On 8/11/07, Michael Madigan <[EMAIL PROTECTED]> wrote:
> The "Settled Science" of Global Warming isn't so
> settled after all.
>
> And here in NJ, we will tie or break another all-time
> low record temperature of 56 F for August 11.

And in other places there has been record highs.  Like most of central Europe.

> http://www.americanthinker.com/blog/2007/08/revised_temp_data_reduces_glob.html

This was posted on Slashdot which I think sums thing up nicely:

---------------
It's not really a Y2K bug in the conventional sense, and it has
nothing to do with Y2K software compliance. It's more like 2000
happened to be the year that the organization collecting the
temperature data in the USA changed their procedures for correcting
the data for the "time of day" that the temperature reading was taken.
This meant a slight difference between the pre-2000 dataset and the
2000-and-later dataset, which is the inconsistency correctly
recognized by the guy mentioned in the article.

So, it's merely a coincidence that the change happened to occur in
2000. It could have happened any other year. Referring to this as a
result of a "Y2K bug" is misleading. If it is, then anything that
changed in 2000 could be called a "Y2K bug".

I don't think demoting 1998 to the 2nd-highest US temperature in a
century (barely -- by 0.01 annual average degree) is a big deal
either. 1998 is an awfully close second. I also wouldn't ascribe much
to the the claim that "half" the top ten years in the US were before
WWII (1921, 1931, 1934, 1938). Last I checked, 4 is less than half of
ten :-) Two others were in the 1950s (1953, 1954), and the rest were
1990, 1998, 1999, and 2006. Perhaps this is merely indicating that, in
the US, lately it's been the hottest it's been since the "dust bowl"
years. That's not a pleasant thought.

The TOP 10 annual temperature years in the US are (celcius degrees from mean):

      year annual 5-year mean
1 1934 1.25 0.44
2 1998 1.23 0.51
3 1921 1.15 0.15
4 2006 1.13
5 1931 1.08 0.27
6 1999 0.93 0.69
7 1953 0.90 0.32
8 1990 0.87 0.40
9 1938 0.86 0.36
10 1954 0.85 0.47

If you look at the top ten ranking for the 5-year means, the pattern
is pretty clear:
1 2000 0.52 0.79
2 1999 0.93 0.69
3 2004 0.44 0.66
4 2001 0.76 0.65
5 1932 0.00 0.63
6 1933 0.68 0.61
7 2003 0.50 0.58
8 2002 0.53 0.55
9 1998 1.23 0.51
10 1988 0.32 0.51

The 1930s are down at 5th and 6th place. 2005 and 2006 are left out
because you can't calculate a 5-year window around them yet.

Finally, the error changes the GLOBAL pattern insignificantly, and the
global trend in the last couple of decades is greater than the USA
trend.

In all, it's a worthwhile error to catch for the US data, but it
doesn't change much about the overall pattern.

-- 
Paul


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