This has been another disappointing year for global warming alarmists, which is why you haven't heard much about it in the media. Global temperatures lately haven't been co-operating with Al Gore's simplistic claim in An Inconvenient Truth that the Earth's temperature rises in automatic lockstep with increasing concentrations of man-made greenhouse gases. Based on that incorrect premise, there hasn't been any warming since 1998...
This year, preliminary estimates from the three leading agencies monitoring climate change, the British Meteorological Office (the MET), the U. S. National Oceanic and Atmospheric Administration (NOAA) and NASA's Goddard Institute for Space Studies, place 2008 as the 10th, ninth and ninth warmest year on record, respectively.
"On record" means from 1850 (the MET) or 1880 (NOAA and Goddard), a flash in the pan compared to the Earth's 4.5-billion-year climate history.
Predictably, few media have noted 2008 is well down the list of "record" warmth. By contrast, in early 2007 when the MET predicted 2007 would be the warmest year ever, it garnered international headlines.
As predictably, when the forecast turned out to be wrong, few media followed up. MET ended up classifying 2007 as the seventh warmest year on record, NOAA fifth and Goddard, tied for second. Now, 2008 has come in significantly cooler in each case.
Finally, there's no such thing as an annual "global" temperature. It's a statistical average based on complex calculations, done in different ways.
To be clear, the world's leading climate change monitoring agencies agree the Earth is warming abnormally due to mankind's influence based on 10-to-20-year temperature cycles and that either all or most of the warmest years on record have occurred in the past decade. However, global temperatures are also affected by natural factors, such as ocean currents, now said to be having a cooling effect. Someday, more media may realize you can't cherry pick information to fit the alarmist agenda, which most media subscribe to, and ignore everything else. But don't hold your breath.