Nino/La Nina more than our carbon emissions. When even the mainstream media is finally starting to admit that the world is not going to end, why does Organizing for Action feel they need to take action on this issue?

 

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The World Was Warmer

July 12, 2012
Dendrochronology

Dendrochronology (Photo credit: fdecomite)

I have been criticizing the Global Warming advocates of making exaggerated claims beyond what the data might warrant, but now I suppose I ought to take on the other side. I am referring to the article I read in the Daily Mail titled Tree-ring study Proves that Climate was Warmer. In fact, from what I read, the study does no such thing. You cannot, in fact, prove what the temperatures were a thousand years ago unless someone invents a time machine and takes thermometers into the past to measure them.

How did the Romans grow grapes in northern England? Perhaps because it was warmer than we thought.

A study suggests the Britain of 2,000 years ago experienced a lengthy period of hotter summers than today.

German researchers used data from tree rings – a key indicator of past climate – to claim the world has been on a ‘long-term cooling trend’ for two millennia until the global warming of the twentieth century.

This cooling was punctuated by a couple of warm spells.

These are the Medieval Warm Period, which is well known, but also a period during the toga-wearing Roman times when temperatures were apparently 1 deg C warmer than now.

They say the very warm period during the years 21 to 50AD has been underestimated by climate scientists.

Lead author Professor Dr Jan Esper of Johannes Gutenberg University in Mainz said: ‘We found that previous estimates of historical temperatures during the Roman era and the Middle Ages were too low.

‘This figure we calculated may not seem particularly significant, however it is not negligible when compared to global warming, which up to now has been less than 1 deg C.’

In general the scientists found a slow cooling of 0.6C over 2,000 years, which they attributed to changes in the Earth’s orbit which took it further away from the Sun.

The study is published in Nature Climate Change.

It is based on measurements stretching back to 138BC.

The finding may force scientists to rethink current theories of the impact of global warming

Professor Esper’s group at the Institute of Geography at JGU used tree-ring density measurements from sub-fossil pine trees originating from Finnish Lapland to produce a reconstruction reaching back to 138 BC.

In so doing, the researchers have been able for the first time to precisely demonstrate that the long-term trend over the past two millennia has been towards climatic cooling.

I suppose that I should take into consideration that this is an article intended for a popular audience on a newspaper’s website and I am sure the authors of this study were more nuanced in the papers they wrote. Still, a more accurate headline might read “Study based on assumptions on the relation of tree-rings to temperature and climate infers that Europe, and possible the entire world was warmer in the past”. But, maybe they would have trouble fitting all that in.

The study seems to be a very extensive one and considering that there are other lines of evidence that show a warmer Earth at these times, the Romans growing grapes in Britain and the Vikings being able to colonize Greenland and Vinland, I really don’t have any doubt that their conclusions are accurate. I would like to emphasize, however, how tentative any such studies actually are.

By the way, if the Earth really is in a long term trend toward cooler weather, should we be worried about a new ice age? As I have said before, I would be a lot more worried about global cooling than I would about global warming. After all, the glaciers weren’t that far north of where I am sitting during the last ice age.

 


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