South China Sea Mesoscale Eddy Catalog (1993–2020)

We release a daily catalog of mesoscale eddies over the South China Sea (~0–25°N, 100–125°E) from 1993-01-01 to 2020-12-31, comprising 312,024 eddy instances across 10,227 unique days (no gaps). Each record reports polarity (cyclonic=1, anticyclonic=2), center position, geometric scales (radius, area), SSH-based amplitudes, and kinematic properties (maximum circum-averaged speed, EKE). The main table is distributed as Apache Parquet with SI units and common derived fields, accompanied by daily counts and sampled image pairs. This artifact enables reproducible eddy statistics, model benchmarking, and cross-disciplinary reuse.