A refresher on Global Cooling. errrr Global Warming - Page 2 - Mercedes-Benz Forum

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post #11 of 68 (permalink) Old 04-03-2006, 09:23 PM
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RE: A refresher on Global Cooling. errrr Global Warming

Isn't climate change part of the earths own natural cycle and we are just speeding it up? Because arn't certain period of history such as ht edark ages meant to coincide with a cooling of hte planet? I'm sure I read that somewhere.
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post #12 of 68 (permalink) Old 04-03-2006, 10:05 PM
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RE: A refresher on Global Cooling. errrr Global Warming

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NZ Benz - 4/3/2006 11:23 PM

Isn't climate change part of the earths own natural cycle and we are just speeding it up? Because arn't certain period of history such as ht edark ages meant to coincide with a cooling of hte planet? I'm sure I read that somewhere.
Yes, that's part of the story. But like the difference between any good novel and real life, there is a heck of a lot to this climate stuff than an apparent correlation with this or that bit over this or that time period.

Here's an excellent place to start. http://www.usgcrp.gov/

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post #13 of 68 (permalink) Old 04-03-2006, 10:11 PM
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RE: A refresher on Global Cooling. errrr Global Warming

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NZ Benz - 4/3/2006 11:23 PM

Isn't climate change part of the earths own natural cycle and we are just speeding it up? Because arn't certain period of history such as ht edark ages meant to coincide with a cooling of hte planet? I'm sure I read that somewhere.
Sure there are cycles, but our ecosystem has been in rythm with them for an eternity. The real question is whether or not we are speeding things up to the point cataclysmic change can result - each epoch of earth history is separated by cataclysmic events, two of which almost wiped out all of the life on this planet, the causes of which are little understood even now. We are already forcing a mass extinction almost as great as the one that saw the dinosaurs disappear.

Recall that earlier generations faced down fascism and communism not just with missiles and tanks, but with sturdy alliances and enduring convictions. They understood that our power alone cannot protect us, nor does it entitle us to do as we please. Instead, they knew that our power grows through its prudent use; our security emanates from the justness of our cause, the force of our example, the tempering qualities of humility and restraint.

-President Barack Obama, 1st Inaugural address
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post #14 of 68 (permalink) Old 04-03-2006, 10:41 PM
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RE: A refresher on Global Cooling. errrr Global Warming

We are not speeding anything up that's all hagwash. Beside if this true our government will have been building shelters for us so we can take over the world after all of the foreigners are dead.
post #15 of 68 (permalink) Old 04-03-2006, 10:54 PM
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RE: A refresher on Global Cooling. errrr Global Warming

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GMISBEST. - 4/4/2006 12:41 AM

We are not speeding anything up that's all hagwash. Beside if this true our government will have been building shelters for us so we can take over the world after all of the foreigners are dead.
Wank, Wank, Wank, Hear that? It's the sound of climate change masti.

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post #16 of 68 (permalink) Old 04-04-2006, 12:58 AM
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RE: A refresher on Global Cooling. errrr Global Warming

As my favorite bumper sticker says "Ignore the environment and maybe it will go away"
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post #17 of 68 (permalink) Old 04-04-2006, 02:39 AM
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RE: A refresher on Global Cooling. errrr Global Warming

Maybe someone has it?.
I've always wanted to see a perspective illustration that shows just how thin a band the average ocean bottoms and atmosphere are in relation to a sea level indicator over an (obviously) small segment of the Earths crust).
3-4km ocean depth is but a short walk equivalent, as is reaching thin air at 35,000ft.
This small sandwich layer is what we depend upon for base level existence.
Filling it up with shit can't be a good thing - nevermind the arguing over tolerances.
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post #18 of 68 (permalink) Old 04-04-2006, 06:51 AM
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RE: A refresher on Global Cooling. errrr Global Warming

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shrimpton - 4/4/2006 4:39 AM

Maybe someone has it?.
I've always wanted to see a perspective illustration that shows just how thin a band the average ocean bottoms and atmosphere are in relation to a sea level indicator over an (obviously) small segment of the Earths crust).
3-4km ocean depth is but a short walk equivalent, as is reaching thin air at 35,000ft.
This small sandwich layer is what we depend upon for base level existence.
Filling it up with shit can't be a good thing - nevermind the arguing over tolerances.
I took a geology course eons ago in which the prof said that his discipline studied the rocky stuff that lies beneath the thin, greasy surface.
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post #19 of 68 (permalink) Old 04-04-2006, 10:52 AM
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RE: A refresher on Global Cooling. errrr Global Warming

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shrimpton - 4/4/2006 4:39 AM

.....nevermind the arguing over tolerances.
That is where a lot of the science now is aimed at. Our climate is global, and the mass of air etc can seem immoveable, but the feedback loops can be delicate, and we have no idea of how robust or delicate they really are.

For example, Venus is similar to size and early atmosphere to early earth, yet it is now 800 degrees or something - earth obviously is not.

Currents such as the gulf stream have immense impact on weather. And there is no "law" that says these currents will always be in the same place.

So in a "what if" scenario, a certain amount of northern ice melts (they already predict that the northwest passage is going to open up) the gulf stream makes a relatively small "path of least resistance" change in its path. We have no idea the long term effects.

And if we don't understand the tloerances, there will always be opposing arguments, even using the same data
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post #20 of 68 (permalink) Old 04-04-2006, 12:15 PM
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RE: A refresher on Global Cooling. errrr Global Warming

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Misfit - 4/4/2006 12:52 PM

Quote:
shrimpton - 4/4/2006 4:39 AM

.....nevermind the arguing over tolerances.

For example, Venus is similar to size and early atmosphere to early earth, yet it is now 800 degrees or something - earth obviously is not.
Its also millions of miles closer to the sun. Although it may be an extreme example greenhouse gases as well:

Astronomers refer to Venus as Earth's sister planet. Both are similar in size, mass, density and volume. Both formed about the same time and condensed out of the same nebula. However, during the last few years scientists have found that the kinship ends here. Venus is very different from the Earth. It has no oceans and is surrounded by a heavy atmosphere composed mainly of carbon dioxide with virtually no water vapor. Its clouds are composed of sulfuric acid droplets. At the surface, the atmospheric pressure is 92 times that of the Earth's at sea-level.

Venus is scorched with a surface temperature of about 482° C (900° F). This high temperature is primarily due to a runaway greenhouse effect caused by the heavy atmosphere of carbon dioxide. Sunlight passes through the atmosphere to heat the surface of the planet. Heat is radiated out, but is trapped by the dense atmosphere and not allowed to escape into space. This makes Venus hotter than Mercury.

http://www.solarviews.com/eng/venus.htm

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