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    World is at its hottest Since Prehistory, say Scientists
    Posted on Monday, December 19, 2005 @ 21:10:00 GMT by vlad

    General Overtone writes: By Geoffrey Lean, Environment Editor, The Independent, UK Published: 18 December 2005

    The world is now hotter than at any stage since prehistoric times, a top climatologist announced last week. His startling conclusion comes as Nasa reported that 2005 has been the hottest year ever recorded.

    Dr Michael Coughlan, head of the National Climate Centre at the Australian Government's Bureau of Meteorology, said: "One probably has to go back into prehistoric times - and way back in them - to be seeing these sorts of temperatures."

    Top British climatologists agree privately but are cautious of saying so in public because, naturally, no measurements were taken of temperatures then.



    Dr Coughlan is supported by research that shows carbon dioxide levels in the air - the main cause of global warming - are higher now than at any time in the past hundreds of thousands of years.

    Scientists in Bern, Switzerland, and Oregon in the United States analysed levels of the gas in tiny air bubbles trapped in Antarctic ice during the past 650,000 years. They found current levels were 27 per cent greater than the highest level over that period.

    Professor Sir David King, the Government's Chief Scientist, has said the last time levels of the gas were that high was 60 million years ago. And that was during a period of rapid warming in the Palaeocene epoch, which caused a massive reduction in life on Earth.

    Meanwhile, top climatological bodies around the world report that 2005 is vying with 1998 as the warmest year on record. Nasa says it just beats it, while the Met Office says it is just behind it, and the US government's National Climatic Data Centre says the two years are statistically indistinguishable.

    Whichever is right, 2005 has been a remarkable year, for 1998 was made much hotter by a strong El Niño, the warm Pacific current that strongly affects weather around the globe.

    Last June, September and October were all logged as the warmest ever, world-wide. The past 10 years are all in the warmest 10 ever recorded, apart from 1996 whose place is taken by 1990.

    This year Arctic sea ice dropped to its smallest ever extent, the Atlantic suffered a record hurricane season and an unprecedented drought reduced the flow of the Amazon to its lowest ever level. Canada and Australia had their hottest ever weather this year, while India, Pakistan, Bangladesh and Algeria suffered heatwaves touching 50C.



     
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    "World is at its hottest Since Prehistory, say Scientists" | Login/Create an Account | 2 comments | Search Discussion
    The comments are owned by the poster. We aren't responsible for their content.

    No Comments Allowed for Anonymous, please register

    Ice logs (Score: 1)
    by seanu on Tuesday, December 20, 2005 @ 06:16:53 GMT
    (User Info | Send a Message)
    Studpid question here, not the right place to ask but someone might help clarify it.

    They use ice cores the estimate that levels of CO2 over the past 650k years and state levels have never been this high. If higher CO2 means higher temperature, more melting etc, how can they know that higher periods of CO2 haven't melted away the ice before?

    With all the ice melting away now how can it be determine in 100k year time that we had a high period of CO2 in ~2005? all the ice would have melted away together with the evidence.


    • Re: Ice logs by pulsed_ignition on Wednesday, December 21, 2005 @ 15:29:13 GMT

     

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