Empirical Ortrhogonal Function Analysis of Rainfall Variability over Thailand with ENSO

• 作 者: SarinyaKIRTPHAIBOON[1]UsaHUMPHRIES[2]PrungchanWONGWISES[1]AtsamonLIMSAKUL[3]SirapongSOOKTAWEE[3]
• 机 构: The Joint Graduate School of Energy and Environment,King Mongkut's University of Technology Thonbur
• 出 处: 2014 ICCES International Training Workshop on Asian Monsoon
• 发表日期: 2014年期

　　This study aimed to use the Empirical Orthogonal Function (EOF) technique to analyze the monthly rainfall data of the Global Precipitation Climatology Centre (GPCC) over Thailand during 1971 to 2010.This technique based on a linear transformation to extract information from the large data sets by decomposing to the orthogonal basis function while retaining as much as possible of the variations present in the data sets.The most dominant mode explained 21.6% of the total variance.To interpret between the spatial pattern and the time series, it was found that the rainfall variability over Thailand can be linked to E1 Nino-Southern Oscillation (ENSO) events.There was low rainfall in the warm phase of ENSO (El Nino phenomenon) whereas there was high rainfall in the cold phase of ENSO (La Nina phenomenon).