Arctic warming not natural

Discussion in 'Environment' started by Old Rocks, Jan 27, 2009.

  1. Old Rocks
    Offline

    Old Rocks Diamond Member

    Joined:
    Oct 31, 2008
    Messages:
    46,471
    Thanks Received:
    5,416
    Trophy Points:
    1,840
    Location:
    Portland, Ore.
    Ratings:
    +10,315
    Climate warming 'highly unusual' says new study



    A major U.S. government report on Arctic climate, prepared with information from eight Canadian scientists, has concluded that the recent rapid warming of polar temperatures and shrinking of multi-year Arctic sea ice are "highly unusual compared to events from previous thousands of years."

    The findings, released Friday, counter suggestions from skeptics that such recent events as the opening of the Northwest Passage and collapse of ice shelves in the Canadian Arctic are predictable phenomena that can be explained as part of a natural climate cycle rather than being driven by elevated carbon emissions from human activity.

    A summary of the report -- described as "the first comprehensive analysis of the real data we have on past climate conditions in the Arctic," by U.S. Geological Survey director Mark Myers -- warns that "sustained warming of at least a few degrees" is probably enough "to cause the nearly complete, eventual disappearance of the Greenland ice sheet, which would raise sea level by several metres."

    The study also sounds the alarm that "temperature change in the Arctic is happening at a greater rate than other places in the Northern Hemisphere, and this is expected to continue in the future. As a result, glacier and ice-sheet melting, sea-ice retreat, coastal erosion and sea-level rise can be expected to continue."

    Ice cover in the Canadian Arctic and throughout the polar world has experienced record-setting melts in the past few years. The summer of 2007 saw polar ice cover shrink to its lowest extent in recorded history. Last summer's melt came close to matching that record, and recent research indicates that overall ice volume -- because of the continual replacement of thicker, multi-year ice with thinner new ice -- was lower in 2008 than 2007.

    This past summer also saw further dramatic evidence of the unusual warming of the Canadian Arctic, including record-setting high temperatures in Iqaluit, Nunavut, rapid erosion and flooding of a glacial landscape on Baffin Island, the re-opening of the Northwest Passage, an unprecedented clearing of ice from the Beaufort Sea and the collapse of hundreds of square kilometres of ancient ice shelves on Ellesmere Island.

    Research for the U.S. Congress-commissioned report was conducted by 37 scientists from the U.S., Germany, Canada, Britain and Denmark.

    "The current rate of human-influenced Arctic warming is comparable to peak natural rates documented by reconstructions of past climates. However, some projections of future human-induced change exceed documented natural variability," the scientists conclude. "The past tells us that when thresholds in the climate system are crossed, climate change can be very large and very fast. We cannot rule out that human-induced climate change will trigger such events in the future."

    © Copyright (c) The Vancouver Sun
     
  2. dilloduck
    Offline

    dilloduck Diamond Member

    Joined:
    May 8, 2004
    Messages:
    53,240
    Thanks Received:
    5,552
    Trophy Points:
    1,850
    Location:
    Austin, TX
    Ratings:
    +6,403
    who cares ?
     
  3. Old Rocks
    Offline

    Old Rocks Diamond Member

    Joined:
    Oct 31, 2008
    Messages:
    46,471
    Thanks Received:
    5,416
    Trophy Points:
    1,840
    Location:
    Portland, Ore.
    Ratings:
    +10,315
    People with more than two digit IQs.
     
  4. dilloduck
    Offline

    dilloduck Diamond Member

    Joined:
    May 8, 2004
    Messages:
    53,240
    Thanks Received:
    5,552
    Trophy Points:
    1,850
    Location:
    Austin, TX
    Ratings:
    +6,403
    oh my--you have the wrong forum then :lol:
     
  5. DavidS
    Offline

    DavidS Anti-Tea Party Member

    Joined:
    Sep 7, 2008
    Messages:
    9,811
    Thanks Received:
    766
    Trophy Points:
    48
    Location:
    New York, NY
    Ratings:
    +767
    The arctic is warming because of methane that is slowly being released from underneath the sea. This is a natural event.
     
