I am sure that those who deny AGW hope that the Iceland volcano cools the earth from the very high global temperature that the earth is experiencing in 2010. Here is the latest graph from Dr Roy Spencer's blog.

It certainly looks like 2010 will be higher than the El Nino of 1998. I guess my University of East Bumcrack (cooler since 2000) T-shirt is now outdated.

Over at Climate Central, Rutgers University environmental sciences professor Alan Robock does not think that the volcano will have much of an effect.

“From what I’ve seen from the observations so far, there hasn’t been enough put into the atmosphere to have a large climate effect,” he said in a telephone interview.

The article goes on to say:

In addition to causing short-term cooling, volcanoes also contribute carbon dioxide (CO2) to the atmosphere, which in the very long-term balances slow CO2 losses from other causes. The volcanic contribution of CO2 to the atmosphere is estimated to be well less than one percent of the recent human contribution.

One thing that always confuses me is how those who deny AGW because man's contribution is too small, along with saying that the climate is not that sensitive - are always so quick to show how volcanoes affect the atmosphere via a single eruption.