Wind power density was calculated using hourly simulated
wind speed, temperature, pressure, and relative humidity. Values
for these variables were interpolated to desired heights from
MM5 vertical levels using a cubic spline method. It is noted that
relative humidity was used to account for air density dependency
on moisture. Annual and three-monthly (DJF, MAM, JJA, and
SON as sequential calendar months) mean wind power densities
at a grid cell and height were derived from hourly data.