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Oceanography Exam 2
Tides
12
Science
Undergraduate 1
10/26/2011

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Cards

Term
Why are tides shallow water waves?
Definition
The sun creates smaller tidal bulges than the moon.
Term
What causes the earth's tidal bulges?
Definition
Gravitational pull of the moon and sun on ocean water
Term
What/ when are the phases of the moon and how do they relate to tidal patterns?
Definition
Full
Waxing Gibbous
First Quarter Half moon
Waxing crescent
new moon
waning crescent
third quarter half moon
waning gibbous
Term
Diurnal
1 hi 1 low daily
Gulf Coast
Definition
[image]
Term
Mixed
Uneven
2 hi, 2 low daily
Pacific Coast
Definition
[image]
Term
SemiDiurnal
2 hi 2 low
Atlantic Coast
Definition
[image]
Term
How long is a lunar day/ tidal cycle?
Definition
24 Hours and 50 minutes
The moon rises 50 minutes later eachday
Term
What and when are the Spring tides?
Definition
During Earth-Moon-Sun alignment (syzygy) sun and moon gravitational pulls are additive: causes higher high tides and lower low tides
= SPRING TIDES (during full moon and new moon)
Term
What and when are the Neap tides?
Definition
During 90o arrangement of Earth-Moon-Sun (quadrature),lower high tides & higher low tides
= NEAP TIDES (during half moons)
Term
What are ebb and flood tides?
Definition
Flood tide= rising
Edd tide= sinking
Term
What is a tidal bore?
Definition
Tides also move up rivers (100’s miles): If tide strong enough and river flow weak enough, get a visible wave
Term
Where do we see the greatest tidal ranges and why?
Definition
At the bay of fundy due to the funnel shaped coast.
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