How long must the north wind blow for a fully developed sea to required)? hours Minimum fetch and duration required for selected wind speeds to set up fully developed seas Wind speed Fetch Duration...

Extracted text: How long must the north wind blow for a fully developed sea to required)? hours Minimum fetch and duration required for selected wind speeds to set up fully developed seas Wind speed Fetch Duration (knots) (nautical miles) (hours)* 10 2 20 70 10 30 280 23 40 710 42 50 1420 69


Extracted text: http://www. Then Click Make Waves Adjust wavelength and period to create the What adjustments create the highest waves? PK VEEN! Energy imparted by the wind increases the height, length, and speed of a wave. When wave speed es apeed neither wave length nor wave height can change because there is no net energy exchange roached its maximum size, this is called a fully developed sea. Factors that determine the amour waves are 1) wind speed, 2) the duration-length of time wind blows in one direction, and 3) fe over which the wind blows in one direction. One knot/hour = 1.85 km/hr. ace from San Pedro, California, to Avalon, on Santa Catal- A The island is almost due south (180) from the nan set up a fully develope alate between fo 3. OCE-3014L Lab 7-Waves & Longshore Currents 4. A storm is raging in the North Atlantic 2000 nautical miles due east from Cocoa Beach, Florida. The fetch of the storm (the distance of the open ocean that its winds are whipping up) is roughly 1000 nautical miles. Low pressure winter weather conditions are such that the winds are from the east. Refer to the table above interpolating the fetch distance to determine the wind speed to set up a fully developed sea. knots How long must the east winds blow for a fully developed sea? km/hour hours B. Swells The North Atlantic storm (above) was strong enough to whip up waves that slam into each other. If enough waves come together, their energy will create swell that can travel fast enough and far enough to survive a trip around the globe. Along the way, the less energetic, choppy elements of the wave will be lost and smooth glassy faced swell waves will arrive along Florida's east coast. Swell: Waves that have traveled a long distance from the generating area and have been sorted out by travel into long waves of the same approximate period, which may range between 12 and 24 seconds (longer than that of typical waves). The first swell arrives offshore encountering a water depth less than one-half its wavelength; it "feels bottom" encountering frictional drag along the bottom. The energy of the wave is compressed causing the crest of the wave to grow taller. It also slows down-the bottom of the wave slows down first, meaning the crest of the wave is traveling faster, overrunning the bottom part. The net result is the wave starts to peak increasing its steepness H/L. When wave steepness reaches a 1:7 ratio, the wave can no longer maintain its shape and spills out its energy in a few seconds by breaking on or near the beach. 5. Increases or Decreases? Choose the correct answer for the 4 blanks below. As waves come into shallow water and feel bottom Wavelength dueases decuaser Wave Height imceaser Wave Speed Wave Steepness incasaser 6. Use the internet to access the following site: