One of the most exciting promises of Computational 
                Grids are their ability to execute “virtual applications”, 
                ones that involve more than one applications spanning multiple 
                organisations. This increases computing power for complex analysis 
                whilst appearing to be a single application. The Distributed Atmospheric 
                Science (DAS) project, which is funded by GrangeNet and commenced 
                in January 2005, plans to explore issues associated with these 
                virtual applications.
                In order to allow virtual applications to be built:
				
				
                -  The network performance between the organisations must 
                  be comparable to performance within an organisation;
                         -  Middleware must mask the heterogeneity of the underlying 
                      platform technologies, such as differences in operating 
                      systems, security policies, resource configuration, etc 
                      and
                 -  Software tools and development environments must be 
                  created to allow rapid specification and creation of virtual 
                  applications, particularly where legacy codes are involved.
				  
 
				   				  
                
                Leveraging off the DSTC funded Nimrod/G and the ARC funded 
                  GriddLeS projects, the DAS project team is exploring current 
                  challenges in building a virtual atmospheric sciences application. 
                  The team will deploy three existing atmospheric science models 
                  across GrangeNet which, when combined, can provide detailed 
                  air pollution control strategies to be performed under a variety 
                  of different climatic and weather conditions 
                GrangeNet is a Government funded high performance research 
                  network that provides the enabling technology for the development 
                  of grid and advanced communications services. 
                More information at:
                
www.csse.monash.edu.au/~davida/griddles
                www.grangenet.net