Climate Reconstruction Shows Long Term Cooling Trend

Climate in northern Europe reconstructed for the past 2,000 years: Cooling trend calculated precisely for the first time

Calculations prepared by Mainz scientists will also influence the way current climate change is perceived / Publication of results in Nature Climate Change

An international team including scientists from Johannes Gutenberg University Mainz (JGU) has published a reconstruction of the climate in northern Europe over the last 2,000 years based on the information provided by tree-rings. Professor Dr. Jan 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. "We found that previous estimates of historical temperatures during the Roman era and the Middle Ages were too low," says Esper. "Such findings are also significant with regard to climate policy, as they will influence the way today's climate changes are seen in context of historical warm periods." The new study has been published in the journal Nature Climate Change.

Was the climate during Roman and Medieval times warmer than today? And why are these earlier warm periods important when assessing the global climate changes we are experiencing today? The discipline of paleoclimatology attempts to answer such questions. Scientists analyze indirect evidence of climate variability, such as ice cores and ocean sediments, and so reconstruct the climate of the past. The annual growth rings in trees are the most important witnesses over the past 1,000 to 2,000 years as they indicate how warm and cool past climate conditions were.

Researchers from Germany, Finland, Scotland, and Switzerland examined tree-ring density profiles in trees from Finnish Lapland. In this cold environment, trees often collapse into one of the numerous lakes, where they remain well preserved for thousands of years.

The international research team used these density measurements from sub-fossil pine trees in northern Scandinavia to create a sequence reaching back to 138 BC. The density measurements correlate closely with the summer temperatures in this area on the edge of the Nordic taiga. The researchers were thus able to create a temperature reconstruction of unprecedented quality. The reconstruction provides a high-resolution representation of temperature patterns in the Roman and Medieval Warm periods, but also shows the cold phases that occurred during the Migration Period and the later Little Ice Age.

In addition to the cold and warm phases, the new climate curve also exhibits a phenomenon that was not expected in this form. For the first time, researchers have now been able to use the data derived from tree-rings to precisely calculate a much longer-term cooling trend that has been playing out over the past 2,000 years. Their findings demonstrate that this trend involves a cooling of -0.3°C per millennium due to gradual changes to the position of the sun and an increase in the distance between the Earth and the sun.

"This figure we calculated may not seem particularly significant," says Esper. "However, it is also not negligible when compared to global warming, which up to now has been less than 1°C. Our results suggest that the large-scale climate reconstruction shown by the Intergovernmental Panel on Climate Change (IPCC) likely underestimate this long-term cooling trend over the past few millennia."

Global Warming .... Make that Cooling

Call me crazy, call me stupid, but this doesn't make any sense. According to the U.S Government The Climate has been on a cooling trend over the past 10 years.

The Global Warming Alarmist, are all saying that Carbon output is causing Global Warming, and yet in the past 10 years, worldwide Carbon emissions keep rising, as a matter of fact, China alone has added 2 Coal Fired Power plants every single week over the past decade, and that doesn't even include their Oil burning and Gas burning ones that they've added. As a matter of fact, they don't even apply the same stringent environmental controls to their plants that the U.S.A. uses, so their pollution output is significantly higher than the same plants built in the U.S. And yet, we still have had a global cooling trend in the past couple of years. What gives? Maybe this is the reason why the World Bank is trying to siphon off dollars meant to reduce Carbon output, because they know that it really doesn't make and difference and this is all about money.

In the mean time, food prices are still going through the roof, all around the world the poor are the hardest hit. We're doing this supposedly to reduce Carbon output because, we're told it causes Global warming? Clearly, this is not the case. Congress has done nothing but block efforts to increase Oil and Gas production and we're paying through the nose, all for what? To reduce Carbon Output to save the world? Carbon has gone up by MASSIVE amounts, and yet the planet is still cooling!

I've said it before Congress needs to show us they care, but it seems that they're too beholden to the special interest groups, like the Sierra Club and others, to look at straight up FACTS. This information comes from a the government agency that monitors the climate, not some right wing conspiracy group, so what is the problem?
We need to make it clear to congress that we mean business. They need to start Drilling, NOW. We need those Shale to Oil converters running NOW. We need the Coal to Oil Gasification NOW. And if we don't get it, they will be out of a job (right along with the rest of us, since we won't be able to afford to gas it takes to go to work).

One of the best ways to let congress know is by participating in Operation Drill Bit.