by Albert Parker, March 1, 2019 in Ocean&CoastalManagement

Highlights

• Japan has strong quasi-20 and quasi-60 years low frequencies sea level fluctuations.

• These periodicities translate in specific length requirements of tide gauge records.

• 1894/1906 to present, there is no sea level acceleration in the 5 long-term stations.

• Those not affected by crustal movement (4 of 5) do not even show a rising trend.

•Proper consideration of the natural oscillations should inform coastal planning.

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See also here