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
   202208    -0.91
   202209    -1.14
   202210    -1.31
   202211    -1.37
   202212    -1.24
   202301    -0.89
   202302    -0.51
   202303    -0.16
   202304     0.13
   202305     0.37