https://thredds.rda.ucar.edu/thredds/ncss/grid/files/g/d316000/20thC/synop/sl/1972/1972.20thC.sl.0500.nc?north=90.000&west=-180.000&east=180.000&south=-90.000&horizStride=1&time_start=1972-05-01T00:00:00Z&time_end=1972-05-31T00:00:00Z&&&accept=netcdf3