Abstract
The impacts of Southern Oscillation on climate are widespread and extend far beyond the tropical Pacific. However, the concrete influence is not so clear, especially in middle to high latitudes, including Japan. In this study, the correlation between monthly values of on one hand Southern Oscillation Index (SOI) and on the other hand normally standardized precipitation in Fukuoka, Japan, which is constantly exposed to high drought risk is investigated in detail using 110 years of data. For the original time series, no significant direct correlation is detected. However, statistically significant correlation coefficients are obtained when using SOI data categorized into five groups according to their magnitudes.
