Configure Modes NOT scientifically validated, documented, supported or, in some cases, even advised to be used:

1. C13

   (-c13)

   The C13 mode for bgc=cn is NOT scientifically validated or documented and is NOT recommended for use.

2. CASA

   (-bgc casa)

   The bgc=casa mode is NOT scientifically validated or documented and is NOT recommended for use.

3. SUPLN

   (-bgc cn -supln on)

   The supplemental Nitrogen mode of the CN Biogeochemistry model supplies unlimited nitrogen and therefore vegetation is over-productive in this mode.

4. BUILDPIO

   (-pio)

   This mode is NOT tested and is not functional and hence should NOT be used. PIO WILL be provided in future versions however.

5. SNICAR_FRC

   (-snicar_frc)

   This mode is tested and functional, but is NOT constantly scientifically validated, and should be considered experimental.

6. PERGRO

   (-pergro)

   This mode is tested to be functional, but NOT scientifically validated. It's purpose is to help validate that a port to a new machine is reasonable, or that changes that are only roundoff will NOT affect the climate. Using PERGRO as a validation tool remains experimental. See the Section called Doing perturbation error growth tests in Chapter 4 for more information on how to do this.