Recent Development of Climate Models by using the Earth Simulator


Akimasa Sumi

Professor, Director of Center for Climate System Research

University of Tokyo


The Earth Simulator (ES) is the fastest computer in the world, which has 640 nodes. Each node has 8 processors of GFLOPS and 16 GByte memory. Its catalogued speed is about 40 TFLOPS. Since 2002 March, this machine has become available for us and surprisingly it is working very well. Many efforts have been conducted to make a maximum use of the capability. Three examples for developing a new model for the ES are presented in this report.

(1) The high resolution climate model for global warming has been developed jointly by CCSR-NIES-FRSGC consortium. An atmospheric part is T106L56 and an oceanic part is a 1/4 x 1/6 L48 model. It has a river run-off model. So far, the coupled model has been successfully developed and tested.

(2) As for AGCM, T682 global atmospheric model has been developed by JMA( Japan Meteological Agency). It is demonstrated that much better forecast will be given by using a high resolution global.

(3) As for the non-hydrostatic regional model, its application to wider area is desirable. For example, JMA has made a test of 12 hour forecast over the 2000km x 2000km domain by using 1km non-hydrostatic model. This model shows a remarkable possibility of a short-range forecast.




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