What wind speed creates waves?
| Force | Name | Wind Speed knots mph |
|---|---|---|
| 5 | Fresh breeze | 17-21 |
| Wave height: 2-2.5 m (6-8 ft) – Sea: Moderate waves – Many whitecaps | ||
| 6 | Strong breeze | 22-27 |
| Wave height: 3-4 m (9.5-13 ft) – Sea: Larger waves forming – Whitecaps everywhere |
How big are waves in mph winds?
They can travel thousands of miles and range in size from tiny wavelets to over 100 feet tall. Waves caused directly by the local wind are called wind waves. Wind waves are short, choppy, and tend to break (white cap) when winds reach approximately 17 miles per hour.
What is the relationship between wind and waves?
Wave height is affected by wind speed, wind duration (or how long the wind blows), and fetch, which is the distance over water that the wind blows in a single direction. If wind speed is slow, only small waves result, regardless of wind duration or fetch.
How do storm winds affect waves?
The high winds associated with tropical and extratropical storms can cause extreme waves and storm surges. Storm surges, caused by a combination of low barometric pressure and high onshore winds, can raise sea level by several meters.
What is the relationship between wind and ocean waves quizlet?
Wind blowing across water transfers energy to that water. Energy creates tiny ripples which make an uneven surface for wind to catch and create larger waves. The waves travel across the ocean out of the area where the wind is blowing.
Do waves cause wind?
Just as sound waves are produced by vibrating objects, ocean waves are produced by the oscillations of currents. In the same way that sound activates receivers through induced pressure differences in the receiver, sea waves cause pressure differences in the air which become wind.
How are wind waves generated quizlet?
Wind waves form when a water surface irregularity deflects wind upward, slows it, and causes some of the wind’s energy to be transferred into the water to drive the wave crest forward. Fetch is the distance wind blows across the ocean to generate sets of wind waves.
How big will the waves get in 24 hours?
How Big Will the Waves Get? Assume Duration = 24 hours Fetch Length = 500 miles Significant Significant Wind Speed Wave Height Wave Period 10 mph 2 ft 3.5 sec 20 mph 6 ft 5.5 sec 30 mph 12 ft 7.5 sec 40 mph 19 ft 10.0 sec 50 mph 27 ft 11.5 sec 60 mph 35 ft 13.0 sec Wave height will decay as waves move away from source region!!!
How tall are waves as they move away from the source?
Assume Duration = 24 hours Fetch Length = 500 miles Significant Significant Wind Speed Wave Height Wave Period 10 mph 2 ft 3.5 sec 20 mph 6 ft 5.5 sec 30 mph 12 ft 7.5 sec 40 mph 19 ft 10.0 sec 50 mph 27 ft 11.5 sec 60 mph 35 ft 13.0 sec Wave height will decay as waves move away from source region!!! Map of Mean Wind Speed (near surface):
What is the wind speed of the Beaufort Wind?
Beaufort Wind Scale 5 19-24 mph 29-38 kph 17-21 knots Fresh Breeze 6 25-31 mph 39-49 kph 22-27 knots Strong Breeze 7 32-38 mph 50-61 kph 28-33 knots Moderate or Near Gale 8 39-46 mph 62-74 kph 34-40 knots Gale or Fresh Gale
How can you tell the wind force of a wave?
Large branches in motion; umbrellas used with difficulty. Sea heaps up and white foam from breaking waves begins to be blown in streaks along the direction of the wind. walking against the wind. Moderately high waves of greater length; edges of crests begin to break into spondrift.