MAR 555 Lecture 20: Coastal Tides
Tides caused by the resulting gravitational and centrifugal forces is called “equilibrium tide”. They can be expressed using the harmonic functions as
Nsemi ! = " A cos2 $cos(% t + 2&) e(semi) # i ei ei i =1
Ndiurnal ! = " Aˆ cos 2$cos(%ˆ t + &) e(diurnal) # i ei ei i =1 ˆ Aei and Ae i the amplitudes of the ith semidiurnal and diurnal equilibrium tidal elevations ! and !ˆ ei ei the frequencies of the ith semidiurnal and diurnal equilibrium tidal elevations ! and " la titude and longitude