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Re: Global warming? TEC (fixed the link)
Posted by AW on 5/09/08

    On 5/09/08, AW wrote:
    >
    > Here is an article and a link to more information that shows the
    > study over a much longer time period.
    >
    >
    > On 5/09/08, T.E.C. - Iowa wrote:
    >>
    >> Hey AW,
    >>
    >> Regarding your comment, “The chart spans only thirty years; hardly
    >> long enough to base an evaluation upon it.” The chart is only a
    >> visual that is trying to explain the difference between climate
    >> and weather. Thus it is too small for dealing with the whole
    >> issue of climate change.
    >>
    >> Yet, it does make the point (I posted the graph at the bottom).
    >> The blue trend lines show trends over an eight year period. Some
    >> of the line show an increase, some a decrease, and some little or
    >> no change at all. This means that eight years is NOT long enough
    >> to use in climate work. The span of time does NOT screen out the
    >> “noise.” In this case the noise is the normal variation caused by
    >> the weather.
    >>
    >> I say noise because it is clear with even a casual glance that the
    >> temperature is increasing across time on the graph. The idea that
    >> should come from the graph is that longer time periods are needed
    >> for climate research. Also, if you read the article I linked to,
    >> Dr. Kevin Trenberth sums it up with the comment, “Too many think
    >> global warming means monotonic relentless warming everywhere year
    >> after year. It does not happen that way.”
    >>
    >> PS: A better question would be, “What would be the minimum number
    >> of years that might be used in climate work?”

    NOAA (click here)

     
     

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