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
   201608    -0.51
   201609    -0.51
   201610    -0.49
   201611    -0.55
   201612    -0.60
   201701    -0.51
   201702    -0.26
   201703     0.03
   201704     0.26
   201705     0.41