Chaotic dynamics of recharge–discharge El Niño–Southern Oscillation (ENSO) model Saureesh Das, Rashmi Bhardwaj and Varsha Duhoon Eur. Phys. J. Spec. Top., 232 1 (2023) 217-230 Published online: 09 December 2022 DOI: 10.1140/epjs/s11734-022-00742-z