El Niño, the cyclic warming of the tropical Pacific, brought wet weather to the southeastern U.S. at the same time that a strong negative phase in a pressure cycle called the North Atlantic Oscillation pushed frigid air from the arctic down the East Coast and across northwest Europe. (dotearth.blogs.nytimes.com)
Thus their meta - analyses totally obscured the cyclic warming and cooling that accompanied those migrations during the 20th century. (landscapesandcycles.net)
This 0.16 deg C per decade is a cyclic warming rate, as there was the same warming rate from 1910 to 1940. (judithcurry.com)