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Discussion in 'All Things Boats & Boating' started by ImaginaryNumber, Oct 8, 2015.

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  1. tom kane
    Joined: Nov 2003
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    Location: Hamilton.New Zealand.

    tom kane Senior Member

  2. myark
    Joined: Oct 2012
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    myark Senior Member

    Quote
    Greenland's ice melt accelerating as surface darkens, raising sea levels

    https://nz-mg5.mail.yahoo.com/neo/launch?.rand=3of0sh94vhofq

    Greenland’s vast ice sheet is in the grip of a dramatic “feedback loop” where the surface has been getting darker and less reflective of the sun, helping accelerate the melting of ice and fuelling sea level rises, new research has found.


    The snowy surface of Greenland started becoming significantly less reflective of solar radiation from around 1996, the analysis found, with the ice absorbing 2% more solar energy per decade from this point. At the same time, summer near-surface temperatures in Greenland have increased at a rate of around 0.74C per decade, causing the ice to melt.

    This winnowing away of the ice, exacerbated by soot blown on to the ice from wildfires, means that Greenland’s ice is stuck in what is known as a “feedback loop” that will make it ever more vulnerable to warming global temperatures. The study predicts that the ice surface reflectivity, or albedo, will drop by 10% or more by the end of the century, which will trigger further melting.

    “It’s melting cannibalism, basically – it’s melting that’s feeding itself,” said lead author Marco Tedesco, of Columbia University’s Lamont-Doherty Earth Observatory. “Rising temperatures are promoting more melting, and that melting is reducing albedo, which in turn is increasing melting.

    It’s worrying because if the ice sheet continues to get darker, it becomes more sensitive to atmospheric warming. The impact of two weeks of sunshine with no clouds, for example, is far greater than it was 20 years ago. The ice is going to melt much more quickly, with more water flowing off on to the sea.”
     
  3. Mr Efficiency
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    Mr Efficiency Senior Member

    We'll all be ruined !
     
  4. Pericles
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    Location: Heights of High Wycombe, not far from River Thames

    Pericles Senior Member

  5. ImaginaryNumber
    Joined: May 2009
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    ImaginaryNumber Imaginary Member

    While that may have been true at one time, sadly, the way humans typically think about problems and how to solve them does not work well when it comes to reacting to and solving AGW. Our 'lower' or 'primitive' brain just can't compute that sea level rising at 1/10" per year is a problem, or that temperatures going up at a rate of 2 degrees per century is alarming. Our 'higher' or 'rational' brain can understand this, but usually it is the 'lower' brain that makes the decisions.

    Your brain on climate change: why the threat produces apathy, not action | The Guardian
    Unfortunately, some of the most highly esteemed members of this forum are textbook examples of how the 'lower' brain reacts to AGW. We are privileged to be lectured by them on an almost daily basis how all is well, and any concern we might have regarding AGW is misplaced at best, and likely quite harmful for our current lifestyle. Apparently, if means little to them the legacy we leave to future generations, as long as we can slumber peacefully in the here and now.

    Since it is apparently okay for even the Devil to quote scripture, a passage from Ezekiel 33 might be edifying, even if taken a little out of context:
     
  6. Mr Efficiency
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    Mr Efficiency Senior Member

    Not hard to believe in GW based on the torrid summer just ended in Australia. Lots of records broken.
     
  7. myark
    Joined: Oct 2012
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    myark Senior Member

    With out reading the brilliant article you produced I came to the same obvious conclusions but did not know how to place in words for a caveman thinking to understand.
     
  8. Yobarnacle
    Joined: Nov 2011
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    Location: Mexico, Florida

    Yobarnacle Senior Member holding true course

    We will all wait and see.
     
  9. myark
    Joined: Oct 2012
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    myark Senior Member

    quote
    January and February have both broken temperature records. Karl Mathiesen examines how much is down to El Niño versus manmade climate change

    http://www.theguardian.com/environm...-change-behind-the-run-of-record-temperatures

    Yet another global heat record has been beaten. It appears January 2016 - the most abnormally hot month in history, according to Nasa - will be comprehensively trounced once official figures come in for February.

