UCSB geologist discovers pattern in Earth's long-term climate record

University of California - Santa Barbara ^ | Apr 6, 2010 | Unknown

[numberonepal]

http://www.halfpasthuman.com/MegaSunSpotCycle.pdf

[Reeses]

The soon to be unemployed researcher: Dr. Lorraine Lisiecki

[JustDoItAlways]

She would have had to recalculate the Milankovitch Cycle impacts to get the cycles or the Eccentricity of the Orbit to match up. [She might have though].

The two yellow lines on this chart are the Milankovitch Cycles - summer solar insolation at 75N and the less variable one is the temperature impact from the Eccentricity of the orbit - the more circular it is, the more solar energy received by the Earth in total - they are not in sync at all.

[SunkenCiv]

Thanks decimon.

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[SunkenCiv]

She discovered that the largest glacial cycles occurred during the weakest changes in the eccentricity of Earth's orbit -- and vice versa. She found that the stronger changes in the Earth's orbit correlated to weaker changes in climate. "This may mean that the Earth's climate has internal instability in addition to sensitivity to changes in the orbit," said Lisiecki.

IOW, she has run into the same problems as everyone else who has attempted to devise a uniformitarian model for "cycles" in the "ice ages".

[Rod Serling voice] Imagine if you will a path for the Earth in which it remains so cold during the summers (not just a few summers, but thousands of them) that the snow just accumulates, and yet the oceans continue to be warm enough to continue the hydrologic cycle and the snow continues to fall. You'll have to imagine it, because it literally can't happen, outside of the Land of the Midnight Sun Twilight Zone.

Antarctica is the dryest of the continents, the least precipitation, and I think also has the highest elevation -- and less than three million years ago supported temperate plant species. The Eltanin impact happened about two million years ago. Not a coincidence.

[skeptoid]

She concludes that the pattern of climate change over the past million years likely involves complicated interactions between different parts of the climate system, as well as three different orbital systems. The first two orbital systems are the orbit's eccentricity, and tilt. The third is "precession," or a change in the orientation of the rotation axis.

. . . and the forth complicated interaction between different parts of the system is:

[ROCKLOBSTER]

Well there.

Maybe now we can get some local 5-day forecasts that are worth a damn.

[decimon]

Maybe now we can get some local 5-day forecasts that are worth a damn.

They're not eccentric enough for you?

[I got the rope]

I found the paper

Links between eccentricity forcing and the 100,000-year glacial cycle

I'm not sure...but I think you are right.

[I got the rope]

ping...someone smarter than me needs to read this

[DBrow]

Nope, no mention.

[I got the rope]

She cited it as a reference

[SunkenCiv]

Hey, thanks! D/Led that one right away!

[SunkenCiv]

LOL!

[gigster]

Well, I could have told her that.

[gleeaikin]

Cycles probably exist, but we also have to consider catastrophes like megavolcanos and boloid strikes. Are any of them cyclic too?

[mbarker12474]

Daughter blames mother for global warming
By Dr. Paul Donohue
SPECIAL TO THE POST-DISPATCH
01/27/2010

Dear Dr. Donohue - My daughter complains that I flatulate more often than most individuals. Furthermore, she claims that the gas an individual passes contributes to global warming. I don’t know if I am physically able to keep my gas to myself to go green. Is my daughter really right?