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To: elmatador who wrote (2283)11/20/2005 5:21:11 PM
From: Maurice Winn  Read Replies (1) | Respond to of 219600
 
<the only way to cool or warm this thing here is to shift the inclination of the axis of the Earth so that the amount of that heat would focus more in the Equator and ice would pile up in the higher latitudes in a phenomenon called glaciation!!!>

ElM, Earth is a monster spinning top and as you know, tops stay on their axis, other than a bit of wobble and if they are crooked there's some gyroscopic precession.

I hope you aren't suggesting we straighten it up? That would be difficult.

Here is some good information on Earth's precession etc: en.wikipedia.org

<Precession of the equinoxes
The Earth goes through one complete precession cycle in a period of approximately 25,800 years, during which the positions of stars as measured in the equatorial coordinate system will slowly change; the change is actually due to the change of the coordinates. Over this cycle the Earth's north axial pole moves from where it is now, within 1° of Polaris, in a circle around the ecliptic pole, with an angular radius of 23 degrees 27 arcminutes [1], or about 23.5 degrees. The shift is 1 degree in 180 years (the angle is taken from the observer, not from the center of the circle).

The explanation of this is: The axis of the Earth undergoes precession due to a combination of the Earth's nonspherical shape (it is an oblate spheroid, bulging outward at the equator) and the gravitational tidal forces of the Moon and Sun applying torque as they attempt to pull the equatorial bulge into the plane of the ecliptic.
>

I am thinking of climate control on a scale of decades rather than millennia. We could plunge into an ice age in 3 years. We have probably avoided that thanks to the increasing CO2, but to be on the safe side, we should double the CO2 levels if we can. That will make plants really happy too.

I don't think we can double CO2 levels though because it's like filling a leaky bucket. The deeper the water, the higher the pressure and the faster the leak, until it's going out as fast as we pour it in.

Mqurice



To: elmatador who wrote (2283)11/21/2005 3:19:43 PM
From: Maurice Winn  Read Replies (1) | Respond to of 219600
 
<I thought that heat in the Earth came from a nearby start. And the only way to cool or warm this thing here is to shift the inclination of the axis of the Earth >

ElM, you are right that most of the heat comes from the sun, but Earth is VERY hot inside and that heat comes out and has to be disposed of.

You have ignored reflectivity and insulation.

If Earth is white with snow and cloud, then much of the sun's heat is reflected back out.

If CO2 is thick, the heat comes in and doesn't get out.

Mucking about with the axis of Earth won't change the incident sunlight, just the distribution.

By producing lots of CO2, we can keep the place warm and avoid snow and cloud reflection. But we have to be careful we don't create lots of desert, because that's reflective and green is absorbing. Too much desert = ice age too.

Mqurice