風船爆弾の気象学的原理
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概要
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As the appropriate level for the balloon bombs 10-12 km level has been selected, for the level is the barotropic surface with maximum westerly currents. During the winter 1944-1945, many balloons were sent to United States from Japan, for this period is characterized by heavy baroclinicy in the middle latitudes and hence the greatest strength of the westerlies is found in winter. Two or three days will be enough to send balloons through the upper troposphere, if the conditions are favourable.
- 社団法人 東京地学協会の論文