netcdf CSIRO/Climatology/CARS/2009/nitrate_cars2009.nc {
  dimensions:
    detail_string = UNLIMITED;   // (497 currently)
    depth = 79;
    depth_ann = 55;
    depth_semiann = 40;
    lat = 331;
    lon = 721;
    one = 1;
    yx = 2;
    four = 4;
  variables:
    float depth(depth=79);
      :long_name = "depth";
      :units = "m";
      :positive = "down";
      :valid_range = 0.0f, 5500.0f; // float

    float depth_ann(depth_ann=55);
      :long_name = "depths of annual fields";
      :units = "m";
      :positive = "down";
      :valid_range = 0.0f, 1000.0f; // float

    float depth_semiann(depth_semiann=40);
      :long_name = "depths of semi-annual fields";
      :units = "m";
      :positive = "down";
      :valid_range = 0.0f, 375.0f; // float

    float lon(lon=721);
      :long_name = "longitude";
      :units = "degrees_east";
      :valid_range = 0.0f, 360.0f; // float

    float lat(lat=331);
      :long_name = "latitude";
      :units = "degrees_north";
      :valid_range = -90.0f, 90.0f; // float

    float grid_space(yx=2);
      :long_name = "Y & X grid spacing";
      :units = "degrees_north";

    float ngridpts(yx=2);
      :long_name = "number of grid points in Y & X directions";
      :units = "counts";

    float gr_origin(yx=2);
      :long_name = "Grid origin in lat-lon space";
      :units = "degrees_north";

    float rotation(one=1);
      :long_name = "Rotation of grid about origin";
      :units = "radians";

    float corners(yx=2, four=4);
      :long_name = "Grid polygon corners in lat-lon space";
      :units = "degrees_north";

    char map_details(detail_string=497, depth=79);
      :long_name = "Mapping details";

    short nq(depth=79, lat=331, lon=721);
      :long_name = "Number of data used";
      :units = "counts";
      :scale_factor = 1.0; // double
      :add_offset = 0.0; // double
      :_FillValue = -32767S; // short

    short radius_q(depth=79, lat=331, lon=721);
      :long_name = "data-source-ellipse minor radius";
      :units = "km";
      :scale_factor = 1.0; // double
      :add_offset = 0.0; // double
      :_FillValue = -32767S; // short

    short mean(depth=79, lat=331, lon=721);
      :long_name = "mean nitrate";
      :units = "u mol";
      :scale_factor = 9.155692551844109E-4; // double
      :add_offset = 28.0; // double
      :_FillValue = -32767S; // short

    short an_cos(depth_ann=55, lat=331, lon=721);
      :long_name = "annual cosine nitrate";
      :units = "u mol";
      :scale_factor = 6.103795034562739E-4; // double
      :_FillValue = -32767S; // short

    short an_sin(depth_ann=55, lat=331, lon=721);
      :long_name = "annual sine nitrate";
      :units = "u mol";
      :scale_factor = 6.103795034562739E-4; // double
      :_FillValue = -32767S; // short

    short sa_cos(depth_semiann=40, lat=331, lon=721);
      :long_name = "semi-annual cosine nitrate";
      :units = "u mol";
      :scale_factor = 6.103795034562739E-4; // double
      :_FillValue = -32767S; // short

    short sa_sin(depth_semiann=40, lat=331, lon=721);
      :long_name = "semi-annual sine nitrate";
      :units = "u mol";
      :scale_factor = 6.103795034562739E-4; // double
      :_FillValue = -32767S; // short

    short RMSspatialresid(depth=79, lat=331, lon=721);
      :long_name = "mean of abs(residuals) wrt spatial mean";
      :units = "u mol";
      :scale_factor = 9.155692551844109E-4; // double
      :add_offset = 0.0; // double
      :_FillValue = -32767S; // short

    short RMSresid(depth_ann=55, lat=331, lon=721);
      :long_name = "mean of abs(residuals) wrt full temporal mapping";
      :units = "u mol";
      :scale_factor = 9.155692551844109E-4; // double
      :add_offset = 0.0; // double
      :_FillValue = -32767S; // short

    short sumofwgts(depth=79, lat=331, lon=721);
      :long_name = "sum of weights";
      :scale_factor = 0.1; // double
      :add_offset = 3000.0; // double
      :_FillValue = -32767S; // short

  // global attributes:
  :Conventions = "COARDS";
  :institution = "CSIRO Marine and Atmospheric Research";
  :source = " ";
  :references = "Loess: Ridgway K. R. , J. R. Dunn and J. L. Wilkin, Ocean interpolation by four-dimensional least squares -Application to the waters around Australia, J. Atmos. Ocean. Tech., Vol 19, No 9, 1357-1375, 2002      BAR,TAR:  J.R. Dunn and K.R. Ridgway, Mapping ocean properties in regions of complex topography, Deep Sea Research Part I : Oceanographic Research, 49 (3) (2002) pp. 591-604.";
  :comment = " ";
  :URL = "http://www.cmar.csiro.au/cars";
  :metadata = "MarLIN record 8539, Anzlic identifier ANZCW0306008539";
  :cars_version = "2011.1.0";
  :title = "nitrate at standard depths";
  :history = "Jeff Dunn created on 27-May-2011. CSIRO Marine & Atmospheric Research. Mapped from 7 9 13 19 31 52  data using loess mapping, z-fitting replaced by local-weighted z-fill from adjacent levels. Mean and seasonal cycles adjusted to remove negatives. Clusters (>10 in 250m radius) thinned to monthly means. Annual fit to 1000m,  Semi-annual fit to 375m,  TAR 1  BAR used,  Bogus mean weight=exp(-(1.2*r/r(Q/10)).^3) . Bad 360E values replaced by 0E values, 27-May-2011 Arctic map in nitrate_arctic.nc added 27-May-2011";
}