One aspect of the climate change debate that most surprises my students is the fact that historical temperatures have been adjusted downward, which if course makes current temperatures appear higher by comparison. That's why we have so many records reported in the media.
In this case, we see the comparison between British measurements of global temperatures. The older one, Hadcrut3, shows lower historical temperatures than the newer one, Hadcrut4. The Met Office claims 2014 is the hottest year on record, but their adjustments to historical temperatures are ten times the amount of the so-called record. IOW, if they didn't adjust historical temperatures downward, we'd be nowhere near a record high year in 2014.
This entry was originally posted on NOT A LOT OF PEOPLE KNOW THAT
In this case, we see the comparison between British measurements of global temperatures. The older one, Hadcrut3, shows lower historical temperatures than the newer one, Hadcrut4. The Met Office claims 2014 is the hottest year on record, but their adjustments to historical temperatures are ten times the amount of the so-called record. IOW, if they didn't adjust historical temperatures downward, we'd be nowhere near a record high year in 2014.
This entry was originally posted on NOT A LOT OF PEOPLE KNOW THAT
Records & Adjustments
DECEMBER 4, 2014
By Paul Homewood
While the Met Office tell us that that global temperatures for 2014 are running 0.01C above the previous record (with an error margin of 0.1C!), we should remember how much their temperature data has changed over the last few years.
[The latest update of the old V3 is only up to May 2014]
In their Hadcrut V3, 1998 was 0.07C warmer than 2010, but is now shown as 0.02C cooler, a turnaround of 0.09C. Current year numbers, at least up to May, have been similarly inflated.
So, the adjustment is nearly ten times the amount by which the old record is claimed to have been beaten by!
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