دراسة العلاقة بين الكتل الهوائية الشتوية و الخصائص المناخية في شمال المملكة العربية السعودية

الملخص EN

In previous research entitled "characteristics of wind surface and its environmental effects in north Saudi Arabia", the air masses prevailing in northern Saudi Arabia were classified, and the number of days of each mass.

This has raised several questions, including : What is the relationship between the climatic characteristics of air masses and the general nature of climate prevailing in the region? What is the relationship between the frequencies of dry polar clusters and temperatures in the northern region? This study presents a classification of the air masses prevailing in the Kingdom, through the use of daily weather patterns.

Through this, we can determine the relationship between the detailed climate characteristics for the prevailing air masses and the general climatic feature in January.

We can also determine the general change by using the number of days for each mass.

The research concluded that the two polar masses "Dry and Humid’ merge in 45-56% in January in the north of the kingdom, while the dry air mass merge in 44-55% in January.

This is in the study period that is 1985-2007.

The general change revealed that there is the decline in the prevailing of dry polar mass, which is due to a decrease in cold currents.