Abstract
Abstract
This study aims to determine the effect of rainfall anomalies due to ENSO on tea productivity in Bandung Regency West Java Indonesia. This study used data on monthly rainfall, tea productivity, and the Nino 3.4 index from 2003-2020. The methods used are Fast Fourier Transform (FFT), Butterworth Bandpass Filter, and Inverse Fast Fourier Transform (IFFT) for the processing of these three data. The results of this study indicate that the rainfall pattern in the Bandung Regency area in 4 districts (Rancabali, Pasirjambu, Pangalengan, and Kertasari) is monsoon. ENSO correlation to rainfall anomalies and rainfall anomalies correlation to tea productivity in each district is low. The highest correlation between ENSO to rainfall anomalies is found in Pangalengan District (-0.309) and the highest correlation between rainfall anomalies to tea productivity is found in Kert asari District for lag 0 and 1 which are -0.304 and -0.285 respectively. The low correlation (-0.148 to - 0.309) showed that the effect of rainfall anomalies due to ENSO on tea productivity of each district in Bandung Regency has a small effect but with a significance value of less than 5% (0.000 to 0.030) which means it has a significant relationship.