Tides Flashcards
0
Q
What is tidal information used for?
A
Hydrographic surveying (to reduce soundings) Navigators (safely navigate shallow waters Engineers (coastal work construction) The public (fishing, sailing etc)
1
Q
What is the definition of a tide?
A
The periodic vertical movement of the oceans on the earths surface
2
Q
Name 3 causes of tides
A
Centrifugal force creating a tidal bulge
Coriolis effect
Circulation of ocean gyres
3
Q
Name 2 meteorological effects on the tides
A
Strong/prolonged winds
Unusually high/low barometric pressure (atmospheric)
4
Q
What is dynamic theory of the tides?
A
Represents tide as a wave forced by tide producing forces. Rise and fall on coast results from convergence or divergence.
5
Q
What 4 considerations of dynamic theory are there?
A
Presence of landmass
Effect of shallow water
Rotation of the earth
Time lag In ocean response to ride raising forces