Before the deniers jump in, I went ahead and did the same analysis Tamino did here.

https://tamino.wordpress.com/2016/01/27/el-nino-and-the-2015-record-breaking-heat/

For AK, ENSO this year only contributed about 30% to the warm temps. You could make the argument that most of the other 70% was due to the anthropogenic warming trend. If anyone is interested I can send them the Matlab code and data.