The following applies to analyses show in figures 02, 03, 04, 05, 06, 08, 13, 14, 16, 17, 18, 19, 20, 21, A1 and A2 and the creation of the section shown in figure 11.

Variables from different experiments are named as follows :

OJ      ORCA025-JRA           
OJST    ORCA025-JRA-strong
OJO     ORCA025-JRA-OMIP
OJO2nd  ORCA025-JRA-OMIP-2nd
VC      VIKING20X-CORE	
VJS     VIKING20X-JRA-short
VJL     VIKING20X-JRA-long
VJO     VIKING20X-JRA-OMIP
IJL     INALT20-JRA-long


CDFTOOLS are used to compute

- AMOC fields in depth coordinates (cdfmoc) and density coordinates, here sigma2 (cdfmocsig)
$CDFTOOLS/cdfmoc -v $IN_V -decomp -t $IN_T -u $IN_U -o $OUT
$CDFTOOLS/cdfamocsig -v $IN_V -t $IN_T -r 2000 -isodep -o $OUT
For AMOC calculations on the nest grid, a routine, only taking into account for the Atlantic subbasin is used (cdfamoc - included here)
$CDFTOOLS/cdfamoc -v $IN_V -decomp -t $IN_T -u $IN_U -o $OUT

- detrended SSH fields (cdfzeromean)
The global mean SSH at each timestep is subtracted from the SSH-field to exclude the model-related drift prior to SSH-variance calculations; on the nest grid, the global mean SSH from the host grid is used for detrending:
$CDFTOOLS/cdfglobalmean -f $IN -v sossheig -p T -zeromean -o $GLOBAL_MEAN_HOST -oz $ZOUT -surf 
$CDFTOOLS/cdfzeromean -f $IN -v sossheig -p T -zeromean -readmean $GLOBAL_MEAN_HOST -o $OUT -oz $ZOUT -surf 
(both routines, cdfglobalmean and cdfzeromean, included here)

- non-zonal or non-meridional sections defined in text file "SECTION" (cdf_xtrax_brokenline)
$CDFTOOLS/cdf_xtrac_brokenline -t $IN_T -u $IN_U -v $IN_V -f SECTION -vecrot -b $BAT -o $OUT
SECTION are DS, FBC, sec53N, NBCsection_obs and additionally including adjustments necessary for the coarser ORCA025 grid, sec53N_O025 and NBCsection_obs_O025

- densities (cdfsig0)
$CDFTOOLS/cdfsig0 -t $IN_T -o $OUT

- EKE (cdfeke_KIEL - routine included here - based on CDFTOOLS-version 3.0)
$CDFTOOLS/cdfeke_KIEL $IN_U $IN_V $IN_T -o $OU

- fresh water content (cdffwc)
$CDFTOOLS/cdffwc -s $IN_T -bv ARCTIC,SPG -o $OUT -ssh


ferret is used to derive further quanities:
- SSH variance based on 5-day averaged date using expression @var
- transport integrations based on sigma0 criteria 
- time-filtering is applied by using the Hanning filter expression @shn (23 months for interannual, 119 months for pentadal)
- linear trends are derived using regresst.jnl