Graphical Abstract

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Murata, A., S. I. Watanabe, H. Sasaki, H. Kawase, and M. Nosaka, 2019: The development of a resolution-independent tropical cyclone detection scheme for high-resolution climate model simulations. J. Meteor. Soc. Japan, 97, 519-531.
https://doi.org/10.2151/jmsj.2019-035   Graphical Abstract with highlights

Plain Language Summary: A new method for detecting tropical cyclones in high-resolution climate model simulations is proposed. The proposed method utilizes a two-dimensional scatterplot based on two quantities that represent the radial gradient and the tangential asymmetry of mid-to upper-level thickness around a simulated vortex. A comparison between the modeled and observed tropical cyclones over a part of the western North Pacific near Japan shows promising results. The detection method is only weakly dependent on the horizontal resolution.

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Highlights:

• A new method for detecting tropical cyclones in high-resolution climate model simulations is proposed.
• A comparison between the modeled and observed tropical cyclones using the non-hydrostatic regional climate model (NHRCM) with 20-km grid spacing under reanalysis-driven boundary conditions for one year revealed that no cyclones are missed and there is only one false alarm over a part of the western North Pacific near Japan.
• A comparison of the results obtained from datasets with 5-km and 20-km grid spacing demonstrated that the proposed method is only weakly dependent on the horizontal resolution.