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• Definition
• Universal Law of Gravitation
Sir Isaac Newton: December 25th, 1642 – March, 20th 1727
Physicist, mathematician, astronomer; often regarded
as one of the most influential scientists of all time.
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• Tidal Day / Forced Wave
Definition
Universal Law of Gravitation
gravitational constant (G) = 6.673×10−11 N·(m/kg)2
Tidal Day / Forced Wave
Types of Tides: Diurnal, Semidiurnal and MixedSemidiurnal
Zero Tide
Spring Tides and Neap Tides
Flood Tides and Tidal Bores, Ebb Tides and Slack
Water
Progressive Tides and Rotary Tides, Amphidromic
Points
Tidal Bores
Reading a Tide Book (lab project)
Distance from the Earth to
the Moon:
at apogee = 405,500 km
at perigee = 363,300 km
mean = 384,400 km
difference is 11%
Distance from the Earth to
the Sun = 93,000,000 miles
or 150,000,000 km also
known as an Astronomical
Unit (AU)
Distance from earth to sun varies by about 3.4 million Km/yr
or 2.1 million miles/yr
https://www.fourmilab.ch/earthview/pacalc.html
apogee / perigee calendar
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The Forced Wave
The Tidal Day
• Plot Tides in
Lab. Read
instructions
carefully.
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Definition
Universal Law of Gravitation
Tidal Day / Forced Wave
Types of Tides: Diurnal, Semidiurnal and MixedSemidiurnal
Zero Tide
Spring Tides and Neap Tides
Flood Tides and Tidal Bores, Ebb Tides and Slack
Water
Progressive Tides and Rotary Tides, Amphidromic
Points
Tidal Bores
Reading a Tide Book (lab project)
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Types of Tides:
Figure 10.1
Figure 10.2
Diurnal
Semidiurnal
Semidiurnal
Mixed (Mixed)
Or Mixed Semi Diurnal
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Tides……………………………………………………………………..
C
C
TIDES OUTLINE
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Definition
Universal Law of Gravitation
Tidal Day / Forced Wave
Types of Tides: Diurnal, Semidiurnal and MixedSemidiurnal
Zero Tide
Spring Tides and Neap Tides
Flood Tides and Tidal Bores, Ebb Tides and Slack
Water
Progressive Tides and Rotary Tides, Amphidromic
Points
Tidal Bores
Reading a Tide Book (lab project)
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Fig. 11.8
TIDES OUTLINE
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Definition
Universal Law of Gravitation
Tidal Day / Forced Wave
Types of Tides: Diurnal, Semidiurnal and MixedSemidiurnal
Zero Tide
Spring Tides and Neap Tides
Flood Tides and Tidal Bores, Ebb Tides and Slack
Water
Progressive Tides and Rotary Tides, Amphidromic
Points
Tidal Bores
Reading a Tide Book (lab project)
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Naruto Whirlpool in Japan, occurs in a narrow channel
between Shiloku and Awaji Islands, several miles offshore!
Diameter ~ 20 meters, rate of spin ~ 20Km/hr
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Definition
Universal Law of Gravitation
Tidal Day / Forced Wave
Types of Tides: Diurnal, Semidiurnal and MixedSemidiurnal
Zero Tide
Spring Tides and Neap Tides
Flood Tides and Tidal Bores, Ebb Tides and Slack
Water
Progressive Tides and Rotary Tides, Amphidromic
Points
Tidal Bores
Reading a Tide Book (lab project)
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The TOPEX/Poseidon Satellite can measure the sea surface elevation using
Radar Altimetry. Ten measurements per second are taken as it tracks between
65 degrees north and south latitudes over 10 days. Tidal elevations have regular
periods so they can be separated from other sea surface changes.
Figure 10.13
Tidal Bore on the Qiantang River, East China
(aka: “Qiántáng Jiāng River”)
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Definition
Universal Law of Gravitation
Tidal Day / Forced Wave
Types of Tides: Diurnal, Semidiurnal and MixedSemidiurnal
Zero Tide
Spring Tides and Neap Tides
Flood Tides and Tidal Bores, Ebb Tides and Slack
Water
Progressive Tides and Rotary Tides, Amphidromic
Points
Tidal Bores
Reading a Tide Book (lab project)
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Tidal bore in the Turnagain Arm of
Cook Inlet, Alaska
Surfing on the French River Dordogne
(“doordo-ing”)
Brazilian surfer Savio Carneiro rides a tidal bore during a
competition on Brazil's Mearim River. The event took place
~18 miles (30 kilometers) inland in the Amazon jungle, near
the northern Brazilian city of Arari.
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