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Thread: Climate Change & Global Warming

  1. #11
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    Thumbs Up Re: Dissapearing Arctic lakes linked To climate change

    Yeh, the situation is much more serious than it may seem... you just gotta take a look at temperatures in Europe... France, Italy or Spain had never before experienced such freezing winters and so burning summers... and the growing of the sea level is gonna be a huge problem in very few time in all European coastal areas, specially in Italy, the Netherlands...
    and all we do is to sign that useless Kyoto treaty (the USA do not even do that.... I am so dissapointed about it!?! Why isnt there any serious social group asking for measures to be taken in the USA?)
    And besides, the treaty is a mess.... it was done by Germany, the UK and some other industrial countries. It orders the different countries to reduce the amount of CO2 that they produced in 1990.... and by that time Germany (and many others) already polluted much more than what they should. The decission was taken in order not to disgust the big enterprisers that are the ones that give the money. So frustrating.
    I guess Venice will have to sink before we realize what is going on.



    (By the way...this is my first post... I had been reading the posts of other users of Skadi since some weeks ago but eventually i decided i wanted to participate. Nice to meet you all)

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    Study Shows Big Game Hunters, Not Climate Change, Killed Off Sloths

    Intersting article, thought I'd share

    http://www.sciencedaily.com/releases...0803173345.htm

    GAINESVILLE, Fla. -- Prehistoric big game hunters and not the last ice age are the likely culprits in the extinction of giant ground sloths and other North American great mammals such as mammoths, mastodons and saber-toothed tigers, says a University of Florida researcher.

  3. #13
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    Warming hits 'tipping point'

    Siberia feels the heat It's a frozen peat bog the size of France and Germany combined, contains billions of tonnes of greenhouse gas and, for the first time since the ice age, it is melting

    Ian Sample, science correspondent
    Thursday August 11, 2005
    The Guardian


    A vast expanse of western Sibera is undergoing an unprecedented thaw that could dramatically increase the rate of global warming, climate scientists warn today.

    Researchers who have recently returned from the region found that an area of permafrost spanning a million square kilometres - the size of France and Germany combined - has started to melt for the first time since it formed 11,000 years ago at the end of the last ice age.

    The area, which covers the entire sub-Arctic region of western Siberia, is the world's largest frozen peat bog and scientists fear that as it thaws, it will release billions of tonnes of methane, a greenhouse gas 20 times more potent than carbon dioxide, into the atmosphere.

    It is a scenario climate scientists have feared since first identifying "tipping points" - delicate thresholds where a slight rise in the Earth's temperature can cause a dramatic change in the environment that itself triggers a far greater increase in global temperatures.

    The discovery was made by Sergei Kirpotin at Tomsk State University in western Siberia and Judith Marquand at Oxford University and is reported in New Scientist today.

    The researchers found that what was until recently a barren expanse of frozen peat is turning into a broken landscape of mud and lakes, some more than a kilometre across.

    Dr Kirpotin told the magazine the situation was an "ecological landslide that is probably irreversible and is undoubtedly connected to climatic warming". He added that the thaw had probably begun in the past three or four years.

    Climate scientists yesterday reacted with alarm to the finding, and warned that predictions of future global temperatures would have to be revised upwards.

    "When you start messing around with these natural systems, you can end up in situations where it's unstoppable. There are no brakes you can apply," said David Viner, a senior scientist at the Climatic Research Unit at the University of East Anglia.

    "This is a big deal because you can't put the permafrost back once it's gone. The causal effect is human activity and it will ramp up temperatures even more than our emissions are doing."

    In its last major report in 2001, the intergovernmental panel on climate change predicted a rise in global temperatures of 1.4C-5.8C between 1990 and 2100, but the estimate only takes account of global warming driven by known greenhouse gas emissions.

    "These positive feedbacks with landmasses weren't known about then. They had no idea how much they would add to global warming," said Dr Viner.

    Western Siberia is heating up faster than anywhere else in the world, having experienced a rise of some 3C in the past 40 years. Scientists are particularly concerned about the permafrost, because as it thaws, it reveals bare ground which warms up more quickly than ice and snow, and so accelerates the rate at which the permafrost thaws.

    Siberia's peat bogs have been producing methane since they formed at the end of the last ice age, but most of the gas had been trapped in the permafrost. According to Larry Smith, a hydrologist at the University of California, Los Angeles, the west Siberian peat bog could hold some 70bn tonnes of methane, a quarter of all of the methane stored in the ground around the world.

    The permafrost is likely to take many decades at least to thaw, so the methane locked within it will not be released into the atmosphere in one burst, said Stephen Sitch, a climate scientist at the Met Office's Hadley Centre in Exeter.

