I can't speak to that particular impact, although my daughter works for this professor, so I can ask my daughter.
I want to refer to your question about whether there are alarmist statements in the IPCC report. I think at least three of the panellists here today contributed to that fourth assessment, and you have to realize it represents the work of almost 4,000 scientists who had to reach a consensus. Also, bureaucrats from more than 130 countries had to approve the report. Any time you get 4,000 people to agree on something, it has to represent a compromise. The major criticism I've heard of that report is that the statements are not alarmist enough.