Tidal Patterns

Diurnal

Semidiurnal

Mixed semidiurnal

http://www.nos.noaa.gov/education/kits/tides/media/supp_tide02.html

Tide Generating Force

inertiagravity

Consider water-covered non-tilted Earth with no continents, and the affect of the moon alone:

Equilibrium model of tides

= egg shaped envelope (tidal bulge) that the Earth rotates within.

What type of tidal pattern would result from this configuration?

Lunar day shifting tidal cycle

Lunar day = 24 hours + 50 minutes

Declination of the moon

What is the tidal pattern at latitude A? at latitude B? in between A and B?

http://soconnell.web.wesleyan.edu/ees106/lecture_notes/lecture-tides/HTML%20Presentation%20folder/sld049.htm

Do tides interact with the seabed?

http://www-class.unl.edu/geol101i/14_coasts.htm

Frictional Drag

Add the sun…Spring tide and Neap tide

Declination of Sun (tilt of Earth’s axis)

Earth’s elliptical orbit around sun

http://eo.nso.edu/dasl/Lessons/Aphelion/eccentricity.gif

http://deschutes.gso.uri.edu/~rutherfo/milankovitch.html

Tides as Waves

Tidal currents:Flood tideEbb tideslackwater

http://www.beg.utexas.edu/UTopia/contentpg_images/gloss_barrier_island.jpg