lecture 4 tides
Post on 16-Jan-2016
48 Views
Preview:
DESCRIPTION
TRANSCRIPT
Lecture 4 Tides
Tides
Three Players – Earth, Moon, Sun
-moon is the most important element
GRAVITATION
G M
1/R2
Gravitational force =
M MR
Gravitational bulge
Gravitational bulgeCentrifugal bulge
C • • •B A
• • •
Gravitational force
Earth Moon
A little more reality
Path of moon’s centre
Path of earth’s centre
Both the earth and the moon revolve around their common centre of gravity
•Common centre of gravity
A little more reality
x
Common centre of gravity
Path of earth’s centre
1
2
3
4
A little more reality
A little more reality
Daily advance of peak tide
Daily advance of peak tide
Daily change of tide heights
Daily change of tide heights
Different tide cycles
Different tide cycles
Different tide cycles
Diurnal Tide
Different tide cycles
Semidiurnal Tide
Different tide cycles
Mixed Semidiurnal Tide
Different tide cycles
Coriolus forces
Coriolus forces
Coriolus forces and gyres
Coriolus forces and gyres
Amphidromic points
Amphidromic points - Animation
Amphidromic Points - Gulf of St. Lawrence
Tide Levels and Chart Datum
Mhws - Mean High Water on the Spring tide
Mhws - Mean High Water on the Neap tide
Mhws - Mean Low Water on the Spring tide
Mhws - Mean Low Water on the Neap tide
MHWS
MLWS
MHWN
MLWN
MTL Spring Range
NeapRange
Mtl - Mean Tide Level
Chart Datum
Tidal Bore
Bay of Fundy Tides
Bay of Fundy Tides
Bay of Fundy Tides
Determination of Tide Level
Finding the tide
Primary port
Secondary ports
Tides and Weather
Tides and Weather
Tides and Weather
Tides and Weather
Tides and Weather
Parlee Beach
Tides and Weather
Saxby Gale - 1869
Hurricane Sandy
Hurricane Sandy
Hurricane Sandy
Hurricane Sandy
Next time
Waves and Currents
top related