AUS2200: a high-resolution limited-area modelling project for Australia

Le résumé fourni par la source

This paper documents AUS2200, a community-driven, high-resolution limited-area modelling project for Australia based on the Met Office Unified Model (UM) coupled to the Joint UK Land Environment Simulator to represent the land surface. Developed through a national partnership involving the Australian Research Council Centre of Excellence for Climate Extremes (CLEX), Bureau of Meteorology (BoM), National Computational Infrastructure (NCI) and Australian Earth System Simulator National Research Infrastructure (ACCESS-NRI), AUS2200 marks a significant advancement in limited-area modelling efforts in the Australian university community. AUS2200 features a convection-permitting configuration with 2.2-km grid spacing, covering the entirety of the Australian continent and portions of surrounding oceans. Its large domain at convection-permitting scales allows simultaneous resolution of both large- and small-scale atmospheric processes. This capability supports scientific investigations into key atmospheric phenomena, including multiscale interactions, across a broad range of spatial and temporal scales, from continent-wide systems to localised events, and across diverse climatic regions spanning the tropics to the mid-latitudes. This paper provides an overview of the AUS2200 project, detailing its overarching aims, modelling framework including model configuration and optimisation efforts, contributions to scientific research and community development, and future directions. Early results from collaborative, cross-organisational efforts to study diverse atmospheric processes and high-impact weather events, including the 2019–20 Black Summer bushfires and record-breaking extreme rainfall events, are also presented. These investigations are contextualised within the broader scope of seasonal and climate variability, highlighting the project’s importance for advancing scientific research and addressing broader societal challenges.

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