4:00 PM - 4:15 PM
[ACG30-13] Future changes in the baiu precipitation region obtained by HighResMIP
Keywords:baiu, HighResMIP, future change
From June to mid-July, zonal precipitation called the baiu precipitation region extends from central China to Japan. Recently, climate change associated with global warming has been the focus of much attention, and it is important to clarify future changes in this baiu precipitation region. However, climate models are often used to predict future changes, and the results of future projections are influenced by which climate model is used and the resolution of that climate model. The purpose is to investigate the spatial resolution dependence among multiple models by comparing the nine high-resolution coupled models participating in HighResMIP at low and high resolutions to examine future changes in the baiu precipitation region in June (defined as 2021-2050 minus 1971-2000). Significant differences were not found in the historical precipitation among climate models or spatial resolutions, but future precipitation changes showed differences among resolutions, with precipitation increasing in the East China Sea at low resolution and decreasing at high resolution. The results of the 90th percentile values for future changes in maximum precipitation showed differences among the models, with HadGEM-GC31, which has a high ocean resolution of 25 km, showing particularly large values over western Japan and Kuroshio.