    Initial satellite measurements, compiled by Eric Holthaus at Slate, put February’s anomaly from the pre-industrial average between 1.15C and 1.4C. The UN Paris climate agreement struck in December seeks to limit warming to 1.5C if possible.

    “Even the lower part of that range is extraordinary,” said Will Steffen, an emeritus professor of climate science at Australian National University and a councillor at Australia’s Climate Council.


    It appears that on Wednesday, the northern hemisphere even slipped above the milestone 2C average for the first time in recorded history. This is the arbitrary limit above which scientists believe global temperature rise will be “dangerous”.

    The Arctic in particular experienced terrific warmth throughout the winter. Temperatures at the north pole approached 0C in late December – 30C to 35C above average.

    Mark Serreze, the director of the US National Snow and Ice Data Centre, described the conditions as “absurd”.

    “The heat has been unrelenting over the entire season,” he said. “I’ve been studying Arctic climate for 35 years and have never seen anything like this before”.

    All this weirdness follows the record-smashing year of 2015, which was 0.9C above the 20th century average. This beat the previous record warmth of 2014 by 0.16C.

    But the atmosphere doesn’t stop at the surface. In fact 93% of the extra energy trapped by the greenhouse gases humans have emitted gets sunk into the oceans – just 1% ends up in the atmosphere where temperature is most often and most thoroughly measured. During El Niño, which occurs every three to six years, currents in the Pacific Ocean bring warm water to the surface and heat up the air.

    Jeff Knight from the Met Office’s Hadley Centre, said their modelling set the additional heat from a big El Niño, like the current one, at about 0.2C. He said wind patterns in the northern hemisphere had added another 0.1C to recent monthly readings.




    “The bottom line is that the contributions of the current El Niño and wind patterns to the very warm conditions globally over the last couple of months are relatively small compared to the anthropogenically driven increase in global temperature since pre-industrial times,” he added.
     
  10. hoytedow
    Joined: Sep 2009
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    hoytedow Carbon Based Life Form

  11. Yobarnacle
    Joined: Nov 2011
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    Yobarnacle Senior Member holding true course

    correct, Hoyt
     
  12. ImaginaryNumber
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    ImaginaryNumber Imaginary Member

    Sleep on, my friend.
     
  13. Yobarnacle
    Joined: Nov 2011
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    Yobarnacle Senior Member holding true course

    You think I'm sleeping? :cool:

    syncope
    noun syn·co·pe \ˈsiŋ-kə-(ˌ)pē, ˈsin-\
    Definition of syncope

    1: loss of consciousness resulting from insufficient blood flow to the brain : faint


    You're confusing me with armchair philosophers, and deskbound bureaucrats, and ivory tower syncopates, or any other bloodless couch potatoes.
    I'm an adrenalin junkie! A man of action. Adventurer!
    I get MY thrills first hand from living, not imagining monsters in the shadows of my mind.

    The climate is not sensitive. Illogical to think it is.
    We wouldn't BE here if it was.
    Billions of years? Climate can't be sensitive!
    Our planet is self regulating and nature is compensating.
    That's it in a nut shell.
    The USA is going to wait.
    And everybody will eventually see.

    [​IMG]
     

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  14. ImaginaryNumber
    Joined: May 2009
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    ImaginaryNumber Imaginary Member

    You seem to have a much higher tolerance to temperature variations than most Floridians -- indeed, than most people in the world. It might be worthwhile noting that human civilization developed in the last 10K years, and that projected temperatures for 2050 and 2100 are WAY higher than humans have ever seen.

    [​IMG]
    Geologic temperature record | Wikipedia
     

  15. ImaginaryNumber
    Joined: May 2009
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    Location: USA

    ImaginaryNumber Imaginary Member

    New satellite data shows no pause in global warming TV NZ
     
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