By Paul Homewood
h/t NotricksZone
I have long highlighted the fact sea level rise during the first part of the 20thC was just as high as now. In between, sea level rise slowed down considerably.
These sort of oscillations make it imperative that sea level trends are measured over much longer periods. Leading oceanographer, Bruce Douglas, often said that you needed to look at periods of 50 to 60 years.
In a new paper Parker and Ollier have analysed several large datasets of tidal gauge records, and conclude that sea levels have been oscillating about the same trend line during the last century and this century.
Background
Long records of sea level show decadal and multi-decadal oscillations of synchronous and asynchronous phases, which cannot be detected in short-term records. Without incorporating these oscillations, it is impossible to make useful assessments of present global accelerations and reliable predictions of future changes…
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