"Abstract details
Response of Indian Subcontinent to the Geoengineering of Climate: The effect of SRM on Cloud Area Fraction and Rainfall
P. Arora (1) ; SK. Mishra (2)
(1) IIT Delhi, Civil Engineering, New Delhi, India; (2) IIT Delhi, Centre for atmospheric sciences, New Delhi, India
Abstract content
The objective of this paper is to study the effects of Solar Radiation Management (SRM) on the climate over the Indian Subcontinent, particularly how it changes the cloud area fraction and total precipitation over the region. Cloud area fraction and precipitation are highly model sensitive parameters which depend greatly on other parameters like surface air temperature and evaporation. These parameters play a major role in governing small and large scale weather activities in any area and a small change in them can trigger repercussions on a much larger scale. As such it becomes extremely important to analyze closely the effects of SRM on our climate before implementing it in reality. The data for five important and interdependent variables: cloud area fraction, total precipitation, precipitable water, evaporation and surface air temperature was studied exhaustively for nine models namely BNU-ESM, CCSM4, CanESM, CAM5.1, GISS-E2-R, HadGEM2-ES, IPSL-CM5A-LR, MIROC-ESM and MPI-ESM-LR, for a period of 50 years and the graphical results for the changes in these parameters was plotted using NCAR Command Language (NCL). The results obtained from these plots were indicative of the fact that cloud area fraction and precipitation, particularly over the Indian Subcontinent, are indeed highly model sensitive parameters; where a small change in the solar radiation caused changes as high as 30% in these parameters. With the given uncertainty in the simulated parameters, it becomes crucial to have more robust modeling before implementing any decision, particularly for a country like India where the economy is largely driven by monsoon dependent agriculture and even a small change in the climate can affect severely the livelihood of millions of people. Therefore any decision, big or small, must be pondered upon carefully, to analyze the risks and the benefits being derived from it, before implementing it on a local, regional or global scale."
http://www.commonfuture-paris2015.o...tm?Zoom=bca704b28724bff6a5fb3eb8db55392eFrom the website:
Our Common Future Under Climate Change
International Scientific Conference
7-10 JULY 2015 Paris, France
