A few days ago I highlighted the drop in global temperatures as measured by satellite from UAH, the University of Alabama, Huntsville. They published their satellite derived Advanced Microwave Sounder Unit data set of the Lower Troposphere for May 2008 and it showed that it is significantly colder globally, colder even than the significant drop to -0.046°C seen in January 2008.
The global ∆T for UAH from April to May 2008 was -.195°C
RSS (Remote Sensing Systems of Santa Rosa, CA) RSS Microwave Sounder Unit (MSU) lower troposphere global temperature anomaly data by For May 2008 is published and has moved below the zero anomaly line, with a value of -0.083°C for a change (∆T) of -0.163 °C globally from April 2008.
2008 1 -0.070
2008 2 -0.002
2008 3 0.079
2008 4 0.080
2008 5 -0.083
I had predicted when I posted the UAH data that the RSS value for global temperature anomaly for the lower troposphere would end up around 0.05 to -0.15°C. Coming in at -0.083°C, I was on target.
This value is greater in magnitude than the drop seen in January 2008 to -0.07°C
click for a larger image
Reference: RSS data here (RSS Data Version 3.1)