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This paper studies relationship between typhoon and El NiñoㆍLa Niña events by using 25 years meteorological data of KMA and JMA. The results are listed below. Annual mean number of typhoon's occurrence in El Niño event year is 23.9, and that in La Niña event year is 24.9. The number of typhoon's occurrence decreases in El Niño event year. Mean central minimum pressure and mean maximum wind speed in El Niño event year are 959.3hPa and 35.8m/s, and those in La Niña event year are 965.5hPa and 33.7m/s respectively. Intension of typhoon is stronger in El Niño event year than La Niña event year. To be more specific mean central minimum pressure is lower 6.2hPa and mean maximum wind speed is stronger 2.1m/s. This result is closely connected with sea area of typhoon's occurrence. Typhoons in El Niño event year are more likely to occur in east of 150E and south of 10N, but those in La Niña event year are more likely to occur in 120-150E and north of 20N. Typhoons which occur in east of 150E and south of 10N can be stronger because the typhoons move in broad sea area of high sea surface temperature in western North Pacific. |
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