Parameters on the vertical axis¶
The size of the grid (number of latitudes, longitudes and vertical levels) is chosen when compiling LMDz-SACS, so that is it embedded in the executable.
The input files are then read based on the size of the grid: there is no check on the actual values of the coordinates. Caution is then required to ensure that different grids with the same number of latitudes/longitudes/vertical levels are not used for various files, particularly for the mass fluxes in the same simulation.
The actual pressure coordinates
bp are read in vcoord.nc by subroutine
dyn3d/dynstate0.F90). See vcoord format: they are given on NLEV+1 levels with zeros for NLEV+1 XXcheck!!XX.
In files written by LMDz-SACS for future re-use as initial conditions, variable
presnivs is written for information: it contains the pressures of the middles of the NLEV layers (see computation in
Remark: he surface is level number 1, the top of the atmosphere is level number NLEV.