Using a one-level numerical diagnostic model, the features of surface wind fields in Hainan Island and Leizhou Peninsula and maritime area around it are studied. In the experiments with prevailing synoptic situation f...Using a one-level numerical diagnostic model, the features of surface wind fields in Hainan Island and Leizhou Peninsula and maritime area around it are studied. In the experiments with prevailing synoptic situation for varying seasons there are obvious deflection flows, terrain slope drafts, convergence lines, sea/land breeze and mountain/valley breeze, and difference in season accounts for the features found in the mesoscale distribution.The complex terrain and seatland distribution in the area is shown to be the important cause for the formation of varying mesoscale circulation, and close relationships between local climatic distribution feature and mesoscale circulation are then revealed.展开更多
In the light of the function and characteristics of the Dawning-1000 paral- lel computer made in China, we designed the parallel calculation scheme of the MM4 mesoscale numerical model. Because of the technological pr...In the light of the function and characteristics of the Dawning-1000 paral- lel computer made in China, we designed the parallel calculation scheme of the MM4 mesoscale numerical model. Because of the technological processing and meticulously remaking of the data organization and program flow of the sequential program, it reaches reliable calculation results and the SPEEDUP ratio rises obviously at last. When sixteen processing nodes are used, the SPEEDUP ratio reaches 1:6.7. In finite region, the model needs only less than 30 minutes to integrate 36 hours, and the operational parallel calculation environment for application of MM4 mesoscale model is preliminarily set up.展开更多
文摘Using a one-level numerical diagnostic model, the features of surface wind fields in Hainan Island and Leizhou Peninsula and maritime area around it are studied. In the experiments with prevailing synoptic situation for varying seasons there are obvious deflection flows, terrain slope drafts, convergence lines, sea/land breeze and mountain/valley breeze, and difference in season accounts for the features found in the mesoscale distribution.The complex terrain and seatland distribution in the area is shown to be the important cause for the formation of varying mesoscale circulation, and close relationships between local climatic distribution feature and mesoscale circulation are then revealed.
文摘In the light of the function and characteristics of the Dawning-1000 paral- lel computer made in China, we designed the parallel calculation scheme of the MM4 mesoscale numerical model. Because of the technological processing and meticulously remaking of the data organization and program flow of the sequential program, it reaches reliable calculation results and the SPEEDUP ratio rises obviously at last. When sixteen processing nodes are used, the SPEEDUP ratio reaches 1:6.7. In finite region, the model needs only less than 30 minutes to integrate 36 hours, and the operational parallel calculation environment for application of MM4 mesoscale model is preliminarily set up.
