Central Weather Administration Next generation weather forecasting

The Central Weather Administration is the government meteorological research and forecasting institution of Taiwan. The agency’s mission is to make thorough meteorological observations, refine meteorological forecasts, create diversified meteorological services, and support disaster prevention and mitigation as well as promoting economic development promotion.

Extreme weather events, catastrophic cold spells, and floods have caused significant damage in Taiwan over recent years. “Our terrain is complex,” explains CWA Administrator Cheng, Chia-Ping (程家平). “Taiwan is at the junction of the continent and the ocean so there are many disastrous weather conditions like typhoons, heavy rains, and summer heat waves that impact us. That means accurate weather and climate information are vital. As such we need state of the art equipment, high resolution data, and world-leading computing power.”

Executive Yuan, the executive branch of the government of Taiwan, has invested in the Meteorological Information Smart Application Project, with the aim of strengthening the connection between meteorological information and government, industry, and people’s daily lives. The initiative seeks to provide the government and the public with real-time and precise meteorological information to achieve disaster prevention and reduction, address climate change vulnerability, and minimize the impact on the environment.

CWA initiated a project to replace the Fujitsu PRIMEHPC FX-100 system, used in current operations since 2012, with a sixth-generation high-performance computing system. The system is a Fujitsu FX1000 high-speed computer built with 7-nanometer chips made by Taiwan Semiconductor Manufacturing Co. It has achieved a computing performance of 10 PFlops, making it the fastest supercomputer in Taiwan.

The system is primarily based on Fujitsu’s supercomputer “FUJITSU Supercomputer PRIMEHPC FX1000” hardware, which features the same A64FX CPU as the supercomputer Fugaku, jointly developed by RIKEN and Fujitsu. The system has a total performance capacity that is seven times greater than the CWA’s fifth-generation system.

The new system will help mitigate the threats posed to Taiwan by extreme weather, and enable the CWA to promote advanced weather observation, improve forecast accuracy of weather disasters, and better analyze the long-term impacts of climate change. For example, the CWA can produce typhoon forecasts 10 days before their arrival. Under the old system, the agency could only begin making forecasts about tropical storms and typhoons seven days ahead,

“With the use of a sixth-generation high-performance computer, we estimate that the horizontal resolution would be improved to 1km compared with 3km under the previous system. The accuracy of weather and climate forecasts in countries around Taiwan would also be enhanced, with the resolution for the global weather model being improved to 13km from 25km previously,” explains Cheng, Chia-Ping.