Reconstructed maps of the large-scale field of DO Tau showing the radial, azimuthal and meridional components in spherical coordinates (left, middle and right columns, units in G), for seasons 2021, 2024, and 2025 (top to bottom rows, respectively). These maps, derived from the LSD Stokes I and V profiles of Fig. 2 using ZDI, are displayed in a flattened polar projection down to latitude −45°, with the north pole at the center and the equator depicted as a bold line. Outer ticks mark the phases of observations. Positive radial, azimuthal, and meridional fields point outward, counterclockwise, and poleward, respectively.