Coherence of Eddy Kinetic Energy Variation during Eddy Life Span to Low-Frequency Ageostrophic Energy

The evolution of mesoscale eddies is crucial for understanding the ocean energy cascade. In this study, using global reanalysis sea surface velocity data and a eddy trajectory product tracked by satellite altimeters, we aimed to reveal coherence kinetic (EKE) variation low-frequency ageostrophic during life span. in EKE throughout span was highly coherent that seven-day low-passed energy, with correlation coefficient −0.94. motions supplied 38% growing stage absorbed 42% decaying stage. rate consistent barotropic conversion motions, further confirming dominant role growth decay.