Eddy memory in weakly nonlinear two-layer quasi-geostrophic ocean flows Henk A. Dijkstra, Georgy Manucharyan and Woosok Moon Eur. Phys. J. Plus, 137 10 (2022) 1162 Published online: 20 October 2022 DOI: 10.1140/epjp/s13360-022-03360-9