Movie:Global Wave Power 2012: Difference between revisions

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Information Page: Global Wave Power 2012

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Global Wave Power 2012

Key Attributes

Domain:	coastal, marine
Keywords:	wave power, wave energy, Pacific ocean, Scotland, renewable energy
Model name:	WAVEWATCH III
Name:	Albert, Kettner
Where:	Global simulation
When:	Jan 1st, 2012 to Dec 31st, 2012

Short Description

Grade level: Middle (6-8), High (9-12), Under graduate (13-16)

Statement: Simulation of global wave power in 2012

Abstract: Meteorological offices worldwide forecast ocean wave heights for the shipping and fisheries industry. In the United States, NOAA's National Weather Service provides the wave forecasts. Just like in weather forecasting, scientists run numerical models to make these predictions. This movie shows wave power calculations of one of the most commonly used wave models, called ‘WAVEWATCH III®’. WAVEWATCH III® uses global and regional wind data to calculate wind-driven waves every three hours. The model also takes into account the travel of waves beyond the edges of a storm system, the waves still continue to advance even when winds are diminished. These waves decrease in steepness and are called ‘swells’ and keep traveling for large distances. Swells propagate to faraway shorelines where there is no wind.

Notable Features During the northern hemisphere winter, the most intense wave activity is located in the central North Pacific south of the Aleutian Islands, and in the central North Atlantic south of Iceland. During the southern hemisphere winter, intense wave activity circumscribes the pole at around 50°S, with 5 m significant wave heights typical in the southern Indian Ocean. You can identify the areas of coast that receive high wave power, like Australia, the West-coast of Southern France, Spain and Portugal, and the West Coast of the USA. If you see this pattern it comes as no surprise that the current engineering experiments to harvest wave energy as a source of alternative energy are in those regions (Portugal, Orkney Islands, Scotland, Oregon, USA and along the Australian coast near Perth).

Theory

Wave power, P, is calculated as a function of the significant wave height, Hs and wave period T (the time to complete one complete wave cycle):

P=(ρg^2 )/64π H_s^2 T

ρ = density of sea water, (on average 1050 kg/m3) g=gravitational constant, (9.81m/s2) π = 3.14

Links

http://polar.ncep.noaa.gov/waves/index2.shtml

References

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@@ Line 1: / Line 1: @@
 {{Upload movie
 |Movie type=Animation
+|Upload movie=XfEqVe3sHqQ
 |Upload image movie=WavepowerNorthPacific 2012.png
 |Caption movie=Global Wave Power 2012
@@ Line 21: / Line 22: @@
 |One-line movie description=Simulation of global wave power in 2012
 |Extended movie description=Meteorological offices worldwide forecast ocean wave heights for the shipping and fisheries industry. In the United States, NOAA's National Weather Service provides the wave forecasts. Just like in weather forecasting, scientists run numerical models to make these predictions.
+This movie shows wave power calculations of one of the most commonly used wave models, called ‘WAVEWATCH III®’. WAVEWATCH III®  uses global and regional wind data to calculate wind-driven waves every three hours.  The model also takes into account the travel of waves beyond the edges of a storm system, the waves still continue to advance even when  winds are diminished. These waves decrease in steepness and are called ‘swells’ and keep traveling for large distances. Swells propagate to faraway shorelines where there is no wind.
-Wind blowing across the ocean surface generates most ocean waves. Waves just transmit energy; the water itself does not travel with the passing of the energy. The water particles simply move up and backwards, up and forward, down and forward and finally down and backward with the passing of a wave form. This motion gives ocean waves their name: orbital waves.
-This movie shows wave power calculations of one of the most commonly used predictive models, called ‘WAVEWATCH III®’. WAVEWATCH III®  uses global and regional wind data to calculate wind-driven waves every three hours.
-This movie shows the wave power every 3 hours, worldwide for the year 2012. Locations with high wave power are focus regions for generating renewable energy from waves. Active projects are located in Oregon, USA, in Scotland and Portugal, and off the coast of Australia. Can you see why?
+Notable Features
+	During the northern hemisphere winter, the most intense wave activity is located in the central North Pacific south of the Aleutian Islands, and in the central North Atlantic south of Iceland.
+	During the southern hemisphere winter, intense wave activity circumscribes the pole at around 50°S, with 5 m significant wave heights typical in the southern Indian Ocean.
+	You can identify the areas of coast that receive high wave power, like Australia, the West-coast of Southern France, Spain and Portugal, and the West Coast of the USA.
+If you see this pattern it comes as no surprise that the current engineering experiments to harvest wave energy as a source of alternative energy are in those regions (Portugal, Orkney Islands, Scotland, Oregon, USA and along the Australian coast near Perth).
+}}
+{{Movie theory2
+|Theory movie=Wave power, P, is calculated as a function of the significant wave height, Hs and wave period T (the time to complete one complete wave cycle):
+P=(ρg^2  )/64π  H_s^2  T
+ρ = density of sea water,  (on average 1050 kg/m3)
+g=gravitational constant, (9.81m/s2)
+π = 3.14
 }}
-{{Movie theory2}}
 {{Movie references2
-|Movie website if any=: http://polar.ncep.noaa.gov/waves/index2.shtml
+|Movie website if any=http://polar.ncep.noaa.gov/waves/index2.shtml
 }}
 {{Annimation-reference-after}}