Approach taken in this article is different in the sense that it is not about biogeophysical aspect. Rather it is a fusion of economical and general circulation models. Authors have used statistical approach to know how changes in rainfall or extreme temperatures affect area
to be harvested for rice. That is followed by simulations using general circulation model (GCM) to know how rainfall and temperatures going to be changed by ABC and GHG. Using previously derived statistical parameters and GCM results conclusion is drawn that both GHG and ABC negatively impacts the rice production in India.
Article is free to download under open source and can be reached at following link
Auffhammer, M., V. Ramanathan and Vincent J. R. (2006), Integrated model shows that atmospheric brown clouds and greenhouse gases have reduced rice harvests in India, PNAS, 103(52), 19668-19672, doi: 10.1073/pnas.0609584104.
In the same issue of PNAS, a commentary on this article by Cramer is appeared, which can be reached at following link.
Cramer, W. (2006), Air pollutioin and climate change both reduce Indian rice harvests, PNAS, 103(52), 19609-19610, doi: 10.1073/pnas.0610075103.
Image source: Proceedings of the National Academy of Sciences, USA