Keywords : Climate


Study the Effect of the Amount of Clouds on the Number of Actual Hours of Sunshine at Selected Stations in Iraq

Jawdet Hedayet Mohammed

Kirkuk University Journal-Scientific Studies, 2021, Volume 16, Issue 1, Pages 1-27
DOI: 10.32894/kujss.2021.167891

This research aims to study the effect of the amount of clouds on the number of actual hours of Sunshine in selected stations in Iraq, namely (Mosul Station, Baghdad Station, Basra Station), using data (the amount of clouds and the number of actual hours of Sunshine) for a period of (31 years) for the period extending from (1980 - 2010), which were obtained by data available in the Iraqi Meteorological organization and Seismology. In this research, the effect of the amount of clouds on the number of actual hours of Sunshine was clarified by studying the monthly and seasonal change of the two variables, in addition to clarifying the nature of the relationship between them by calculating the correlation coefficient using Microsoft Excel (2010). The results indicated that there is a strong inverse correlation between both variables in The three study stations, where the values ​​of correlation coefficients ranged between (-0.92) – (-0.87) in the study sites, and this indicates that with the increase in the amount of clouds the number of hours of actual hours of Sunshine decreases, and vice versa.

Identify Months of Comfort and Discomfort Using the Temperature-Humidity Index at Selected Stations in Iraq

jawdet hedayet Mohammed

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 4, Pages 87-106
DOI: 10.32894/kujss.2021.167519

In this research, the months of comfort and discomfort were identified using the Temperature-Humidity Index in selected stations in Iraq (Mosul, Baghdad, Basra) using data of the temperature and relative humidity values of the period (1983-2019) obtained from the Iraqi Meteorological organization and Seismology. The results showed that the months of discomfort in the three study stations were (January, July, August, December), while the months of comfort in the three study stations were both (April, September), while the months (February, March, June, September, November) alternated between comfort and discomfort in the three study stations. This research also clarified the effect of both temperature and relative humidity on the values of the Temperature-Humidity Index by clarifying the nature of the relationship between them by calculating the coefficient of correlation using Microsoft Excel (2010), where the results showed a linear strong correlation between temperature and Temperature-Humidity Index values, where the values ​​of correlation coefficients ranged between (0.996) – (0.997), while the correlation was inversely strong between relative humidity and Temperature-Humidity Index values where the values ​​of correlation coefficients ranged between (-0.985) – (-0.959) in the study stations, this indicates that the increase in the value of temperature and decrease relative humidity leads to an increase in the values of the Temperature-Humidity Index, and vice versa.

Calculation the Drought Index and Determination the Type of Climate for the Rainy Months in the Selected Stations in Iraq

Jawdet Hidayat Mohammed

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 2, Pages 63-78
DOI: 10.32894/kujss.2020.15.2.5

This Study aims to calculate the drought index by application the de Martine equation and determine the type of climate for rainy months in the three selected stations in Iraq (Mosul, Baghdad and Nasiriya) by use data of (Rainfall and Temperature) for the period ranged (1970 to 2010), which was recorded from the "Iraqi Meteorological Organization and seismology" in Baghdad.
The results appears that the climate is humid in the months (December and January), the climate is variable between (wet and semiarid) in the months (February, March, April and November), while the climate is variable between (semiarid and arid) in the months (May and October) as a result of variation the values of (Rainfall and Temperature) for rainy months in the three studying stations.
In this research the relationship between values of drought index and the rainfall amount and temperatures has been showing by calculation the correlation coefficient and also obtained simple linear regression by applying program of Microsoft excel (2010), the results indicated the existence of strong linear correlation between the drought index and rainfall in the three studying stations values between (0.96) – (0.98), while the results showed the occurring of strong inverse correlation between the drought index and temperatures in the three studying stations values between (-0.93) – (-0.98) in the three stations.

Study the Relationship between the Solar Radiation and the Air Temperature in Kirkuk Governorate

Jawdet H. Mohammed

Kirkuk University Journal-Scientific Studies, 2019, Volume 14, Issue 3, Pages 116-132
DOI: 10.32894/kujss.2019.14.3.10

The study goal to study the relation between the solar radiation and air temperature in the different locations of Kirkuk governorate (Latitude: 35.47°N, Longitude: 44.39°E) (Haweij, Qar enger, Daquq and Alton Copry) from using data of (Solar radiation and air temperature) for the year (2013), was available from the Iraqi Agro meteorology Network / Ministry of Agriculture.
In this study the relationship between Solar radiation and air temperature has been investigated by calculation the correlation coefficient by using program of Microsoft excel (2010), results show strong linear correlation between the monthely and seaseonally sum of solar radiation and the monthely and seaseonally average of air temperature in the four studying locations.
Monthely correlation coefficient between (0.93 – 0.96), in the other hand Seaseonally correlation coefficient between (0.91 – 0.99) in studying locations. This indicates that the increasing in solar radiation leads to increase the values of air temperature, and the decreasing in solar radiation leads to decrease the values of air temperature.
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Study the Relationship between the Surface Air Temperature and the Evapotranspiration in Kirkuk City of Iraq.

Jawdet Hidayat Mohammed

Kirkuk University Journal-Scientific Studies, 2019, Volume 14, Issue 2, Pages 145-159
DOI: 10.32894/kujss.2019.14.2.9

This research aims to study the relationship between the surface air temperature and the evapotranspiration In the stations of Kirkuk city (Latitude: 35.47 °N, Longitude: 44.39° E) (Haweija, Alton Copery, Daquq and Qara enger) by using data of (Surface Air Temperature and Evapotranspiration) In (2013), which was obtained from the Iraqi Agro meteorology Network / Ministry of Agriculture.
In this study the relationship between air temperature and values of evapotranspiration has been investigated by calculation the correlation coefficient by using program of Microsoft excel 2010, the results indicated the existence of strong linear correlation between the monthly and seasonally average of air temperature and the monthly and seasonally sum of evapotranspiration In the four studying stations.
Monthly correlation coefficient values between (0.963 – 0.978), while Seasonally correlation coefficient values between (0.80 – 0.99) in studying stations. This indicates that the increasing in surface air temperature leads to increase the values of evapotranspiration, and the decreasing in surface air temperature leads to decrease the values of evapotranspiration
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