Firefox 3 RC2 recommended...UAH MSU have released their new satellite data for May 2008. The global anomaly was -0.17 °C, the coldest reading after January 2000 and the third coldest monthly figure after September 1993.
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Yes, I mean that anomaly-wise, the May was even colder than all the cool months of 2008, despite the dramatically weakening La Nina that now seems likely to change to ENSO neutral conditions this month. For example, the month-on-month cooling from April 2008 was by 0.19 °C while May 2008 was more than 0.75 °C cooler than January 2007. See the trend since January 2007 above.
The average anomaly for the first five months of 2008 is negative. 1994 was the last year whose average annual anomaly was negative.
Regional details
The month-on-month cooling included both hemispheres - by 0.21 °C on the NH and by 0.17 °C on the SH. Also, it covered the ocean as well as the land (on both hemispheres) pretty symmetrically.
The middle troposphere reveals a similar recent cooling trend. In some cases, it is not just recent. For example, the warming trend for the Southern Hemisphere during the last 30 years is 0.00 °C per decade while the warming trend for the troposphere above the world's ocean is 0.03 °C per decade, about 15 times slower than the IPCC-predicted trend. The middle troposphere is where the greenhouse theory predicts the most rapid warming.
The Sun
The Sun has been spotless at least for 9 days. The standardized May sunspot number was 2.9, equal to April, and the solar flux was even slightly lower than in April, namely 68.4.
See Anthony Watts' comments about the monthly data.
RSS MSU
RSS MSU confirmed the cooling. May's anomaly of -0.08 °C was also the coldest figure since January 2000.
UAH MSU: May 2008 cooler than April by 0.19 °C
Reviewed by DAL
on
June 03, 2008
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Reviewed by DAL
on
June 03, 2008
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