Wintertime extratropical cyclone frequency around Japan |
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| Authors: | Masaru Inatsu Kazutaka Terakura |
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| Institution: | 1. Graduate School of Science, Hokkaido University, Sapporo, Japan
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| Abstract: | Data analysis and regional atmospheric model (RAM) experiments revealed key factors in the control of wintertime cyclone passage routes from Northeast Asia to the western North Pacific. The cyclone routes were independent of the global flow pattern in the interannual variability, while cyclone growth closely agreed with linear baroclinic theory. The RAM experiments with a different lateral boundary condition composed of a combination of monthly mean and transient components also showed that the upstream eddies are important for the track route, but the background states are not. Additionally, the RAM experiments showed that the mean flow controlled the growth rate of cyclones. |
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