python y轴刻度和图分离

龙星群

大佬们，我的纬度当中心调到180°为啥会和图分离，中心纬度170-180图都会出现不同程度的分离。

龙星群

fig_ax.set_extent(extent, crs=ccrs.PlateCarree())
    fig_ax.add_feature(cfeature.COASTLINE.with_scale('10m'),lw=0.5)
    fig_ax.add_feature(cfeature.LAKES, alpha=0.5)
    fig_ax.set_xticks(np.arange(extent[0],extent[1]+30, 30), crs=ccrs.PlateCarree())
    fig_ax.set_xticks(np.arange(extent[0], extent[1] + 10, 10), minor=True, crs=ccrs.PlateCarree())
    fig_ax.set_yticks(np.arange(extent[2], extent[3] + 10, 10), minor=True, crs=ccrs.PlateCarree())
    fig_ax.set_yticks(np.arange(extent[2],extent[3]+20,20), crs=ccrs.PlateCarree())
    fig_ax.xaxis.set_tick_params(which='major', width=1, length=4)  # 主刻度  wihch= major minor both
    fig_ax.yaxis.set_tick_params(which='major', width=1, length=4)
    fig_ax.xaxis.set_tick_params(which='minor', width=0.5, length=2)
    fig_ax.yaxis.set_tick_params(which='minor', width=0.5, length=2)
    lon_formatter = cticker.LongitudeFormatter()
    lat_formatter = cticker.LatitudeFormatter()
    fig_ax.xaxis.set_major_formatter(lon_formatter)
    fig_ax.yaxis.set_major_formatter(lat_formatter)
    plt.tick_params(labelsize=6)
    return fig_ax
fig = plt.figure(figsize=(12,12),dpi=300)
proj = ccrs.PlateCarree(central_longitude=171)
extent_pr = [0, 360, -40, 60]
#extent_ts = [0, 360, -90, 90]

灭火器

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