Abstract
Problem statement: Temperature trend's investigation is important for proper water resources management and urban planning. This study aims to investigate trends and distribution of temperature in the past thirty years for the Kingdo m of Saudi Arabia (KSA), which represents about 86% of the Arabian Peninsula's area. Approach: The trend in the temperature time series, includin g the recorded maximum, average and minimum daily values, were analyzed using non-parametric statistics. These were Mann-Kendall tau coefficient and Sen's slope estimator. Results: (1): The study showed a warming trend through 9 months of the year except in November to January where non- significant cooling trends were observed. (2): The most significant warming trend appears in the summer months of June, August and September around the central region of KSA. (3) Spatially, The northwestern and southern regions were the least af fected by the warming trend. Conclusion: The study concluded that KSA as well as the Arabian Peninsula are suffering from a considerable warming temperature trend, which is an important issue to b e considered for rural development and water resources management.
Highlights
The earth’s climate is unstable; urbanization and greenhouse effect climate change in non-predictable manner (Can and Atimtay, 2004)
In general a significant warming trends is observed in almost all Saudi Arabia during the whole year except in the winter months of January and November and December to lesser degree
In all other months from February to October, a rising Tmax was observed in all parts of Saudi Arabia at varying degree of significance
Summary
The earth’s climate is unstable; urbanization and greenhouse effect climate change in non-predictable manner (Can and Atimtay, 2004). Climate change was defined by Landsberg (1975) as a shift in climatic conditions to a new equilibrium position with significantly changing values of the climatic-elements. Climate change highly influences human life in municipal and agricultural fields. Most of the climate factors, like temperature and relative humidity, affect plant water demand. Investigating changes in trend and magnitude of each climate factor will help in planning and management of agricultural systems. The climate change phenomenon was studied extensively in the last decades in both regional and global scopes (Schwartz and Randall, 2003)
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