Document Details

Document Type : Article In Journal 
Document Title :
Estimation of Roughness Parameters and Sensible Flux in the Hada Al-Sham Area, Makkah
تقدير عناصر الاحتكاك وفيض الحرارة المحسوسة في منطقة هدى الشام، مكة المكرمة
 
Document Language : English 
Abstract : Examples of computed roughness length (m) in the Hada Al-Sham were presented as: Between Jumad El-Awwal, 6th and 12th except on 9th, the peak value was 1.6m at 1900 h, lower values of were observed and remained very close to an average of 0.03m between 1100-2000 h when the wind direction was nearly SW with an average wind direction of 255º. The higher friction velocities (ms–1) were found in the afternoon with an average of about 0.4 ms–1 with less effect of winds. Examples of maximum values of on J. El-Awwal 9th attained up to 0.8 ms–1at about 1900 h, on J. El-Awwal 12th 1.0 ms–1 at 2100 h and on J. El-Awwal 15th 1.7 ms–1at 1730 h. The higher friction velocity on J. El-Awwal 9th, was probably due to the change of the wind direction from SW (~223°) which was recorded at 1900 h to westerly wind at 1930 h (275º). The maximum value of sensible heat flux was found as 1118 Wm–2 at 1400 h on J. El-Awwal 15th. Another maximum value of H was found as 1200 Wm–2 at 1200 h on J. El-Awwal 21th. The afternoon peak values of H were found between 550 Wm–2 and ~ 700 Wm–2 from J. El-Awwal 6th until J. El-Awwal 13th. 
ISSN : 1319-1039 
Journal Name : Meteorology, Environment and Arid Land Agriculture Sciences Journal 
Volume : 20 
Issue Number : 2 
Publishing Year : 1430 AH
2009 AD 
Article Type : Article 
Added Date : Monday, December 14, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
عمر محمد يعقوب عنبرAnbar, O. M.Y.ResearcherDoctorate 

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