Just as they do every month and just in time for the opening of the United Nations' Copenhagen climate change conference, University of Alabama at Huntsville climatologists John Christy and Roy Spencer are reporting the latest global temperature trends from satellite data. Below are the newest data updated through November, 2009.
Latest Global Temperatures
The global-average lower tropospheric temperature anomaly rebounded from +0.29 deg. C in October to +0.50 deg. C in November (emphasis his.) Both hemispheres, as well as the tropics, contributed to this warmth. The global anomaly for November of +0.50 deg. C is a period record for November (since 1979); the previous November high was +0.40 deg C. in 2005.
Go here for the data on which the above chart is based. The global average temperature is increasing at +0.13 degrees Celsius per decade. The northern hemisphere is warming at +0.19 degrees per decade and the southern hemisphere is warming at +0.06 degrees per decade. Interestingly, the satellites show that the north polar region is warming at +0.43 degrees per decade and the south polar region is cooling at -0.06 degrees per decade.