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
   201404     0.29
   201405     0.54
   201406     0.58
   201407     0.68
   201408     0.78
   201409     1.00
   201410     1.19
   201411     1.31
   201412     1.29
   201501     1.16