• Ice Cores Get Complicated

    • Date: 26/06/12

    Ice samples pulled from nearly a mile below the surface of Greenland glaciers have long served as a historical thermometer, adding temperature data to studies of the local conditions up to the Northern Hemisphere’s climate. But the method — comparing the ratio of oxygen isotopes buried as snow fell over millennia — may not be […]

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  • False Alarm: Antarctic Ice Shelves Not Melting At All, New Field Data Show

    • Date: 25/06/12

    Twenty-year-old models which have suggested serious ice loss in the eastern Antarctic have been compared with reality for the first time – and found to be wrong, so much so that it now appears that no ice is being lost at all. “Previous ocean models … have predicted temperatures and melt rates that are too […]

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  • Not So Hot In East China

    • Date: 23/06/12

    While the IPCC is big on the idea that the warmth of the late 20th and early 21st century in the Northern Hemisphere is unprecedented in recent centuries, apparently that finding does not apply universally over longer timescales. According to the Summary of Policymakers from the IPCC Fourth Assessmnet Report: Average Northern Hemisphere temperatures during the […]

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  • 2012: The Year So Far

    • Date: 18/06/12

    In terms of global temperature 2012 is turning out to be a very interesting year. Monitoring this year’s temperature is however less thorough than for many years as the newly established Hadcrut4 database is still not updated beyond the end of 2010, and the dataset it’s replacing, HadCrut3, though still being updated by the University […]

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  • The Very Model Of A Modern Major Problem

    • Date: 14/06/12

    There has been some discussion about a paper in Nature Climate Change by Gleckler et al that says they detect “a positive identification (at the 1% level) of an anthropogenic fingerprint in the observed upper-ocean temperature changes, thereby substantially strengthening existing detection and attribution evidence.” What they’ve done is collect datasets on volume-averaged temperatures for the […]

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  • Climate History Books May Have To Be Re-Written

    • Date: 13/06/12

    Scientists have found compelling evidence that a meteorite storm hit the earth more than 12,000 years ago, and is likely to have been responsible for the extinction of a prehistoric people and giant animals including mammoths. In the cold period, known as the Younger Dryas, North American megafauna including mammoths and giant ground sloths disappeared […]

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  • Higher Than Expected Levels of Methane in California

    • Date: 12/06/12

    New research from Lawrence Berkeley National Laboratory (Berkeley Lab) has found that levels of methane—a potent greenhouse gas emitted from many man-made sources, such as coal mines, landfills and livestock ranches—are at least one-and-a-half times higher in California than previously estimated. Working with scientists from the National Oceanic and Atmospheric Administration (NOAA) Berkeley Lab scientists […]

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  • Plant Responses To Significant And Rapid Global Warming

    • Date: 12/06/12

    In an impressive and enlightening review of the subject, Willis and MacDonald (2011) begin by noting that key research efforts have focused on extinction scenarios derived from “a suite of predictive species distribution models (e.g., Guisan and Thuiller, 2005)” – which are most often referred to as bioclimatic envelope models – that “predict current and […]

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