K Ludger wrote:

The earth is NOT a closed-loop system.




WTF? Of course it is.

Look up into the sky during a cloudless day. Observe large ball of
light pumping energy into the Earth's ecosystem.

David

"David R.Birch" wrote in message
...
K Ludger wrote:

The earth is NOT a closed-loop system.




WTF? Of course it is.

Look up into the sky during a cloudless day. Observe large ball of light
pumping energy into the Earth's ecosystem.

David


Closed-loop infers the system has feedback - which it does.

Sure - the sun is an energy source feeding into the system but that does not
make it a system without feedback. The sun is akin to a power supply driving
any kind of electronic/electromechanical control system.

In article , "K Ludger" wrote:

"David R.Birch" wrote in message
...
K Ludger wrote:

The earth is NOT a closed-loop system.




WTF? Of course it is.

Look up into the sky during a cloudless day. Observe large ball of light
pumping energy into the Earth's ecosystem.

David


Closed-loop infers the system has feedback - which it does.

Sure - the sun is an energy source feeding into the system but that does not
make it a system without feedback. The sun is akin to a power supply driving
any kind of electronic/electromechanical control system.

Interesting concept. Please describe the feedback mechanism by which the earth
regulates the amount of energy the sun provides to it.

On 2009-02-16, Doug Miller wrote:
In article , "K Ludger" wrote:

"David R.Birch" wrote in message
...
K Ludger wrote:

The earth is NOT a closed-loop system.




WTF? Of course it is.

Look up into the sky during a cloudless day. Observe large ball of light
pumping energy into the Earth's ecosystem.

David


Closed-loop infers the system has feedback - which it does.

Sure - the sun is an energy source feeding into the system but that does not
make it a system without feedback. The sun is akin to a power supply driving
any kind of electronic/electromechanical control system.

Interesting concept. Please describe the feedback mechanism by which the earth
regulates the amount of energy the sun provides to it.

Cloud albedo (reflectivity). The more cloud cover, the less
energy makes it to the surface.

Enjoy,
DoN.

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On Feb 16, 11:32*pm, "DoN. Nichols" wrote:

Interesting concept. Please describe the feedback mechanism by which the earth
regulates the amount of energy the sun provides to it.

* * * * Cloud albedo (reflectivity). *The more cloud cover, the less
energy makes it to the surface.
* * * * * * * * DoN.

Likewise snow. The radiation temperature of space, the night sky, is
about -230C. That's where all the heat of the day goes on a clear
night, and why the sun doesn't keep making Earth hotter. The sun warms
the earth by 200 to nearly 300 degrees, so a fraction of a percent of
change in absorption or radiation can make a large difference.