CFSv2 monthly mean SSTs (clim19912020)
 TrgMonth     SST34
   202312     1.77
   202401     1.68
   202402     1.36
   202403     0.95
   202404     0.60
   202405     0.05
   202406    -0.64
   202407    -0.95
   202408    -1.19