The WMO recommends that data should be in 10 year periods and up to 2000 as the latest period, until the 2010 results are released.
If we look at the data from the 4 well respected indicators, HadCRUT, RSS, UAH, and GISS global temperature sets all show sharp drops in the last year. Also the last 10 years shows that 3 of the show a flat trendline.
The drop in Temperature from Jan 07 to Jan 08 is an average of -0.6405. Drop about another .5C, and we’re basically back to where we were in the mid-late 1800s when the Little Ice Age ended. January 2008 was cooler than January 1932, even after all the downwards adjustments they have applied to the old data.
http://wattsupwiththat.files.wordpress.com/2008/02/giss-jan08.png
http://wattsupwiththat.files.wordpress.com/2008/02/uah-monthly-anomaly-z.png
http://wattsupwiththat.files.wordpress.com/2008/02/rss-msu-2007-2008-delta.png
http://wattsupwiththat.files.wordpress.com/2008/02/hadcrut-jan08.png
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