And happily, informal communication and message boards matter more than you would think!
Also, the published papers reporting these studies are all easily available. I highly advise reading them for yourself.
I don't have direct experience with climatology, but from what I understand it's somewhat similar: conferences like AGU are really important to climatologists for that reason.
Edit to acknowledge: obviously a lot of work gets done informally during conferences as well.
But it's in the service of publishable research, is it not? I don't think many scientists are going to say, "I'm changing my research program based on something I read on Hacker News yesterday." There's a bar for serious consideration.
edit: misspelling
I stand by the importance of published work in scientific discourse, but I apologize to schoper for taking a personal shot that was not called for.
I would just point out that scientific debate occurs through published papers and conference presentations, not programming message boards. I hope that you are publishing in those channels if you feel you have substantive contributions to this kind of research.