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
   201409     0.29
   201410     0.51
   201411     0.61
   201412     0.63
   201501     0.62
   201502     0.65
   201503     0.70
   201504     0.73
   201505     0.87
   201506     1.14