Abstract Storm‐resolving models have the potential to outperform conventional models with a horizontal resolution of 150 km in simulating global atmospheric circulation by resolving deep convection and gravity waves. Recent studies have suggested that the long‐standing “too zonal and too equatorward” storm‐track bias in climate models can be mitigated by enhancing the horizontal resolution. This study investigates the horizontal structures of storm tracks using multiple global storm‐resolving models with a resolution of 5 km or finer under a realistic land‐sea configuration focusing on the winter of 2020. Storm‐resolving models substantially mitigate the long‐standing storm‐track biases in the lower‐tropospheric North Atlantic, but appear to introduce a northward‐displacement bias in the upper troposphere. In contrast, the long‐standing biases remain in the North Pacific, with only marginal improvements. These results highlight the importance of considering regional and vertical characteristics of storm tracks to reduce their biases in climate models.
Masunaga et al. (Sat,) studied this question.