I am one of the people that collects weather data from all over the world. But we send it to NASA to analyze it. NASA uses their satellites to fill in the blanks inbetween our ground weather stations and balloon launches. So I would say the data from the past few years have been really good.
What I wonder is if we reached a tipping point in 1980. The pollution or CO2/H20/CO/NO emmisions got to a point so high that the trees/grass/algee/whatever else that uses those gases as food couldn't keep up anymore. It will be interesting to see what happens in the next 10 years. Will environmental restrictions have any effect? Will the solar load from the Sun go down in a cycle? Will some volcano erupt sending tons of greenhouse gases into the atmosphere?