Earth on the Brink of an Ice Age

Discussion in 'Environment' started by KMAN, Jan 12, 2009.

  1. KMAN
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    KMAN Senior Member

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  2. Andrew2382
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    Andrew2382 Gold Member

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    must be that global warming
     
  3. Chris
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    Chris Gold Member

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    KMAN is quoting Pravda?
     
  4. Tech_Esq
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    Tech_Esq Sic Semper Tyrannis!

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    That was on my thread too. Also the Tech Notes article that said that the sea ice was at 1979 levels. Sorry Chris
     
  5. Amanda
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    Amanda Calm as a Hindu cow

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    I don't understand how global warming is supposed to lead to an ice age. Seems kinda counterintuitive.
     
  6. Dis
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  7. sealybobo
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    sealybobo Diamond Member

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    Global warming is just the term we use to describe it. If you can get it out of your head that it always means WARMING, then maybe it'll be easier for you to understand.

    We're causing climate change. That could mean the polar caps completely melt in the summer, and raise water levels 40 feet.

    Or, we could be causing the ice to completely freeze over in the winter, and that too could kill off seals and polar bears.
     
  8. michaelX9011
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    michaelX9011 Rookie

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    How could you separate the difference between us causing the effects, or the effects just being created by the Earth's geological cycle? Are we effecting the Earth's evolution?
     
  9. Old Rocks
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    Old Rocks Diamond Member

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    Sorry that you do not know your ass from a hole in the ground. Here are the actual facts on the current extent of the arctic ice;

    Arctic Sea Ice News & Analysis
     
  10. Old Rocks
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    Old Rocks Diamond Member

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    OK. Here are the facts. The earth is warming. Warming rapidly, and the warming is accelerating. All but two of the warmest ten years recorded have been in this century. And those two exceptions were 1997 and 1998.

    So, what is causing the warming? The sun? No, we have satellite records of the total solar irradiance for the last fifty years, and it has hardly changed, may have actualy diminished an insignificant amount. Has there been unusual volcanic activity? No, in fact the last century was a rather mild one in terms of volcanic eruptions. So, what has changed?

    Well, we added about 40% more CO2 to the atmosphere. And and about 250% more CH4. As well as other even more potent industrial gases. In the geological record there have been other periods of rapid increases in GHGs. Most of the time they led to periods of major or minor extinctions. The last time the CO2 level reached 300 ppm, the oceans were about 3 meters higher than at present. Today, we have 385+ ppm in the atmosphere. That will have a major impact in the coming years. More importantly, we are increasing that amount every year.
     

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