Name	Notation	Description	Types	Status
Atmosphere	atmosphere	Spatial extent from the Earth surface towards but excluding s...	Concept	stable
Cryosphere	cryosphere	A component of the Earth system that contains ice, including ...	Concept	stable
Hydrological	hydrological	Non-saline, non-atmosphere, non-cryosphere part of the hydros...	Concept	stable
Ocean or Sea	ocean	Continuous saline, non-cryosphere part of the hydrosphere.	Concept	stable
Solid Earth	solidEarth	Spatial extent of the Earth from the solid surface inwards.	Concept	stable
Space	space	Spatial extent above the atmosphere around Earth above the Ka...	Concept	stable
Terrestrial	terrestrial	Spatial extent comprised of land masses, normally not covered...	Concept	stable