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
   202207    -0.78
   202208    -0.86
   202209    -1.03
   202210    -1.09
   202211    -1.10
   202212    -0.92
   202301    -0.57
   202302    -0.24
   202303     0.03
   202304     0.23