Abstract
Summary Maximum entropy spectrum analysis of 33 tide-gauge records spanning the late 19th and 20th centuries yields persuasive evidence for the 18.6-yr lunar-nodal term and a heretofore undetected solar-cycle signal in sea level. The mean period and standard deviation (sd) of the observations are TL = 18.5+1.1 and T, = 10.9+0.6yr, respectively, and each has an average amplitude of roughly 9 mm. Additionally, an apparent signal of unknown origin with T, = 6.3yr and A, = 14mm is evidenced.
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