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
   202209    -1.03
   202210    -1.08
   202211    -1.10
   202212    -0.97
   202301    -0.68
   202302    -0.35
   202303    -0.06
   202304     0.13
   202305     0.28
   202306     0.44