Hockey stick observed in NOAA ice core data

At the Foresight Institute, J. Storrs Hall had some interesting graphs made from NOAA ice core data (Alley, R.B. 2000. The Younger Dryas cold interval as viewed from central Greenland. Quaternary Science Reviews 19:213-226.) It sure seems to mirror other hockey sticks this past century. Dr. Mann will be thrilled to see this I’m sure.…