Facts about Ethiopia

The mean annual water surplus shown by the map is the sum of monthly excesses of rainfall over potential evapotranspiration when soil moisture storage is assumed to be at field capacity.
Basically the water surplus is considered to be approximately equal to surface runoff since the determination of the surplus is derived from the inflow-outflow hydrological [...]

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The record showing the mean annual water deficit broadly indicates the regional variation in the magnitude of the mean annual moisture deficiency for plant growth and development.
The amount of moisture deficit is the excess of potential evapotranspiration over rainfall when soil moisture storage is assumed to be nil. The calculations are made on a monthly [...]

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The record, which shows the moisture regions of Ethiopia, is based on moisture indices determined by working out monthly water surpluses and deficiencies for some one hundred and forty climatic stations in Ethiopia.
The amounts of water surplus and deficit calculated on a monthly basis, represent, respectively, positive and negative values of the difference between rainfall [...]

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The daily measure of the mean surface wind speed and direction of ten minutes average at 1200 (noon) local time at the various stations are grouped in accordance with the seasonal wind prevailing directions.
The wind roses diagrams are drawn to obtain the complete picture of the seasonal wind for selected stations.
The wind speed is expressed [...]

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Previously in Ethiopia, as the awareness of the need to collect climatic data increased, climatological stations were established by various organizations such as the Water Resource Development Authority, to meet their particular needs.
Most of these stations are located in large towns. In some of these stations, the lack of continued observation has created serious data [...]

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The climatic map drawn according to the Koppen System, shows the various climatic regions of Ethiopia.
This system is based on the annual and monthly means of temperature and rainfall also on seasonal changes of rainfall and types of native vegetation associated with them.
The climatic types range from equatorial desert to hot and cool steppe, and [...]

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The sun is the source of life on earth. It is the prodigious inflow of solar energy in the form of sunshine and radiation that produces, through photosynthesis, all the food, fuel and free oxygen upon which life on earth depends.
The total amount of solar energy reaching the earth is about 7X1017KW hr. per year, [...]

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Latitude, altitude, winds and humidity, with varying magnitude have significant impacts on temperature conditions in Ethiopia.
As the sun’s radiation is the source of all heat on earth, latitude is the primary consideration in the understanding of temperature.
Ethiopia lies within the tropics (30N to 180N latitude), a zone of maximum insolation where every place has overhead [...]

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Climatic variabilities among others have caused frequent drought and famine that have ravaged the people of Ethiopia for generations.
It is a paradox that this country is on the “world hunger list”. However, the maps on hail, frost, rainfall patterns and variability reveal the vagaries of nature that intermittently cause disruption to normal life.
The graph showing [...]

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This blog shows mean annual and mean seasonal rainfall distribution in Ethiopia. The data employed to depict these records is a mean average that ranges from five to thirty years.
The inter-annual oscillation of the surface position of the Inter-Tropical Convergence Zone (ITCZ) causes a variation in the wind flow patterns over Ethiopia.
In its oscillation to [...]

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