I want to know the answer to the following question:
What is the reason the northern fringe receives more   cloudiness and rainfall?
All the background I'm provided with is that "The thin northern fringe of the desert receives more winter cloudiness and rainfall due to the arrival of low pressure systems over the Mediterranean Sea along the polar front, although very attenuated by the rain shadow effects of the mountains and the annual average rainfall ranges from 100 mm (3,93 in) to 250 mm (9,84 in).". Is that enough to answer the question?
Answer: yes