Posted on 10/18/2001 7:36:43 AM PDT by callisto
I believe it shows that human activities have little or no effect on whether the earth goes through a cooling or warming cycle. These and other samples taken from ice sheets have shown that there have been period of cooling and warming for millions of years, and that the 'wobbling' of the earth on its axis accounts for the sometimes dramatic shifts from cool to warm.
I doubt very seriously though, that you will see this info on the Nightly News; it doesn't fit their view of the global warming story.
See also " Little heat on the prairie" Grasslands acclimatize to climate change.
Like evidence from cores below the seafloor in the North Atlantic, these segments suggest a transition from intense glaciations to a wide-scale glacial retreat may have taken less than 100 years."It should catch people's attention now since the change appears to occur in about a human lifespan," Krissek said.
This guy just signed his professional suicide note. What he is suggesting here is that rapidly retreating glaciers have occurred repeatedly throughout our geological history, and therefore are not indicative of any human influence on the atmosphere.
Grants will be pulled, hell be ostracized by his peers, his work will be trashed as junk science, and a grad student will accuse him of sexual harassment.
Hell be bartending to pay his mounting legal bills by the (warmer than normal due to US industry) spring.
An example of this could be Atlantic Coast hurricanes:according to a WSJ article that I read some years back,the hurricanes that hit the Atlantic shores run on a fairly predictable 20 year cycle. The things occur periodically,but you have to have good records for several hundred years to be able to see the pattern. Since most of the people who write articles on science for a popular audience have an attention span that is measurable in hours,at the most,this sort of observation seldom makes it into print,IMO. Let's don't even talk about the attention span of television reporters...
I read a science article about hurricanes that show a longer cycle. For example, 1,100 years ago the incident of category five hurricanes were much greater than today, etc.
Yup. I like your thinking.
Milankovitch Cycles and Glaciation
The episodic nature of the Earth's glacial and interglacial periods within the present Ice Age (the last couple of million years) have been caused primarily by cyclical changes in the Earth's circumnavigation of the Sun. Variations in the Earth's eccentricity, axial tilt, and precession comprise the three dominant cycles, collectively known as the Milankovitch Cycles for Milutin Milankovitch, the Serbian astronomer who is generally credited with calculating their magnitude. Taken in unison, variations in these three cycles creates alterations in the seasonality of solar radiation reaching the Earth's surface. These times of increased or decreased solar radiation directly influence the Earth's climate system, thus impacting the advance and retreat of Earth's glaciers.
It is of primary importance to explain that climate change, and subsequent periods of glaciation, resulting from the following three variables is not due to the total amount of solar energy reaching Earth. The three Milankovitch Cycles impact the seasonality and location of solar energy around the Earth, thus impacting contrasts between the seasons.
I'd post it here, but the graphics total about 70K, and I don't want to bog down the thread.
It's based on Just Enough believable fact to keep your level of skepticism of "official" environmental information high!
A FUN Read!
I HOPE you're not prone to "Nightmares!"
Doc
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