One possibility is that the situation will get so bad (either politically or economically) that the papers will be published openly.
Anyway, I keep hearing that most climate change research is based on incredibly complicated models that are entirely secret to the begin with - it's only the data from such models that are published.
Actually that's not the case. The code for the models (many of them) is available. You might want a supercomputer...
http://www.realclimate.org/index.php/data-sources/#GCM_code
