USTC fills many blanks in atmospheric numerical simulation in the new generation of Shenwei supercomputing platform

According to the official news of the University of Science and Technology of China, recently, the University of Science and Technology of China has achieved the first 7-day full coupling of atmospheric physics and chemistry with a global spatial resolution of 3 kilometers on the new generation of Shenwei supercomputers. The numerical simulation test fully demonstrated the reliability, stability, and availability of a new generation of domestic supercomputer software and hardware systems, as well as the major application prospects of building a global high-resolution atmospheric simulation system on it.

According to reports, atmospheric numerical simulation is a key method to study and predict severe weather events, but there are still large forecast deviations. Atmospheric numerical models need to include many complex physical and chemical processes to reflect the important impacts of human activities and the high development of global urbanization on the atmospheric system.

The research work is based on a new generation of domestically produced Shenwei supercomputing platform and has developed a global high-resolution non-static equilibrium atmospheric numerical model iAMAS that includes the evolution process of atmospheric components. Operational timeliness and many other aspects have filled the blank of atmospheric numerical simulation at home and abroad.

Finally, when the scale of the numerical simulation experiment was expanded to nearly 40 million processor cores (about 600,000 core groups), the parallel efficiency remained at 76.2%, and the simulation of 0.82 per hour was achieved in the scenario of frequent large-scale data reading and writing. At the speed of days, the efficient numerical simulation test of the global 3 km atmospheric physical-chemical coupling has been achieved, reaching the international leading level.

The research results have been published in the " Science Bulletin ". Professor Zhao Chun and Professor An Hong are the co-corresponding authors of the paper, master students Gu Jun and Fang Tao, and doctoral students Feng Jiawang and Hao Xiaoyu are the co-first authors.

In the future, the research team plans to further optimize the atmospheric model, improve its computational efficiency and stability, and couple it with the high-resolution Earth system model, so that long-term high-resolution climate simulation experiments can be carried out to explore the laws of climate change and its impact on human beings. Influence and serve the country's "dual carbon" strategy.

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