Plotting real tidal data from different regions and different tidal reference stations, it is clear that some tidal datums often have the same relative position.
Trivial examples are the relative positions of the Lowest High Water (LHW) and the Highest High Water (HHW); or of the Mean Lower High Water (MLHW) and the Mean Higher High Water (MHHW) in a semidiurnal cycle.
However, the relative position of some other datums does not appear as trivial, especially when considering the neap-spring synodic cycle.
For example, the Lowest High Water Neap (LHWN) can be lower or higher than the Highest Low Water Neap (HLWN), i.e. the range of the neap high tide can overlap or not with the range of the neap low tide. Another example is the relative position of MLHW and the Mean High Water Neap (MHWN).
I wonder if there is any classification of tidal regimes that describes these types of patterns, that is or might be related to geographic areas, or ecological patterns.
Dear Polgar,
Have you checked the NOAA websites on Tides and Currents?
https://tidesandcurrents.noaa.gov/datum_options.html
https://tidesandcurrents.noaa.gov/press/tidaldatum.html
There are regional tidal datums as well....
http://climate.buzzardsbay.org/tidal-datums-benchmarks.html
I am not sure if this will help.
Ciao
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