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New global temp numbers released
Posted by: McQ on Wednesday, June 04, 2008

While Congress debates global warming and what to do about it, Anthony Watts reminds us of the latest findings:
Confirming what many of us have already noted from the anecdotal evidence coming in of a much cooler than normal May, such as late spring snows as far south as Arizona, extended skiing in Colorado, and delays in snow cover melting in many parts of the northern hemisphere, the University of Alabama, Huntsville (UAH) published their satellite derived Advanced Microwave Sounder Unit data set of the Lower Troposphere for May 2008.
You can go to Watt's site for the numbers, but their significance is this:
Compared to the May 2007 value of 0.199°C we find a 12 month ?T is -.379°C.

But even more impressive is the change since the last big peak in global temperature in January 2007 at 0.594°C, giving a 16 month ?T of -0.774°C which is equal in magnitude to the generally agreed upon “global warming signal” of the last 100 years.
Is anyone in Washington paying the least bit of attention to this?
 
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Is anyone in Washington paying the least bit of attention to this?
As if you need to actually ask that question out loud... :)
 
Written By: Scott Jacobs
URL: http://
Heh ... yes, indeed, if you ever wanted an example of a true rhetorical question, that’s it.
 
Written By: McQ
URL: http://www.QandO.net
Good to see my alma mater on the blog.
 
Written By: Is
URL: http://
So, it’s cooler in May. So what?

Single years, or even a number of years are just meaningless noise. Global warming and cooling takes place on multidecadal time scales. Anything less than a 20-year trend is essentially statistical noise.

It’s interesting, perhaps, but it proves absolutely nothing. You’re comparing a long-term moving average temperature (the "global warming signal" of the last 100 years), with a single year-over-year temperature reading. I really don’t see what your point is.
 
Written By: Dale Franks
URL: http://www.qando.net
Single years, or even a number of years are just meaningless noise. Global warming and cooling takes place on multidecadal time scales. Anything less than a 20-year trend is essentially statistical noise.

It’s interesting, perhaps, but it proves absolutely nothing. You’re comparing a long-term moving average temperature (the "global warming signal" of the last 100 years), with a single year-over-year temperature reading. I really don’t see what your point is.
Keep in mind there is a difference between surface temperature data and tropospheric data. But, to address your multidecadal time scale comment, no net warming is shown in this data set over the past two decades. In fact, over your suggested significant timescale, there was a very slight cooling. There was an even more significant cooling if one only goes back 10 years to 1998. Of course, this single decade is not a significant enough portion of time from which to draw a conclusion per your comment. So, I suppose the 20 year trend should do.
 
Written By: Is
URL: http://

 
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