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L-10a_Tides_(1)

L-10a_Tides_(1) - Lesson 10 Tides Lesson 10 Tides AGENDA...

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3/28/14 Lesson 10: Tides
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Lesson 10: Tides AGENDA: Types of Tides Tidal Reference Planes Predicting the Height of Tides Applicable reading: Hobbs pg. 177-198.
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Tides Defined Tide The vertical rise and fall of the ocean level due to the gravitational and centrifugal forces between the earth and the moon, and to a lesser extent, the sun.
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Spring Tides Spring Tides When the tidal effects of the sun and the moon act in concert. Produces higher high tides and lower low tides
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Neap Tides Neap Tides When the tidal effects of the sun and the moon are in opposition to one another. Produces lower high tides and higher low tides
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Tidal Terminology Sounding Datum High Tide or High Water Flood Low Tide or Low Water Ebb Range of Tide Stand
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Types of Tides Semidiurnal Tide Diurnal Tide Mixed Tide
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Tidal Patterns Semidiurnal Observed on US East Coast
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Tidal Patterns Diurnal Observed in northern Gulf of Mexico, Java Sea, Tonkin Gulf.
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Tidal Patterns Mixed Observed on U.S. Pacific coast, Pacific Islands.
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Tidal Reference Planes Mean low water (MLW) avg of all low-tide water levels, 19-year period Mean lower low water (MLLW) avg of the lower of the low-water levels each tidal day, 19- year period Basis for low-water prediction on US charts *** Mean low water springs (MLWS) avg of all spring tide low-water levels
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  • Spring '14
  • Spring Tides, Tide, Ht Diff, Ref Sta

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