[GJM] Global Surface Temps Exaggerated by 100%

[robert searle]

--- "JunkScience.com" <junkman at junkscience.com> wrote:

> 
> 
> JunkScience.com
> 
> December 4, 2007
>
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> 
> Global Warming Since 1980 exaggerated by 100%
> 
> JunkScience.com, December 4, 2007
> 
> 
> The temperature trend over land between 1980-2002 is
> estimated to exaggerate global
> warming during that time by 100%, according to a new
> paper by Ross McKitrick and
>  Pat Michaels published in the Journal of
> Geophysical Research-Atmospheres (December
> 2007).
> 
> 
> McKitrick and Michaels write:
> 
> 
> [We] have concluded that the manipulations for the
> steep post-1980 period are inadequate,
> and the global temperature graph showing warming is
> an exaggeration, at least in
>  the past few decades. Along the way I have also
> found that the UN agency promoting
> the global temperature graph has made false claims
> about the quality of their data.
> The graph comes from data collected in weather
> stations around the world. Other 
> graphs come from weather satellites and from
> networks of weather balloons that monitor
> layers of the atmosphere. These other graphs didn't
> show as much warming as the 
> weather station data, even though they measure at
> heights where there is supposed
> to be even more greenhouse gas-induced warming than
> at the surface. The discrepancy
> is especially clear in the tropics.
> 
> The surface-measured data has many well-known
> problems. Over the post-war era, equipment
> has changed, station sites have been moved, and the
> time of day at which the data
> are collected has changed. Many long-term weather
> records come from in or near cities,
> which have gotten warmer as they grow. Many poor
> countries have sparse weather station
> records, and few resources to ensure data quality.
> Fewer than one-third of the weather
> stations operating in the 1970s remain in operation.
> When the Soviet Union collapsed
> in the early 1990s, more than half the world's
> weather stations were closed in a
>  four year span, which means that we can't really
> compare today's average to that
> from the 1980s.
> 
> Read a back ground summary...
>
[http://rs6.net/tn.jsp?e=001ymUh9V0R72LNh8aZFayxwf9WmJPBnN-ygwEDOp9-DKf9T9Ml2Fg0wrlOPD1TuE2Uo_N8pBIGSjq_fpqQiRPUZMlnsfwajLgQisVkeo4vHIBIR1-_H0-0WdhMKS9PPRSTyBz7hNVvirodSWchiCWDxhl3jlzLRDjx]
> 
> Read the paper...
>
[http://rs6.net/tn.jsp?e=001ymUh9V0R72K7Be0GxgfqVJwfuKZzjIsrYQKF9zywuFzTquuDyNwtFdO0OdXw8vMtShZ-KQZKrW1PR-vVGCnrY3P4D-Xjz1RqDGNO9ka1sTOjxTCcEQu-FGEF0WMbag9bdPYRMcs5WbpT7cxqEoJsjg==]
> 
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