Recent study of increase in sea level has attributed sea level rise to the thermal expansion of oceans, glacial melting, and added variability from ocean-atmosphere circulation dynamics. Changes in tide range can affect flooding that occurs with subsequent rise in Relative Sea Level. Frequencies of tidal energy are represented by harmonic constituents which have an amplitude and phase lag. Five of the most energetic constituents (M2, S2, O1, K1, and M4) were selected for study in 89 locations across the United States and its territories. Principal lunar semidiurnal constituent M2, principal solar semidiurnal constituent S2, and lunar diurnal constituents O1 and K1 are energetic constituents in a water-level signal. Shallow-water constituent M4 is an indicator of bathymetric variations influencing tidal processes. Constituents were resolved with harmonic analysis and correlated with tidal datums Mean Sea Level (MSL) and Mean Higher High Water (MHHW). Results suggest that constituent behavior differs by individual station with little correlation to MSL. Despite spatial patterns found in some water bodies, the results suggest that local hydrodynamics can affect temporal change in constituents. Further study on constituent behavior is suggested to include hydrodynamic models that compensate for the absence of in-situ data near tide gauges.
|Commitee:||Reiter, Michael, Krejci, Sarah, Isokpehi, Raphael, Dusek, Gregory|
|Department:||School of Graduate and Professional Studies|
|School Location:||United States -- Florida|
|Source:||MAI 81/4(E), Masters Abstracts International|
|Subjects:||Environmental science, Physical oceanography|
|Keywords:||Channel deepening, Harmonic constituents, Sea level rise, Tidal range|
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