anchor.diff:  historicalGHG,historicalGHG,GISS-E2-R,NASA-GISS,r3i1p3,noesgf,noesgf,,noesgf,noesgf,use p1,use p1,use p1,use historical,noesgf,use historical,use historical,use p1,use p1,use p1,use historical,,
   historicalGHG,historicalGHG,GISS-E2-R,NASA-GISS,r4i1p3,noesgf,noesgf,,noesgf,noesgf,use p1,use p1,use p1,use historical,noesgf,use historical,use historical,use p1,use p1,use p1,use historical,,
   historicalGHG,historicalGHG,GISS-E2-R,NASA-GISS,r5i1p3,noesgf,noesgf,,noesgf,noesgf,use p1,use p1,use p1,use historical,noesgf,use historical,use historical,use p1,use p1,use p1,use historical,,
  -historicalGHG,historicalGHG,IPSL-CM5A-LR,IPSL,r1i1p1,noesgf,ua6,,ua6,ua6,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,ua6,ua6,r87/dbi599,,
  +historicalGHG,historicalGHG,IPSL-CM5A-LR,IPSL,r1i1p1,noesgf,,,ua6,ua6,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,ua6,ua6,r87/dbi599,,
   historicalGHG,historicalGHG,NorESM1-M,NCC,r1i1p1,ua6,pxp581/requests,,ua6,ua6,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,r87/dbi599,noesgf,ua6,ua6,ua6,r87/dbi599,,
   historicalNat,historicalNat,CanESM2,CCCMA,r1i1p1,,,,,,ua6,ua6,ua6,ua6,ua6,,ua6,ua6,ua6,r87/dbi599,r87/dbi599,,
   historicalNat,historicalNat,CanESM2,CCCMA,r2i1p1,,,,,,ua6,ua6,ua6,ua6,ua6,,ua6,ua6,ua6,r87/dbi599,r87/dbi599,,
  
positive.code: piControl,piControl,CCSM4,NCAR,r1i1p1,,,,,,,ua6,r87/dbi599,,,,,,,,,,Inconsistent so units among files. ua6 files corrected with fix_salinity_units.py 
  piControl,piControl,CSIRO-Mk3-6-0,CSIRO-QCCCE,r1i1p1,ua6,noesgf,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,
  piControl,piControl,FGOALS-g2,LASG-CESS,r1i1p1,,,,,,noesgf,ua6,ua6,ua6,ua6,,ua6,ua6,ua6,ua6,ua6,,
  piControl,piControl,GFDL-CM3,NOAA-GFDL,r1i1p1,,,,,,ua6,ua6,ua6,ua6,,,ua6,ua6,ua6,ua6,ua6,,
  piControl,piControl,GFDL-ESM2M,NOAA-GFDL,r1i1p1,,,,,,ua6,ua6,ua6,ua6,ua6,,ua6,ua6,ua6,ua6,ua6,,
  piControl,piControl,GISS-E2-H,NASA-GISS,r1i1p1,,,,,,,ua6,ua6,,,,,,,,,,
  piControl,piControl,GISS-E2-H,NASA-GISS,r1i1p3,,,,,,,r87/dbi599,r87/dbi599,,,,,,,,,,
  
negative.code: historical,historical,CSIRO-Mk3-6-0,CSIRO-QCCCE,r9i1p1,ua6,noesgf,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,,
  historical,historical,CSIRO-Mk3-6-0,CSIRO-QCCCE,r10i1p1,ua6,noesgf,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,ua6,,
  historical,historical,FGOALS-g2,LASG-CESS,r1i1p1,ua6,noesgf,,noesgf,noesgf,noesgf,ua6,ua6,ua6,r87/dbi599,r87/dbi599,r87/dbi599,ua6,ua6,ua6,r87/dbi599,,
  historical,historical,GFDL-CM3,NOAA-GFDL,r1i1p1,noesgf,,,ua6,ua6,ua6,ua6,ua6,ua6,r87/dbi599,r87/dbi599,r87/dbi599,ua6,ua6,ua6,ua6,,
  historical,historical,GFDL-CM3,NOAA-GFDL,r3i1p1,noesgf,,,ua6,ua6,ua6,ua6,ua6,ua6,r87/dbi599,r87/dbi599,r87/dbi599,ua6,ua6,ua6,ua6,,
  historical,historical,GFDL-CM3,NOAA-GFDL,r5i1p1,noesgf,,,ua6,ua6,ua6,ua6,ua6,ua6,r87/dbi599,r87/dbi599,r87/dbi599,ua6,ua6,ua6,ua6,,
  historical,historical,GFDL-ESM2M,NOAA-GFDL,r1i1p1,noesgf,ua6,,ua6,ua6,ua6,ua6,ua6,ua6,r87/dbi599,r87/dbi599,r87/dbi599,ua6,ua6,ua6,ua6,,
  historical,historical,GISS-E2-H,NASA-GISS,r1i1p1,noesgf,noesgf,,noesgf,noesgf,ua6,ua6,ua6,ua6,r87/dbi599,r87/dbi599,noesgf,r87/dbi599,ua6,r87/dbi599,ua6,,"Time axis values messed up on ua6 (tas, r2; evspsbl, r3)"
  historical,historical,GISS-E2-H,NASA-GISS,r2i1p1,noesgf,noesgf,,noesgf,noesgf,ua6,ua6,ua6,ua6,r87/dbi599,r87/dbi599,noesgf,r87/dbi599,ua6,r87/dbi599,ua6,,
  