Who are these "thousands of climate change experts"?

Excerpt from this article:

JAKARTA, Indonesia - Thousands of climate change experts from throughout the world are gathering in Bali to start the politically tortuous process of turning new scientific evidence about the perils of climate change into policy to act on the problem.

If you do some reading on the gathering in Bali, you should pretty quickly figure out that the 10,000+ people working on policy are mostly bureaucrats, political activists, etc, rather than people who could reasonably be called "climate change experts".

I would bet a large sum of money that very few of the attendees could formulate an intelligent answer to this fundamental question:

Can you articulate specifically why you believe that altering one ten-thousandth of our atmosphere is likely to result in catastrophic warming of the planet?

In your answer, I'll be looking for things like references to actual evidence, data, logic, etc.

Another snippet from the above article:

The problem with climate change is it's very long term," he [Agus Purnomo] said. "You can mobilize for something sudden, like a tsunami. With climate change, the adaptation is gradual," he said.

Ok, so we can easily adapt to a surprise 20-foot tsunami, but we can't reasonably cope with a one-foot sea level rise spread over an entire century?