If the average temp is x then the variance around it will be set by that average. If as has happened the average temp goes up a degree then ALL averages are going to be reflecting that 1 degree change. So citing that average temps are higher now then they were when the temp was lower mean nothing. That is common sense and reality. In the early 1900's the prediction was that over the century the temperature would rise by 1 degree. That is about what happened. Yet we are to run around with our heads lopped off because a 100 year old prediction came true. Our knowledge of climate and climate change is so poor we can only make guesses what will occur. Our knowledge of weather patterns and such are based entirely on OBSERVED data. We can estimate based on OBSERVED data what the weather will be like fort about 2 weeks. We base all our climate estimates for weather conditions like Hurricanes and such off OBSERVED data over time. We can not even get those estimates right on a monthly basis. Unless you can show a permanent spike in temps the fact that yearly averages are higher now then 10 or 20 years ago means absolutely nothing other then the fact our average temperature in fact went up about 1 and a half degrees. The only concern about that was the fact that about half a degree occurred in a 20 year period. And that stopped in 1998. And there still is no credible evidence that man caused that rise in temp. The claim made by some was that rising C)2 caused the temperature increase and that man was the reason for the CO2 increase. If that were in fact the case then from 1998 to present we would have seen about half a degree increase in world temperature Averages. And we have not. There is no functional factual theory that makes the temp increase man made.