air_potential_temperature / (K)     (grid_longitude: 100)
     Dimension coordinates:
          grid_longitude                           x
     Auxiliary coordinates:
          surface_altitude                         x
     Derived coordinates:
          altitude                                 x
     Scalar coordinates:
          forecast_period: 0.0 hours
          grid_latitude: -0.1278 degrees, bound=(-0.12825, -0.12735) degrees
          level_height: 5.0 m, bound=(0.0, 13.333332) m
          model_level_number: 1
          sigma: 0.9994238, bound=(1.0, 0.99846387)
          time: 2009-09-09 17:10:00
     Attributes:
          source: Iris test case