Impact of mesoscale eddies on chlorophyll variability off the coast of Chile

摘要: The mesoscale eddies off the coast of Chile significantly impact distribution local chlorophyll and development marine ecosystem. Multiple processes, including eddy trapping, pumping, advection, Ekman-pumping, submesoscale dynamics, exert their impacts simultaneously on transport water masses at different distances with respect to center. cyclonic (anticyclonic) are generally characterized by upwelling (downwelling) within eddy, which elevates (depresses) inside eddy. Outside periphery, multiple processes involved simultaneously, but corresponding influences not well identified. In this study, amplitudes anticyclonic distinguished as positive negative values, respectively. A linear regression method is applied seek connection between eddy's amplitude locations w.r.t. slope anomaly found be in interior along gradually changes away from periphery. location where response an switches its sign defined transition zone. zone varies offshore distance impacted topography, such presence islands, can change dynamics eddies. Thus, center should taken into consideration when investigating nutrient distribution.