Maybe you could read some of the original sources instead of putting out a bunch of "Just sayin'" questions into the world. Your questions are all answered in the original sources, at least once you've got enough background to read and understand their contents.

If you can't handle original sources, then the next best thing is probably to read Jeff Fleck, either one of his books such as "Science Be Dammed (How Ignoring Inconvenient Science Drained the Colorado)" or his blog at http://www.inkstain.net/fleck/

Its clear that you do not consider the evidence that is already present to be sufficient, so can I ask what kind of evidence you would want to see to help you believe?

This situation is causing real people real hardship. Fooling with numbers does not relieve any.

frank,

The article is not clear on what the 3 degree rise refers to, but looking at data on colorado river temperatures over time, they may be referring to that, as they have gone up about that much according to other sources. They are certainly not referring to global mean surface temperatures.