 
 <prompt> Which of the following no be type of barrier to precipitation: physical, equatorial, or atmospheric? Given the previous question, write a context wey contain the answer. E fit be 1 - 20 sentences. Context: <response>: The main source of rain for Sahara na di equatorial low, wey be continuous belt of low-pressure systems near di equator wey dey bring di brief, short and irregular rainy season to Sahel and di southern Sahara. Sahara no dey lack precipitation because of lack of moisture, but because of lack of precipitation-generating mechanism. Rain for dis big desert dey face physical and atmospheric barriers wey dey normally prevent di production of precipitation. Di harsh climate of Sahara dey show extremely low, unreliable, highly erratic rainfall; extremely high sunshine duration values; high temperatures all year round; negligible rates of relative humidity, significant diurnal temperature variation and extremely high levels of potential evaporation wey be di highest recorded worldwide. 