This dataset contains barotropic model outputs supporting Figures 3, 4, 6 and Table 1 of the manuscript: "Climate-driven winter monsoon weakening reorganizes shelf circulation in the Yellow Sea". The archive includes outputs from the E1 (strong-monsoon), E2 (weak-monsoon), TestV (meridional wind anomaly), and TestU (zonal wind anomaly) experiments. These outputs are used to diagnose circulation reorganization, cross-trough transport redistribution, and wind-component sensitivity. Each experiment folder contains depth-averaged velocity fields (UVJ.dat) and barotropic streamfunction fields (pusan.dat) used in the analysis. Public source datasets used to construct the forcing fields are cited in the manuscript.