Antarctic Seafloor Core Suggests Earth's Orbital Oscillations May Be The Key To What Controlled Ice

Ohio State University ^ | October 17, 2001

[callisto]

somehow I lost the word "AGES" at the end of the title above. Sorry.

[blam]

Good report, thanks. More support for the Milankovitch theory, which I believe.

[Rustynailww]

how does this relate to global warming theroies?

[Junior]

Bump.

[callisto]

In the future science will probably realize that global warming is just the "effect" from the conjunction of these various cycles.An effect that repeats itself in a planetary supercycle every billions of years or so.

[Eric in the Ozarks]

Correct. No reason to worry. SUV's are not killing us off. Its GOING TO BE O K !

[SuziQ]

how does this relate to global warming theroies?

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.

[Nebullis]

Good find.

See also " Little heat on the prairie" Grasslands acclimatize to climate change.

[dead]

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, he’ll be ostracized by his peers, his work will be trashed as junk science, and a grad student will accuse him of sexual harassment.

He’ll be bartending to pay his mounting legal bills by the (“warmer than normal due to US industry”) spring.

[callisto]

it's often said that the TRUTH HURTS.

[sawsalimb]

I've thought for some years that what is being cried up as "global warming!!!-quick,we have to turn off the peasants' air conditioners!!!!"is,if it exists at all,simply part of a cyclical weather pattern that happens on a timescale that is long enough for us puny humans not to recognize.

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...

[blam]

"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.

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.

[sawsalimb]

if I recall correctly,the article that I read claimed that the hurricanes in the Atlantic were driven by rainfall in one of the African deserts(the Sahel,maybe?-can't remember for certain),and that particular rainfall pattern had historically gone through a 20 year cycle of ups and downs. A 1000 year cycle wouldn't surprise me either,and in fact,I'd be more surprised to find out that one didn't exist,than to find out that one did.

[blam]

"A 1000 year cycle wouldn't surprise me either,and in fact,I'd be more surprised to find out that one didn't exist,than to find out that one did."

Yup. I like your thinking.

[StopGlobalWhining]

Some more information on Milankovitch cycles:

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.

[StopGlobalWhining]

A good link explaining Milankovich's theory is at the University of Montana: http://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htm.

I'd post it here, but the graphics total about 70K, and I don't want to bog down the thread.

[blam]

Thanks.

[Doc On The Bay]

You ought to "check out" a novel called "The HAB Theory," written in, I believe, the mid-seventies.

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

[SunkenCiv]

Note: this topic was posted October 2001.

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