Do you have a link to that information?

http://www.msnbc.msn.com/id/48234493/ns/technology_and_science-science/

Go green, Save our darling Earth....

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.

This ikaite record qualitatively supports that both the Medieval Warm Period and Little Ice Age extended to the Antarctic Peninsula.

Cambridge, MA - A review of more than 200 climate studies led by researchers at the Harvard-Smithsonian Center for Astrophysics has determined that the 20th century is neither the warmest century nor the century with the most extreme weather of the past 1000 years. The review also confirmed that the Medieval Warm Period of 800 to 1300 A.D. and the Little Ice Age of 1300 to 1900 A.D. were worldwide phenomena not limited to the European and North American continents. While 20th century temperatures are much higher than in the Little Ice Age period, many parts of the world show the medieval warmth to be greater than that of the 20th century.

I am a geologist and geophysicist. I have a bachelor's degree in geology from Indiana University, and a Ph.D in geophysics from the University of Utah. My field of specialization in geophysics is temperature and heat flow.

In recent years, I have turned my studies to the history and philosophy of science. In 1995, I published a short paper in the academic journal Science. In that study, I reviewed how borehole temperature data recorded a warming of about one degree Celsius in North America over the last 100 to 150 years. The week the article appeared, I was contacted by a reporter for National Public Radio. He offered to interview me, but only if I would state that the warming was due to human activity. When I refused to do so, he hung up on me.

I had another interesting experience around the time my paper in Science was published. I received an astonishing email from a major researcher in the area of climate change. He said, "We have to get rid of the Medieval Warm Period."

The Medieval Warm Period (MWP) was a time of unusually warm weather that began around 1000 AD and persisted until a cold period known as the "Little Ice Age" took hold in the 14th century. Warmer climate brought a remarkable flowering of prosperity, knowledge, and art to Europe during the High Middle Ages.

The existence of the MWP had been recognized in the scientific literature for decades. But now it was a major embarrassment to those maintaining that the 20th century warming was truly anomalous. It had to be "gotten rid of."

In 1769, Joseph Priestley warned that scientists overly attached to a favorite hypothesis would not hesitate to "warp the whole course of nature." In 1999, Michael Mann and his colleagues published a reconstruction of past temperature in which the MWP simply vanished. This unique estimate became known as the "hockey stick," because of the shape of the temperature graph.

Normally in science, when you have a novel result that appears to overturn previous work, you have to demonstrate why the earlier work was wrong. But the work of Mann and his colleagues was initially accepted uncritically, even though it contradicted the results of more than 100 previous studies. Other researchers have since reaffirmed that the Medieval Warm Period was both warm and global in its extent.

There is an overwhelming bias today in the media regarding the issue of global warming. In the past two years, this bias has bloomed into an irrational hysteria. Every natural disaster that occurs is now linked with global warming, no matter how tenuous or impossible the connection. As a result, the public has become vastly misinformed on this and other environmental issues.

Earth's climate system is complex and poorly understood. But we do know that throughout human history, warmer temperatures have been associated with more stable climates and increased human health and prosperity. Colder temperatures have been correlated with climatic instability, famine, and increased human mortality.

The amount of climatic warming that has taken place in the past 150 years is poorly constrained, and its cause--human or natural--is unknown. There is no sound scientific basis for predicting future climate change with any degree of certainty. If the climate does warm, it is likely to be beneficial to humanity rather than harmful. In my opinion, it would be foolish to establish national energy policy on the basis of misinformation and irrational hysteria.

I'm building a large fan on the moon, then aiming it at the earth.

The iron idea isn't new. Years ago, when global warming was first being taken seriously, ideas of barges sprinkling iron in the oceans were considered. The problem with large scale tinkering with the chemistry of the oceans is that it can come back to bite you in ways unforeseen.

However, many of the predicted problems with global warming have and are happening. The National Academy of Sciences has proclaimed man made global warming "incontrovertible". Texas lost it's wheat crop last year. The US lost much of it's corn crop the last two years and is now in crisis. Many areas of the US are experiencing numerous record high temperatures almost every day.

There are those who say "big deal, the crops will just move!" The logistics of such a move are mind boggling, as many are learning now.

See what the prices of food have done in the last year.

http://www.csmonitor.com/Science/2012/0423/Corn-pricing-affected-by-global-warming-federal-mandates-not-helping-study-finds

http://www.cbsnews.com/2100-500395_162-20043737.html

i think your confusing greed with global warming...

The crop failures and all time heat records are not caused by greed.

ask monsanto about that... people seem to forget that weather patterns change all the time... fact is the earth as a whole has not went up in average temperature in over 20 years...the planet is not warming up, just different parts are... last year in Houston, we were at 110 degrees at this time, the past 2 weeks, it hasn't been above 90 degrees, and it has only been above 100 once so far this year... does that mean an ice age is coming?

Your "facts" are in error. The Earth is warming up as a whole. The oceans are maxing out their ability to moderate temp.

Would you care to support your claim with specific evidence?

It means that Houston has had a lot rain recently while the US is in a record heat wave. Your "facts" are in error. The Earth is warming up as a whole. The oceans are maxing out their ability to moderate temp.

i think we can agree to disagree on this...

Glad to ...

http://nas-sites.org/americasclimatechoices/new-resources-about-climate-change/

http://articles.latimes.com/2010/may/20/science/la-sci-climate-change-20100520-6

"Earlier this week, both the National Oceanic and Atmospheric Administration and NASA reported that 2009 was the warmest year worldwide in human history, reflecting the belief of most scientists that the situation will continue to worsen."

The amount of misinformation that is being spread is incredible. In general, the sources of misinformation appear to be oil companies who are trying to confuse the public that man made global warming is an "opinion" rather than the fact that it is.

Monsanto, the single most evil corporation in the history of the world, is out to control the food supply. Their involvement with global warming is only to sell corn to make fuel.

Many of the so called "experts" who have appeared to talk against global warming are paid by ExxonMobil.




from Wiki
http://en.wikipedia.org/wiki/Global_warming

I posted a lot of resources from NOAA, NASA, and the National Acadamy of Science that the Earth is heating up and most of it is caused by man.

What is your source that the Earth has not gone up in temp over the last 20 years? You also said Houston has only been above 100 once this year. It was 104 several times before I left on vacation last month. I live here too!