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The coefficient of wind shear at low and high frequencies, from diurnal and seasonal variations to disturbance caused by weather patterns, is subject to temporal fluctuations, but in many cases, the coefficient of wind shear assumed as a constant. This presumption causes major resource management errors, raises instability in projects and potentially affects the ability to control the wind turbines connected to the grid. Hourly average of 10 m wind speed with a standard (50 m) height employed to estimate the WSC with the well-known power equation for the wind profile law. This paper estimates WSC from wind speed data on three sites in Iraq. Monthly wind speed and wind direction changes were determined for these locations. The variations of WSC in one year are (0.23, 0.2, and 0.35) for Al-Shehabi, Al-Najaf, and Al-Fajer respectively. In the summer months (June to September) it is obvious that average wind speeds in all select areas increase while in other seasons they are almost decreasing. The WSC had neural diurnal and monthly variations. Due to the increased temperature at this period of year, WSC has decreased at mid-day, and this is valid for all studied site during the winter and summer days. The stability of atmosphere conditions was determined as stable, stable, and strongly stable for Al-Shehabi, Al-Najaf and Al-Fajer sites respectively.

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This work aims to study wind factor 10 m above the ground level for different stations in Iraq for determining the promising regions in the field of wind energy. For this purpose, the use of data (Wind Speed) for 25 years is performed. Missing data may occur within the time series of processing. Calculations are performed by using the statistical model (ARIMA model). The analysis of data is performed by using the Geographic Information System Program (Arc map). The temporal and spatial distribution of wind speed shows that the high value during the summer and the autumn in the southern stations (Hai, Nasiriyah, Basrah, Amara) can be considered as the promising regions in Iraq.