Could climate change create 120million refugees in South Asia?

One report states that 120million people in South Asia could be forced from their homes by the end of the century:

http://news.bbc.co.uk/1/hi/world/south_asia/7313239.stm

In parts of the world, people have already been forced to move by climate change:

http://www.guardian.co.uk/environment/2005/nov/25/science.climatechange

http://www.theecologist.org/archive_detail.asp?content_id=1100