Melting ice sheets alarm scientists

Discussion in 'Environment' started by amiam*, Sep 24, 2009.

  1. amiam*
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    amiam* Member

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    The following appeared in today's newspaper. The report is from the British Journal Nature. There seems to be a great concern that the melting of the polar ice is quickening.


     
    Last edited: Sep 25, 2009
  2. Oddball
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    Oddball BANNED Supporting Member

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    [ame=http://www.youtube.com/watch?v=6TDqvD34hEA]YouTube - Gloom Despair[/ame]
     
  3. RetiredGySgt
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  4. RetiredGySgt
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    RetiredGySgt Platinum Member

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    Ok I used the quote function to quote the first post. I made no alterations to it and yet it is hosed. WHY?
     
  5. k2skier
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    k2skier Senior Member

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    Nice data to support your view point:cuckoo:

    To have a closed mind on this subejct...is to ignore all the data...

    NSIDC Press Room: Arctic sea ice reaches lowest extent for 2009

    The Arctic sea ice cover appears to have reached its minimum extent for the year, the third-lowest extent recorded since satellites began measuring minimum sea ice extent in 1979. While this year’s minimum extent was greater than the past two years, it is still below the long-term average, and well outside the range of natural variability.
     
  6. k2skier
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    k2skier Senior Member

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  7. Old Rocks
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    Old Rocks Diamond Member

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    No, at the time of Eric the Red, the Greenland was no greener than it is right now. The name was a saleman's ploy to attract settlers. It was a marginal colony at the best of times. See Jared Diamond's "Collapse" for the real information concerning the settling of the colony and it's subsequent collapse.
     
  8. Old Rocks
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    Old Rocks Diamond Member

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    Firstly, Greenland is just a part of a single region and as such can not be assumed to represent any kind of global climate shift. See the article on the Medieval Warm Period for a global perspective on this time period. In short, the available proxy evidence indicates that globally warmth during this period was not particularly pronounced though certainly some regions may have experienced greater warming than others.

    Secondly, a quick reality check shows that Greenland's ice cap is hundreds of thousands of years old and covers over 80% of that island. The vast majority of land not under an ice sheet is rock and permafrost in the far north. Just how different could it have been only 1000 years ago?

    Here is a brief account of the Viking settlement, which was an actual historical development, based on the chapter on Vikings in Greenland in Jared Diamond's "Collapse".

    Greenland was called Greenland by Erik the Red (was he red? :) who was in exile and wanted to attract people to a new colony. He believed that you should give a land a good name so that people want to go there! It very likely was a bit warmer when he landed for the first time than it was when the last settlers starved due to a number of factors, climate change, or at least some bad weather, a major one. But it was never lush and their existence was always harsh and meagre, especially due to the Viking's disdain for other peoples and other ways of living. They attempted to live a European lifestyle in an arctic climate side by side with the Inuit who easily out survived them. For heaven's sake, these people starved surrounded by oceans and yet never ate fish! (Note: this was not a typical European behaviour and is in fact a bit of a mystery to this day).

    Instead of hunting whales in kayaks, they farmed cattle, goats and sheep despite having to keep them in a barn 24 hours a day, 7 days a week, for a full 5 months out of the year! It was a constant challenge to get enough fodder for the winter. Starvation of the animals was frequent, emaciation routine. The pressures of grazing requirements and growing fodder for the winter led to over production of pastures, erosion and the need to go further and further a field to sustain the animals. Deforestation for pastures and firewood proceeded at unsustainable rates, leading, after a couple of centuries, to such desperate measures as having to cut precious sod for housing construction and even burning it for cooking and heating fuel.
    Greenland Used to be Green : A Few Things Ill Considered
     
  9. RetiredGySgt
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    30 years of data do not make a LONG TERM average worth anything. Especially when discussing the EARTH. There was a major warming trend from the mid 20's to the end of the 40's in the Arctic. We have no measurements for those times much l;ess the thousands of years before that. Basing long term plans or claiming normal events or trends based on 30 years of the life of planet BILLIONS of years old is ludicrous. It is not scientific.
     
  10. KittenKoder
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    Rocks, you need to stop getting your scientific articles from American Idol.
     

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