سمات رياح البوارح الهابة على المملكة العربية السعودية

Abstract EN

In the Summer, the kingdom of Saudi Arabia faces the dry northern blown wind called "Bawareh".

This wind blows on the lands of the kingdom from the northern parts due to the seasonal Indian low that overcomes the atmospheres of the kingdom in the summer.

This study was made to examine the environmental effects of this wind when it is blown on the kingdom of Saudi Arabia.

The study used the climatic data for 18 climatic stations following the general authority for metrology and environment protection for the period 1985-2010.

These stations are distributed on all directions of the kingdom.

The study showed that all studied stations face the blown wind of Bawareh except: Medina, Yanbu, Taif, and Gazan which means that the wind lows on the summer in all parts of the kingdom, but its frequency is different from one station to another.

The study also showed that the northern Bawareh wind is the most prevailing in the studied regions and that Ahssa occupies the first position among the studied stations in the highest rate of frequency for Bawareh wind where its fastness increases in June and July, but decreases in August.

The study also showed that the highest rate of speed for the Bawareh wind was recorded in Qurayat station with speed rate reaches to 20.4 km per hour in June, 21.9 km per hour in July and 20.6 km per hour in August.

In the next rank come the stations of Dharan, Wageh and Ahssa.

The northern western direction is the quickest direction for Bawareh wind in the studied region and the next is the north of the western north.

The study showed also that there is obvious difference in the period of the Bawareh blowing and the active days of blowing from one station to another where the active blowing of the wind starts at the beginning of June and continues intermittently and irregularly till the last of august.