    But calculations by Dr Sitch and his colleagues show that even if methane seeped from the permafrost over the next 100 years, it would add around 700m tonnes of carbon into the atmosphere each year, roughly the same amount that is released annually from the world's wetlands and agriculture.

    It would effectively double atmospheric levels of the gas, leading to a 10% to 25% increase in global warming, he said.

    Tony Juniper, director of Friends of the Earth, said the finding was a stark message to politicians to take concerted action on climate change. "We knew at some point we'd get these feedbacks happening that exacerbate global warming, but this could lead to a massive injection of greenhouse gases.

    "If we don't take action very soon, we could unleash runaway global warming that will be beyond our control and it will lead to social, economic and environmental devastation worldwide," he said. "There's still time to take action, but not much.

    "The assumption has been that we wouldn't see these kinds of changes until the world is a little warmer, but this suggests we're running out of time."

    In May this year, another group of researchers reported signs that global warming was damaging the permafrost. Katey Walter of the University of Alaska, Fairbanks, told a meeting of the Arctic Research Consortium of the US that her team had found methane hotspots in eastern Siberia. At the hotspots, methane was bubbling to the surface of the permafrost so quickly that it was preventing the surface from freezing over.

    Last month, some of the world's worst air polluters, including the US and Australia, announced a partnership to cut greenhouse gas emissions through the use of new technologies.

    The deal came after Tony Blair struggled at the G8 summit to get the US president, George Bush, to commit to any concerted action on climate change and has been heavily criticised for setting no targets for reductions in greenhouse gas emissions.

    http://www.guardian.co.uk/internatio...546797,00.html

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

    Scenarios like this were probably noticed a long time ago. It's just that acting to prevent them would have compromised the Individual, and that isn't in the best interests of our modern world.

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    Quote Originally Posted by Frostwood
    Last month, some of the world's worst air polluters, including the US and Australia, announced a partnership to cut greenhouse gas emissions through the use of new technologies.
    Thanks for the contribution, Bush. :frown: It would be greater if they raised the tax on patrol, electricity etc. ten times.

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    Quote Originally Posted by CONSTANTINUS
    If half of those ecological doomsday scenarios we hear of would be true, the oceans would be boiling by now.
    Well, studies differ. Some of them proclaim we have to swim to our jobs tomorrow, others deem that we have still a lot of time in our hands. The one unifying point between these studies is that global warming actually happens, in one way or another (lest the study be funded by car industry). Be the reasons primarily our reckless and arrogant relationship with our land or the cyclic nature of Earth's shifting temperature, it's still happening, and it can't be escaped behind delusions of progress. Even if the reason would primarily be that we happen to live in a period of warming wholly natural to Earth, I doubt pollution helps us much.

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    Quote Originally Posted by hauer
    Thanks for the contribution, Bush. :frown: It would be greater if they raised the tax on patrol, electricity etc. ten times.
    In theory raising taxes sound good.But from experience from sweden that doesnt seem to work.All it does is put a strain on the economy due to higer transport costs.But i do hate it when they destroy unike habitats for money.
    To live is to fight.

    To die is to give up.

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    Quote Originally Posted by hauer
    Thanks for the contribution, Bush. :frown: It would be greater if they raised the tax on patrol, electricity etc. ten times.
    How about just not use patrol at all?:laugh:

    Quote Originally Posted by Nightmare_Gbg
    In theory raising taxes sound good.But from experience from sweden that doesnt seem to work.All it does is put a strain on the economy due to higer transport costs.But i do hate it when they destroy unike habitats for money.
    Yeah everything in Sweden except train transportation is insanely expensive. Eco friendly is good but their needs to be balance.

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    green-house gases?

    a friend of mine grows trees
    that he sells to landscapers.

    the trees are growing in wooden boxes
    on his property.

    some of the trees are over twenty feet tall.
    i asked him what he does when they get too old.
    "as long as i water them
    and they keep breathing...
    besides, the big ones are worth more."

    i thought it might be awkward
    to change the dirt,
    if they get too big.
    "change the dirt? why?"

    does not the tree use up all the nutrients
    in the dirt, after a while?

    using his big toe,
    he scratched "CH2O" in the earth.
    "that's the formula for wood.
    trees suck that outa the air.
    the dirt just holds 'em down."

    a simplification, surely,
    but it does address the "problem"
    of green-house gases
    - in the same way nature always has.

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    What are you trying to say?:

  10. #20
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    Quote Originally Posted by Northern_Paladin
    What are you trying to say?:
    the evolution of chloroplasts
    made possible a world for air-breathing animals.

    they suck the "green-house gases" out of the air
    and lock it up as cellulose.

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