NASA: cool PDO regime begins

The Reference Frame: NASA: cool PDO regime begins

If the observations above are correct, we could expect 20-30 years of cooling (or cancelled warming).

From a related post here:

California agriculture has ridden a wave of success on that PDO warm phase since 1977, experiencing unprecedented growth. Now that PDO is shifting to a cooler phase, areas that supported crops during the warm phase may no longer be able to do so.