Abstract
This study deals with the magnitude of influence of various geographical factors and meteorological variables on land cover among six meteorological stations Rabiah, Anna, Kirkuk, Mosul, Baghdad and Najaf.
The statistical analysis focuses on the means of annuals during 1961-1995
The geographical factors include distance from the Najaf station and the effect towards studied stations. The meteorological variables considered include wind speed, mean temperature and relative humidity. Regression analyses were performed with distance and surface temperatures. Results revealed that surface temperature affected land cover across all study. Temperatures in land cover (vegetated areas) were lower than those in other area in seasons. Relative humidity has significant on all the stations has been studied with land cover as getting increase as close to be near land cover, the relation stronger in the north and in winter season. Wind speed has no significant only minor influence in summer on the north stations, Rabiah,Anaa,
Kirkuk and Mosul because the
extension of the mountains from the northwest to the southeast is a responsible factor affecting the wind speed since, topographically ,lands are high in the west and east ,and depressed in middle and south. By calculating, adjusting and unified the studied station with same period for one high on sea level for mean temperature, it was found same result of effective of land cover.
The statistical analysis focuses on the means of annuals during 1961-1995
The geographical factors include distance from the Najaf station and the effect towards studied stations. The meteorological variables considered include wind speed, mean temperature and relative humidity. Regression analyses were performed with distance and surface temperatures. Results revealed that surface temperature affected land cover across all study. Temperatures in land cover (vegetated areas) were lower than those in other area in seasons. Relative humidity has significant on all the stations has been studied with land cover as getting increase as close to be near land cover, the relation stronger in the north and in winter season. Wind speed has no significant only minor influence in summer on the north stations, Rabiah,Anaa,
Kirkuk and Mosul because the
extension of the mountains from the northwest to the southeast is a responsible factor affecting the wind speed since, topographically ,lands are high in the west and east ,and depressed in middle and south. By calculating, adjusting and unified the studied station with same period for one high on sea level for mean temperature, it was found same result of effective of land cover.
Abstract
تناول هذه الدراسة مقدار التأثير للمتغيرات الجغرافية والمتغيرات الانوائية على سطح الأرض لمغطاة لستة محطات انوائية هي ربيعة،عانة،كركوك، الموصل،بغداد والنجف.التحليلات الإحصائية ركزت على المعدلات السنوية خلال الفترة من ( ١٩٩٥-١٩٦١) إن العامل الجغرافي تضمن المسافة عن حطة النجف ومدى التأثير كلما اتجهنا نحو المحطات المدروسة. إما بالنسبة للمتغيرات الانوائية هي سرعة الريح ،معدل درجة الحرارة والرطوبة النسبية .وبحساب معامل الانحسار للمسافة مع معدل درجة لحرارة النتائج أشارت بأنه هنالك علاقة بتأثير الغطاء مع درجة الحرارة حيث تكون اقل لسطح الأرض مغطاة بالغطاء النباتي بغير المغطاة لجميع فصول السنة. إما بالنسبة للرطوبة النسبية لها إشارة واضحة مع كثافة الغطاء النباتي وتزداد بالاقتراب من الغطاء النباتي والعلاقة تكون كبيرة في القسم الشمالي وفي صل الشتاء. لا يوجد تأثير لسرعة الرياح فقط تأثير بسيط على المحطات الشمالية ربيعة،كركوك، عانة والموصل وذللك بسبب امتداد السلاسل الجبلية من الشمال الغربي إلى الجنوب الشرقي وهذا العامل لمؤثر اعتمد على طبوغرافية الأرض حيث تكون مرتفعة في الغرب والشرق ومنخفضة في الوسط والجنوب .كذلك تم حساب وتعديل وتوحيد المحطات المدروسة لنفس الفترة الزمنية المذكورة أعلاه لارتفاع موحد عن مستوى سطح البحر لمعدل درجة الحرارة وقد استنجت نفس التأثير لغطاء سطح الأرض.
Keywords
adjusting and unified the studied station with same period for one high on sea level for mean temperature
Anaa
and depressed in middle and south. By calculating
Anna
Baghdad and Najaf. The statistical analysis focuses on the means of annuals during 1961-1995 The geographical factors include distance from the Najaf station and the effect towards studied stations. The meteorological variables considered include wind speed
it was found same result of effective of land cover.
Kirkuk
Kirkuk and Mosul because the extension of the mountains from the northwest to the southeast is a responsible factor affecting the wind speed since
lands are high in the west and east
mean temperature and relative humidity. Regression analyses were performed with distance and surface temperatures. Results revealed that surface temperature affected land cover across all study. Temperatures in land cover (vegetated areas) were lower than those in other area in seasons. Relative humidity has significant on all the stations has been studied with land cover as getting increase as close to be near land cover
Mosul
Rabiah
the relation stronger in the north and in winter season. Wind speed has no significant only minor influence in summer on the north stations
This study deals with the magnitude of influence of various geographical factors and meteorological variables on land cover among six meteorological stations Rabiah
topographically