Friday, January 2, 2009

Ocean wind power maps

Maps show potential areas where winds might produce energy.

This is an image of QuikScat data that shows wind power density over global oceans for northern hemisphere winter (top panel) and summer (lower panel). Red and white colors indicate high energy, while blue color indicates lower energy. Click image for an enlarged view. Image courtesy: NASA/JPL

Efforts to harness the energy potential of Earth's ocean winds could soon gain an important new tool: global satellite maps from NASA. Scientists have been creating maps using nearly a decade of data from NASA's QuikScat satellite that reveal ocean areas where winds could produce energy.

The new maps have many potential uses including planning the location of offshore wind farms to convert wind energy into electric energy. The research, published this week in Geophysical Research Letters, was funded by NASA's Earth Science Division, which works to advance the frontiers of scientific discovery about Earth, its climate and its future.

"Wind energy is environmentally friendly. After the initial energy investment to build and install wind turbines, you don't burn fossil fuels that emit carbon," said study lead author Tim Liu, a senior research scientist and QuikScat science team leader at NASA's Jet Propulsion Laboratory in Pasadena, Calif. "Like solar power, wind energy is green energy."

QuikScat, launched in 1999, tracks the speed, direction and power of winds near the ocean surface. Data from QuikScat, collected continuously by a specialized microwave radar instrument named SeaWinds, also are used to predict storms and enhance the accuracy of weather forecasts.

Ocean Wind Power Maps

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