which would imply that an IceBase is a subclass of CriticalZone - which would be news to all the Critical Zone scientists out there. The definition of Critical Zone from the National Research Council is “the heterogeneous, near surface environment in which complex interactions involving rock, soil, water, air and living organisms regulate the natural habitat and determine availability of life sustaining resources.” By definition the base of a mass of ice like a glacier or ice sheet is not "near surface" often being many miles below the surface.
Currently IceBase (a term not in any of the WMO GCW glossaries) is defined as:
cryo:IceBase rdf:type owl:Class ; rdfs:subClassOf planet:PlanetaryBoundary .
where PlanetaryBoundary is defined as:
realm:PlanetaryBoundary rdf:type owl:Class ; owl:equivalentClass realm:PlanetarySurfaceLevel .
and PlanetarySurfaceLevel is defined as:
realm:PlanetarySurfaceLevel rdf:type owl:Class ; rdfs:subClassOf realm:CriticalZone , geom:Surface .
which would imply that an IceBase is a subclass of CriticalZone - which would be news to all the Critical Zone scientists out there. The definition of Critical Zone from the National Research Council is “the heterogeneous, near surface environment in which complex interactions involving rock, soil, water, air and living organisms regulate the natural habitat and determine availability of life sustaining resources.” By definition the base of a mass of ice like a glacier or ice sheet is not "near surface" often being many miles below the surface.
In addition, Surface is defined as:
obj:Surface rdf:type owl:Class ; rdfs:subClassOf obj:GeometricalObject .
where GeometricalObject is defined as:
obj:GeometricalObject rdf:type owl:Class ; rdfs:subClassOf math:NumericalEntity .