March temperatures hold a surprise. While temperatures in the Southern Hemisphere and tropical latitudes have continued the year-long cooling trend, Northern Hemisphere temperatures have rebounded sharply. The figure below shows the temperatures since 2006, and the latest lower troposphere temperatures from RSS MSU.
Temperatures in the NH have gone north while SH temps have gone south. Overall the global temperatures have slightly increased. Looking back over the RSS record, the difference in temperatures between the hemispheres is the greatest since recording started in 1979.
The divergences between hemispheres appear to have increased in the last few decades. Does the divergence suggest a cold winter for the Southern Hemisphere in 2008? Perhaps the SH can expect a winter like the extreme NH winter. Perhaps the recent wild storms in southern Australia were only the beginning?