CFSv2 Seasonal SSTs (clim19822010)
first  rec: avg(lastbs-1, lastobs, CFSv2 month 1)
second rec: avg(lastbs, cfs month 1, CFSv2 month 2)
last   rec: CFSv2 month 9
other  rec: CFSv2 3-mo average
 TrgSeason    SST34
   202212    -0.88
   202301    -0.73
   202302    -0.47
   202303    -0.15
   202304     0.08
   202305     0.18
   202306     0.29
   202307     0.43
   202308     0.57
   202309     0.67