NOAA came out with a report last week that contains the results of a review of climate date. Their study involved more than 300 scientists for 160 research groups. Money quote:
“Based on comprehensive data from multiple sources, the report defines 10 measurable planet-wide features used to gauge global temperature changes. The relative movement of each of these indicators proves consistent with a warming world.
For the first time, and in a single compelling comparison, the analysis brings together multiple observational records from the top of the atmosphere to the depths of the ocean,” said Jane Lubchenco, Ph.D., under secretary of commerce for oceans and atmosphere and NOAA administrator. “The records come from many institutions worldwide. They use data collected from diverse sources, including satellites, weather balloons, weather stations, ships, buoys and field surveys. These independently produced lines of evidence all point to the same conclusion: our planet is warming,”
What I like about the article is the rigorous adherence to the scientific method. It's apparent that they didn't set out to "prove their case". Instead, they did what scientists are supposed to do: they made predictions based on their hypothesis, then designed experiments or observations to test the predictions. In this case, all ten of their predictions supported the hypothesis. I have never seen a global warming denier take this approach.