Data and code from: Oceanic mesoscale eddies enhance the Pacific Decadal Oscillation and its predictability
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The Pacific Decadal Oscillation (PDO) profoundly influences marine ecosystems, fisheries, and global hydroclimate. While traditionally interpreted as basin-scale oceanic responses to atmospheric stochastic forcing, whether its dynamics involve active ocean feedbacks remains unresolved. Using an unprecedented multi-century eddy-resolving global climate simulation, we find that mesoscale eddy-driven atmospheric anomalies in the Kuroshio Extension (KE) region are critical to PDO evolution. During the PDO cold phase, the northward-shifted meandering KE generates mesoscale sea surface temperature (SST) anomalies that intensify the lateral diabatic heating gradient, driving deep updrafts that cool the mid-troposphere and weaken its northern baroclinicity. This suppresses transient eddy momentum flux and facilitates a basin-scale low-pressure anomaly, initiating transition to the warm phase. Concurrently, mesoscale eddy-induced vertical heat transport sustains SST anomalies, providing addition..., , # Data and code from: Oceanic mesoscale eddies enhance the Pacific Decadal Oscillation and its predictability Dataset DOI: 10.5061/dryad.np5hqc07p ## Dataset overview This dataset accompanies the study: âOceanic mesoscale eddies enhance the Pacific Decadal Oscillation and its predictabilityâ. The dataset contains MATLAB scripts (.m) and processed data files (.mat) used to reproduce all figures in the manuscript. ### Scientific context The Pacific Decadal Oscillation (PDO) profoundly influences marine ecosystems, fisheries, and global hydroclimate. While traditionally interpreted as basin-scale oceanic responses to atmospheric stochastic forcing, whether its dynamics involve active ocean feedbacks remains unresolved. Using an unprecedented multi-century eddy-resolving global climate simulation, we find that mesoscale eddy-driven atmospheric anomalies in the Kuroshio Extension (KE) region are critical to PDO evolution. During the PDO cold phase, the northward-shifted meandering KE g..., ,
