Attributes { IZ { Float32 pointwidth 1.0; String long_name "IZ"; Int32 gridtype 0; String units "unitless"; } ISTA { String long_name "ISTA"; Int32 gridtype 2; String units "ids"; } PCO2 { Float32 missing_value NaN; String units "microatm"; } NC_GLOBAL { String Conventions "IRIDL"; } }