In order to examine the percentage of appearance of the typhoons which have the maximum wind speed in their navigable (left) semicircle, typhoons of 2001 through 2005 are statistically analyzed using the Japan Meteorological Agency Best Track and Mesoscale Analysis data. As a result, 31 % of all the typhoons are found to have the maximum wind speed in their left semicircle. The percentage tends to be higher with progress of season, reaching up to 44 % in October. It is moreover found that the percentage is greater for eastward-moving typhoons and for those with a traveling speed of over 40 km/h. These results indicate that the transition process of a typhoon to an extratropical cyclone is one of the main causes for the appearance of the maximum wind speed in the left semicircle. Thus, this paper finally suggests that caution should be exercised for the left semicircle of the typhoon which approaches to Japan in late autumn, moving eastward at a high speed.%本章では、T0423のような左半円に最大風速を有する台風がどの程度の割合で存在するかを、統計的に解析した。以下に得られた結論を列記する。
展开▼
机译：为了检查在其可航行的（左）半圆中具有最大风速的台风的出现百分比，使用日本气象厅的最佳航迹和中尺度分析数据对2001年至2005年的台风进行了统计分析。结果，发现所有台风中有31％在其左半圆处具有最大风速。随着季节的发展，这一百分比往往更高，十月份达到了44％。此外，还发现，向东移动的台风和行进速度超过40 km / h的台风的百分比更大。这些结果表明，台风向温带气旋的过渡过程是在左半圆出现最大风速的主要原因之一。因此，本文最后建议应谨慎对待深秋抵达日本并快速向东移动的台风左半圆。％本章では，T0423のような左半円に最大风速を有する台风にの程度の割合で存在するかを，统计的に解析した。以下に得られた一体られた列记する。
展开▼