  6. JohnStOnge
    Offline

    JohnStOnge Member

    Joined:
    Jul 8, 2005
    Messages:
    321
    Thanks Received:
    42
    Trophy Points:
    16
    Ratings:
    +42
    How come you guys don't kind of cut up the quoted portions to shorten things?
     
  7. Old Rocks
    Offline

    Old Rocks Diamond Member

    Joined:
    Oct 31, 2008
    Messages:
    46,471
    Thanks Received:
    5,416
    Trophy Points:
    1,840
    Location:
    Portland, Ore.
    Ratings:
    +10,315
    No, David, that release in not a natural event. It is only happening because of the warming caused by the adding of GHGs to the atmosphere.

    ScienceDaily (Dec. 18, 2008) — A team led by International Arctic Research Center scientist Igor Semiletov has found data to suggest that the carbon pool beneath the Arctic Ocean is leaking.


    --------------------------------------------------------------------------------

    Methane
    The results of more than 1,000 measurements of dissolved methane in the surface water from the East Siberian Arctic Shelf this summer as part of the International Siberian Shelf Study show an increased level of methane in the area. Geophysical measurements showed methane bubbles coming out of chimneys on the seafloor.

    “The concentrations of the methane were the highest ever measured in the summertime in the Arctic Ocean,” Semiletov said. “We have found methane bubble clouds above the gas-charged sediment and above the chimneys going through the sediment.”

    The new data indicates the underwater permafrost is thawing and therefore releasing methane. Permafrost can affect methane release in two ways. Both underwater and on land, it contains frozen organic material such as dead plants and animals. When permafrost thaws, that organic material decomposes, releasing gases like methane and carbon dioxide. In addition, methane, either in gas form or in ice-like methane hydrates, is trapped underneath the permafrost. When the permafrost thaws, the trapped methane can seep out through the thawed soil. Methane, a greenhouse gas 20 times more powerful than carbon dioxide, is thought to be an important factor in global climate change
    Scientists Find Increased Methane Levels In Arctic Ocean
     
  8. JohnStOnge
    Offline

    JohnStOnge Member

    Joined:
    Jul 8, 2005
    Messages:
    321
    Thanks Received:
    42
    Trophy Points:
    16
    Ratings:
    +42
    "'The current rate of human-influenced Arctic warming is comparable to peak natural rates documented by reconstructions of past climates. However, some projections of future human-induced change exceed documented natural variability,' the scientists conclude."'

    Study that statement and think about it.
     
  9. JohnStOnge
    Offline

    JohnStOnge Member

    Joined:
    Jul 8, 2005
    Messages:
    321
    Thanks Received:
    42
    Trophy Points:
    16
    Ratings:
    +42
    In general I discourage ad hominem argument. However, I've noticed that those who advocate taking drastic action to save the planet from human-induced climate change spend a pretty good bit of time attacking things like who those who disagree with their position are funded by. So, like, if there is a study funded by oil companies they say, "You can't believe that because it was funded by oil companies."

    Well, this study was commissioned by a Democrat controlled US Congress under circumstances where it's clear that Democrats want to impose certain controls and requirements. I think it's pretty reasonable to assume that when they commissioned this study they were wanting a certain result.

    So I'm wondering: Are the people that have been saying people like, say, Richard Lindzen can't be taken seriously because of some of his funding sources now going to say this study can't be taken seriously because it was comissioned by a Democrat controlled US Congress?
     
    Last edited: Jan 27, 2009
  10. alan1
    Offline

    alan1 USMB Mod Staff Member Supporting Member

    Joined:
    Dec 13, 2008
    Messages:
    18,845
    Thanks Received:
    3,577
    Trophy Points:
    245
    Location:
    Shoveling the ashes
    Ratings:
    +3,769
    Global climate change is as natural as homosexuality.
    Get used to it.
     

Share This Page