b) The complexity is such that its "proof" has to rely on a heavy dose of "an appeal to authority."
The bottom line is that perhaps these two efforts (excessive simplification and an appeal to authority) need to be revisited, and perhaps jettisoned...
On a slightly different tack, one effect of the mounting criticisms is that the scientists and those who accept the consensus view are feeling justifiably beleaguered, and thus inclined to 'circle the wagons" in defense! This would be a mistake on their part, and counterproductive. They need to develop a new narrative and explanation as mentioned above, and also jettison the IPCC chair. There already were sufficient grounds to question his fitness for the position (e.g. see here) and now things are getting worse, with additional questions being raised regarding his credibility and actions and activities, see Climate chief was told of false glacier claims before Copenhagen and UN climate chief Rajendra Pachauri 'got grants through bogus claims'
Previous related blog entries:
Climate change and doubt - Jan 24th, 2010
Meet Dr. Rajendra Pachuri - Jan 23rd, 2010
We wuz wrong - Jan 23rd, 2010