局地気象の数値シミュレーション(環八雲の再現計算を例に)(<小特集>流れの複合問題)

概要

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This study tries to simulate local climates near around Kanto Area under realistic meteorological conditions by using the most advanced meteorological prediction techniques (four dimensional data assimilation method and multi-nested grid system) coupling with detailed geographical data and anthoropogenic heat emission data. Multi-nested grid system enable us to analyze smaller scale climate in high resolution and larger scale synoptic climate in rough resolution interactively at the same time. "Kanpachi Street Clouds", the strange cloud line generated just over the Kanpachi street, can be well simulated by these methods. Some results of the numerical experiments controlling the ground surface conditions show that the position and the strength of this local cloud lines are affected by Heat Island near Tokyo metropolitan area.
1998-09-15