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
   201602     2.18
   201603     1.77
   201604     1.35
   201605     1.20
   201606     1.12
   201607     1.02
   201608     0.92
   201609     0.98
   201610     1.15
   201611     1.34