Geology Reference
In-Depth Information
Fig. 1.9
Graphs showing predicted high-data for two tidal
references stations from the east coast and Gulf coast USA. The
Port Manatee example is typical of the tides in the Gulf coast
and the Hunniwell graph typifies east coast tides. Both tidal
records cover the same interval of time from January through
early May, 2005 (National Oceanographic and Atmospheric
Administration Web site
2004
). Note that the equatorial pas-
sages of the Moon are fixed with the neap tides in the Gulf
coast station but move through the graph in the east coast exam-
ple. As such, Gulf coast neap-spring tides are driven by the
tropical month but the east coast neap-spring tides are controlled
by the phase changes of the Moon associated with the synodic
month (From Kvale (
2006
) and used by permission from Marine
Geology)
