Overview and Application of High-resolution CESM Simulations

Sun-Seon Lee1, Axel Timmermann2, Christian Wengel1 and Jung-Eun Chu3, (1)IBS Center for Climate Physics, Pusan National University, Busan, South Korea, (2)Center for Climate Physics, Institute for Basic Science, Busan, South Korea, (3)City University of Hong Kong, School of Energy and Environment, Hong Kong, Hong Kong
Abstract:
To further improve our understanding of scale-interactions and key mechanisms leading to climate variability and extreme weather events, we conducted a series climate simulations using the high-resolution Community Earth System Model (HR-CESM). The HR-CESM configuration uses a horizontal resolution of approximately 25 km for the atmospheric component and 10 km for the ocean. The simulations were carried out under present-day radiative forcing and for a variety of future greenhouse gas scenarios. This presentation highlights some key features of these simulations: the overall performance and important model biases, the representation of the Atlantic Meridional Overturning Circulation, tropical cyclone statistics, properties of sea-ice, the El Niño-Southern Oscillation, as well as their responses to future climate change.
We will also present plans on how the data will be shared with the larger scientific community for further analysis and collaborative projects.
The simulations were run on the IBS/ICCP supercomputer Aleph with a model throughput of 3-4 years/day and a peak performance of ~1 PFlops.
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