No. 76: Jul-Aug 1991
"According to a study by the Institute of Oceanographic Sciences, waves in the northeastern Atlantic are getting bigger. The average wave height in the 1960s was about 7 feet. Now the average is 9-10 feet."
(Anonymous; Coming Changes, 13:7, MayJune 1991.)
Comment. This is a very large increase (about 30%) for this geophysical variable. Have surface winds increased that much in such a short period?