Climate change: Arctic passes 400 parts per million milestone

Discussion in 'Environment' started by Matthew, May 31, 2012.

  1. Matthew
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    Matthew Blue dog all the way!

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    Climate change: Arctic passes 400 parts per million milestone
    Climate change: Arctic passes 400 parts per million milestone - CSMonitor.com

    Arctic monitoring stations show carbon dioxide levels are now above 400 parts per million. Carbon dioxide is the chief climate-change gas and stays in the atmosphere for 100 years. Before the Industrial Age, carbon dioxide levels were 275 ppm.



    The world's air has reached what scientists call a troubling new milestone for carbon dioxide, the main global warming pollutant.
    Monitoring stations across the Arctic this spring are measuring more than 400 parts per million of the heat-trapping gas in the atmosphere. The number isn't quite a surprise, because it's been rising at an accelerating pace. Years ago, it passed the 350 ppm mark that many scientists say is the highest safe level for carbon dioxide. It now stands globally at 395.

    So far, only the Arctic has reached that 400 level, but the rest of the world will follow soon.



    "The fact that it's 400 is significant," said Jim Butler, global monitoring director at the National Oceanic and Atmospheric Administration's Earth System Research Lab in Boulder, Colo. "It's just a reminder to everybody that we haven't fixed this and we're still in trouble."

    Carbon dioxide is the chief greenhouse gas and stays in the atmosphere for 100 years. Some carbon dioxide is natural, mainly from decomposing dead plants and animals. Before the Industrial Age, levels were around 275 parts per million.

    For more than 60 years, readings have been in the 300s, except in urban areas, where levels are skewed. The burning of fossil fuels, such as coal for electricity and oil for gasoline, has caused the overwhelming bulk of the man-made increase in carbon in the air, scientists say.

    It's been at least 800,000 years — probably more — since Earth saw carbon dioxide levels in the 400s, Butler and other climate scientists said.

    Until now.

    Readings are coming in at 400 and higher all over the Arctic. They've been recorded in Alaska, Greenland, Norway, Iceland and even Mongolia. But levels change with the seasons and will drop a bit in the summer, when plants suck up carbon dioxide, NOAA scientists said.

    So the yearly average for those northern stations likely will be lower and so will the global number.

    Globally, the average carbon dioxide level is about 395 parts per million but will pass the 400 mark within a few years, scientists said.

    The Arctic is the leading indicator in global warming, both in carbon dioxide in the air and effects, said Pieter Tans, a senior NOAA scientist.

    "This is the first time the entire Arctic is that high," he said.

    Tans called reaching the 400 number "depressing," and Butler said it was "a
     
  2. bobgnote
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    bobgnote BANNED

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    Matthew, make sure you come around and post in reply to my OPs and comments, at this and other threads, since we are bound to see a flock of skeptic geeks come around, to try to hijack this thread.

    You will see quote in quote in quote, with propaganda, and you will see my comments, about carbonic acidification and re-greening, which are all over threads like this one, just from one week of USMB.

    Acidification is going to get worse, and then we will face collapse, of the oceanic food chain. Re-green, or die!
     
  3. bobgnote
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    bobgnote BANNED

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    I'll be darned. The skeptics aren't responding, to this post. I guess they can't argue, with 400 ppm atmospheric CO2, all the way, from 275 ppm CO2, in the 19th Century.

    Something needs to get done, yesterday, for instance re-greening and CO2-neutral biomass, both.
     
  4. Liability
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    Liability Locked Account. Supporting Member

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    1 part out of every 2,500?

    AHHHHH! Global Inferno!
     
  5. Oddball
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    Oddball BANNED Supporting Member

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    Unless, of course, it gets absorbed by the flora of the Earf prior to that time.
    Correlation still doesn't equal causation, no matter how many times you try to say it does.
     
  6. Rat in the Hat
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    Rat in the Hat Gold Member

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    Climate change: Arctic passes 400 parts per million milestone

    We have got to get those polar bears to stop driving SUV's.
     
  7. bobgnote
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    bobgnote BANNED

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    You forgot how methane is being released, to accelerate warming, since the first quote is not mine. You forgot how 350 ppm CO2 is the maximum safe level, and the Arctic is at 400 ppm, now, since you got the 2nd quote from me.

    Causation of warming phenomena is partly human. Relief and remedy are 100% human responsibility. You are dumb as shit. Quit selectively quoting and fucking up replies.
     
  8. CrusaderFrank
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    CrusaderFrank Diamond Member

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    How is global warming melting the floor of the Arctic Ocean?
     
  9. usmcstinger
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    usmcstinger Silver Member

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    Have you ever heard of Weather Cycles?
     
  10. Old Rocks
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    Weather cycles cause 400 ppm of CO2 in the Arctic? May I inquire as to how you reached this conclusion?
     

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