re: el nino and arctic :
My thoughts are the el Nino years look quite normal (with the overall decreasing trend), but the arctic abnormality would start in 1 - 1½ years (divided about like this: 6 months for the normal Nino effect in tropics&subtropics + 6 months for the el Nino warmed water cycle to pass Ferrel cell + some odd months for oceanic circulation to get to the Arctic) That would be late 2016, in this case, or if the Nino of 2015 is delayed 2017)
Mind you, in records 2014 was a very mild el Nino year. In addition, I'd say the destruction of the polar vortex (creating the boundary for the polar atmospheric cell) could speed up things a bit, so given the prediction of late June 2015 Nino realizes, July-August 2016 would be sort of 'go brown'-months for polar bears.