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
   202203    -0.91
   202204    -1.12
   202204    -1.12
   202205    -1.22
   202206    -1.18
   202207    -1.06
   202208    -0.99
   202209    -1.02
   202210    -1.04
   202211    -0.98
   202212    -0.82