Abstract
The Earth Simulator is now in its fourth year of operation. The primary object of the Earth Simulator project is to contribute to research on global environmental change. In September of 2004, three Japanese research groups submitted the results of global warming simulations performed on the Earth Simulator to the IPCC (Intergovernmental Panel on Climate Change). Collaborations with the industrial societies were started. For example, collaborations are underway with the automobile and aircraft industries. In this report, details of the Earth Simulator operation during the past three years are described. The LINPACK benchmark test is worldwide-known as the world ranking of super-computers. However, there are arguments in America that this does not reflect well the performance of actual applications. I will report on collaboration between the Earth Simulator Center and the NERSC group to study this issue by comparing the performances of several US actual application codes.
