(triangle), z0 = 0.01 (cross), a = 1/7 (square), and profile obtained (a) with the world average aLS = 0.23
(solid line) during the day and (b) with aL = 0.26 at night.
acquisition for this study. Second, remote areas with good wind power potential, but without meteorological stations, are not represented in this study. An example is the Dominican Republic, which was classified as non-suitable for wind power generation (class 1 and 2) in Figure 5. In the 1-km resolution analysis by Elliott et al. [2001a] showed instead substantial potential at 30 meters in the remote regions of the northwest and southwest. Similarly, Mongolia does not show appreciable wind power potential in Figure 8, but, according to the high-resolution study by Elliott et al. [2001b], has been estimated to have —10% of land with good-to-excellent wind potential for utility-scale (i.e., at 30 m) applications. Also, countries that for political reasons do not share their meteorological data with NCDC are not represented in this study either (e.g., Laos and Iraq). Finally, the lack of data over mountain chains, which generally offer a high wind
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Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.