Dataset {
    Float32 X[X = 360];
    Float32 T[T = 495];
    Float32 Y[Y = 180];
    Grid {
     ARRAY:
        Byte sea_ice[T = 495][Y = 180][X = 360];
     MAPS:
        Float32 T[T = 495];
        Float32 Y[Y = 180];
        Float32 X[X = 360];
    } sea_ice;
} monthly;