CASE STUDY OF THE STRUCTURE AND FORMATION OF A HEAVY-RAIN BAND

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概要

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• A case study was made of the structure and formation of a heavy-rain band, in which most of the rainfall was produced in just four hours and more than 150 mm was concentrated in a narrow area 20 km wide and 80 km long. The following conclusions were reached after analysis in detail of the horizontal distribution of the intensity of the rainfall and PPI radar-echo patterns. The heavy-rain band consisted of seven to eight cumulonimbus clouds aligned at intervals of 30 to 50 km in the direction of the prevailing wind at middle levels and travelling in the same direction. These cumulonimbus clouds formed over a limited area of the Kii Peninsula and produced their most intensive rainfall in the heavy-rain band after more than two hours of movement. Formation of the heavy-rain band is discussed based on the results of our analysis.

著者

• Takeda Takao

  Water Research Institute Nagoya University

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