CryoGrid code structure

Folder structure

The CryoGrid model code is contained in the folder “modules”, in which it is organized as follows:

• modules/TIER0: base level: contains the basic class definitions for CryoGrid SUBSURFACE and INTERACTION classes. TIER0 does not contain functional CryoGrid classes.

• modules/TIER1: library level: inherits from TIER0 base classes, contains classes comprising all functions related to a certain physical process. TIER1 does not contain functional CryoGrid classes.

• modules/TIER2: first SUBSURFACE class level: inherits from TIER1 library classes, contains fully functional CryoGrid classes

• modules/TIER3: second SUBSURFACE class level: inherits from TIER2 SUBSURFACE classes, contains fully functional CryoGrid classes. TIER3 in particular contains the SUBSURFACE classes (GROUND, LAKE, etc. classes) that can interact with a (SUBSURFACE) SNOW class.

• modulesTIERXX/INTERACTION: INTERACTION (IA) classes defining interactions and fluxes between pairs of SUBSURFACE classes, same TIER structure as for SUBSURFACE classes

and so on ….