Monday, November 06, 2006

Yes Virgina, there is no consensus on global warming

(Via Timebomb 2000.)

Or at least on the cause of it.

The Physical Evidence of Earth’s Unstoppable 1,500-Year Climate Cycle

From the Executive Summary:

The Earth currently is experiencing a warming trend, but there is scientific evidence that human activities have little to do with it. Instead, the warming seems to be part of a 1,500-year cycle (plus or minus 500 years) of moderate temperature swings.

It has long been accepted that the Earth has experienced climate cycles, most notably the 90,000-year Ice Age cycles. But in the past 20 years or so, modern science has discovered evidence that within those broad Ice Age cycles, the Earth also experiences 1,500-year warming-cooling cycles. The Earth has been in the Modern Warming portion of the current cycle since about 1850, following a Little Ice Age from about 1300 to 1850. It appears likely that warming will continue for some time into the future, perhaps 200 years or more, regardless of human activity.

Evidence of the global nature of the 1,500-year climate cycles includes very long-term proxies for temperature change — ice cores, seabed and lake sediments, and fossils of pollen grains and tiny sea creatures.


There are also shorter-term proxies — cave stalagmites, tree rings from trees both living and buried, boreholes and a wide variety of other temperature proxies. Scientists got the first unequivocal evidence of a continuing moderate natural climate cycle in the 1980s, when Willi Dansgaard of Denmark and Hans Oeschger of Switzerland first saw two mile-long ice cores from Greenland representing 250,000 years of Earth’s frozen, layered climate history. From their
initial examination, Dansgaard and Oeschger estimated the smaller temperature cycles at 2,550 years.
...

None of these pieces of evidence would be convincing in and of themselves. However, to dismiss the evidence of the 1,500-year climate cycle, it is necessary to dismiss not only the known human histories from the past 2,000 years but also an enormous range and variety of physical evidence found by a huge body of serious researchers.

You might want to put those plans on buying future ocean-front property in Denver on hold.

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