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and do the quality standards alter validity of readings?
Absolutely. The point is that the idea of the issue being "settled" is completely false. The basic data stream is FAR from reliable.
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NASA’s GISS uses a melding of surface thermometer readings around the world to create a global temperature anomaly. And the UAH uses satellites to measure temperatures of the lower or near-surface troposhere. Each thinks it has the better methodology (with, oddly, NASA fighting against the space technology). But they are giving us different answers.
For October, the GISS metric is showing the hottest October on record, nearly 0.8C hotter than it was 40 years ago in 1978 (from here).
However, the satellites are showing no such thing, showing a much cooler October, and a far smaller warming trend over the last 40 years (from here)
http://www.climate-skeptic.com/2008/11/this-is-getting-absurd.html
Temp measurements are, again, derived from algorithms that interpret information obtained by a sensor. Who is writing those algorithms and their accuracy is something that needs to be established. From what I have seen, it has not.
All this amounts to one big guess, and with billions in research money out there, that guess will go the way of being alarming.
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“NOAA’s Fiscal Year budget request for 2009 of $4.1 billion is 5 percent above Fiscal Year 2008 enacted levels of $3.9 billion.
“Almost this entire increase, though, goes toward funding the cost overruns in the troubled weather and climate satellite acquisition program.
http://cantwell.senate.gov/news/record.cfm?id=297315