Well AO and NAO are sort of two different things. The AO is a general view of the polar areas, where the NAO as we see it, sort of consists of the Greenland area to NE Quebec and the waters E and S. We tend to view Greenland and the Davis Straits area as the NAO region of importance. While we have had prolonged -AOs....a -NAO has been tough to come by. The last prolonged -NAO that I remember was back in March 2018. Other than something transient, a prolonged -NAO has been hard to materialize for whatever reason.