Longest Orbital Cycles Proven and Measured; Half-Billion Year Super-Milankowitch Cycles


Alex Wierbinski's picture

By Alex Wierbinski - Posted on 07 March 2019

 

Update
What Caused an Ice Age Expansion from 40 to 100 Thousand Years,
“Despite Orbitally Paced Drivers?”

A Gradually Precessing Elliptical Orbit
A gradually precessing elliptical orbit, WillowW, Wiki.
Thanks to WillowW, Wiki
 

Original Research

NATURALLY CHANGING CLIMATE CYCLES
Longest Orbital Cycles Proven and Measured

Super-Milankowitch Cycles a Half-Billion Years Long

In ancient rocks, scientists see a climate cycle working across deep time,
The Earth Institute at Columbia University, May 7, 2018.

 MAIN POINTS

"Scientists have for decades posited that Earth's orbit around the sun goes from nearly circular to about 5 percent elliptical, and back again every 405,000 years."

"...documented a gradual shift in Earth's orbit that repeats regularly every 405,000 years, playing a role in natural climate swings."

"...the cycle has been stable for hundreds of millions of years, from before the rise of dinosaurs, and is still active today."

 

WHAT IT IS
"The shift is believed to result from a complex interplay with the gravitational influences of Venus and Jupiter, along with other bodies in the Solar System as they all whirl around the Sun like a set of gyrating hula-hoops, sometimes closer to one another, sometimes further. Astrophysicists believe the mathematical calculation of the cycle is reliable back to around 50 million years, but after that, the problem gets too complex, because too many shifting motions are at play."

"The planetary motions that spur climate swings are known as Milankovitch cycles, named for the Serbian mathematician who worked them out in the 1920s. Boiled down to simplest terms, they consist of a 100,000-year cycle in the eccentricity of Earth's orbit, similar to the big 405,000-year swing; a 41,000-year cycle in the tilt of Earth's axis relative to its orbit around the Sun; and a 21,000-year cycle caused by a wobble of the planet's axis. Together, these shifts change the proportions of solar energy reaching the Northern Hemisphere, where most of the planet's land is located, during different parts of the year. This in turn influences climate."

 

WHAT IT DOES
"...the 405,000-year interval indeed exerts a kind of master control over climate swings. Paleontologist Paul Olsen, a coauthor of the study, said that the cycle does not directly change climate; rather it intensifies or dampens the effects of shorter-term cycles, which act more directly."

 

KNOWN INFLUENCES
"In the 1970s, scientists showed that that Milankovitch cycles have driven repeated warming and cooling of the planet, and thus the waxing and waning of ice ages over the last few million years."

"...every 405,000 years, when orbital eccentricity is at its peak, seasonal differences caused by shorter cycles will become more intense; summers are hotter and winters colder; dry times drier, wet times wetter. The opposite will be true 202,500 years later, when the orbit is at its most circular."

 

THIS RESEARCH
The paper, "Empirical evidence for stability of the 405 kyr Jupiter-Venus eccentricity cycle over hundreds of millions of years," is,
"a significant new contribution to geology, and to astronomy."

A TWOFER!

 

Bottom Line

What we can see here is a complex interplay between our star, our planet, and the rest of the planets orbiting our star, producing a 400,000 year cycle of orbital eccentricity that alternatively warms and cools our planet.

Between these grand forces lays our oceans and atmosphere, which contain within themselves the living ability to alter the distribution of carbon in both. The forces of life can move massive amounts of carbon and oxygen through the various parts of its system, to regulate temperatures within the broader limits imposed by the orbital cycles.

Living things have played a crucial role in determining the composition of our atmosphere since the beginning of life on this planet. It would be a shame if living things play the leading role in making this atmosphere inhospitable to complex life.

 

Technology News. The Bottom Line: Escape from the Tech Trap

 

 

Updated

 

Direct to Research Notice:

1.5 Million Years Ago:
Ice Age Expansion from 40 to 100 Thousand Years

Despite Orbitally Paced Drivers”

What triggered the 100,000-year Ice Age cycle?
American Association for the Advancement of Science, March 7, 2019.

MAIN POINTS

"A slowing of ocean circulation in the waters surrounding Antarctica drastically altered the strength and more than doubled the length of global ice ages following the mid-Pleistocene transition."

 

The Southern Engine of Ocean Circulation

Antarctic Ocean Circulation Video

Not Just Circulation, but O2 Distribution is also changing:

 

Related?

Where Has All the Heat Gone? Into Changing the Circulation of the Deep Blue Sea...

Deep Ocean Currents Are Liquid Time Capsules

 

 

Jan 2019

Potential Confluence of Grand Orbital Cycles with Human Ignorance could End Antarctic Ice

 

A New Contender for Long Term Climate Influences: The Tropics?

May 24, 2018

PLANETARY ECOLOGICAL FRAMEWORK

Equatorial Activity and Milankovitch Running the Ice Ages?

A Complex Tapestry of Life and Energy Interacting?

 

 

No More Ice Ages

Amazing Ancient Human Climate Interactions

 

 

 

Eco-Crash News

 

 

 

May 2018 News of Man & Nature

 

 

 

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super Milankowitch cycles found in geological record

 

Originally Published
2018-05-08 20:41:42

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