I'm doing a GIS school project where I have to use the GIS software to locate and assess a suitable area for an offshore windfarm. As I live in Hong Kong city (Southern China), I'm going to base my project around the coastal area of the city. But I'm having a really hard time finding data that will allow me to map out wind speed and/or wind density so that I can produce contour maps like the one below. Help is much appreciated. Thanks!