| Name: | Elizabeth Thomas |
| Affiliation: | Mar Thoma College, Tiruvalla, Kerala, India |
| Conference ID : | ASI2022_130 |
| Title : | Periodicity of Sunspot Number and Rainfall over Kerala using Wavelet Analysis |
| Authors : | Elizabeth Thomas (1), Irene Joseph (2) and Noble P. Abraham (1) Affiliation: (1) Department of Physics, Mar Thoma College, Tiruvalla, Kerala, India (2) Department of Physics, Devaswom Board Pampa College, Parumala, Kerala, India |
| Abstract Type: | Poster |
| Abstract Category : | Sun and the Solar System |
| Abstract : | In this work, we employ Fourier and wavelet analysis on time series of rainfall over Kerala and sunspot number. We use 146 years data (1871-2016) for sunspot numbers from World Data Center SILSO, Royal Observatory of Belgium, Brussels and monthly rainfall data for the state of Kerala in mm from Indian Institute of Tropical Meteorology, Pune, India . Both the data were considered on monthly scale, grouped into various seasonal months. These analyses give an insight on common periodicities. The periodicity of sunspot number and rainfall estimated by Fourier analysis is in agreement with wavelet analysis. We observe that rainfall is more correlated with sunspots numbers, in shorter periods such as 2.4 months, 3 months, 4 months, 6 months and a year than 11 years, 22 years or higher order periods. Keywords: rainfall, sunspots, Kerala, Wavelet analysis |