Abstract
Estimation of Net Radiation in Iraq
Highlights
The determination of earths radiation budget is essential for atmospheric medeling, climatic studies and for estimating reference crop evapotrnspiration (Steven and Knot, 2003; Alados et al, 2003 )
The net radiation (Rn) is the difference between incoming and outgoing radiation of both short and long wave lengths, so it represent the balance between the energy absorbed,reflected and emitted by the earth surface (Kjaersgraard, 2007). (Rn) is normally positive during the day time and negative during the night time
1.Comparison between measured and estimated values of incoming short wave radiation (Rs) : The values of (Rs) estimated by Model and that measured by the actinography in Mosul, Baghdad and Nasiriyah stations during the months of the year were presented by table (2)
Summary
The determination of earths radiation budget is essential for atmospheric medeling, climatic studies and for estimating reference crop evapotrnspiration (Steven and Knot, 2003; Alados et al, 2003 ). لتخمين محصلة الإشعاع الشمسي الساقط على السطح الأفقيFAO-56 تم استخدام النموذج الرياضي التي تم الحصول عليها بواسطة النموذج أظهرت ان محطة الموصلRn .والناصرية والموصل على التوالي أعطت أوطأ القيم مقارنة بمحطتي بغداد والناصرية وذلك اعتمادا ً على كمية الإشعاع الشمسي الواصـل إلـى
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