The JIASO PDO index has not had negative number since December 2013. That's 49 straight months, an apparent JIASO record for staying in positive territory, and during which the Berkley Earth mean has been a rather astonishing .70 ℃ (the mean from 1999 to 2014 is .46 ℃.) How can it make any sense at all to keep referring to the PDO as being in a negative phase that started around 1999? It's pretty obvious the negative phase that started around 1999 has ended. Time to put up its tombstone and to move on. Lately I have seen references to PDO neutral. Is there such a thing as PDO neutral?