Which climate features distinguish northern Africa from most of sub-Saharan Africa?

Northern Africa is distinguished from most of sub-Saharan Africa by its unique climatic zones and air mass influences. While much of sub-Saharan Africa is dominated by tropical climates—including equatorial, tropical wet-and-dry, and semiarid regions—northern Africa is characterized by a Mediterranean climate along its coastal fringes and a dry subtropical climate across the Sahara.12

Key features that distinguish northern Africa include:

• Mediterranean Influence: Northern coastal areas experience a dry-summer subtropical climate, where rainfall occurs primarily during the winter months (December–January), contrasting with the summer-dominant rainfall patterns found in much of sub-Saharan Africa.13
• Air Mass Dominance: Northern Africa is largely under the influence of a dry continental tropical air mass, particularly the Saharan anticyclone, which creates extreme diurnal and annual temperature ranges.124
• Precipitation Patterns: Unlike the equatorial regions of sub-Saharan Africa, which receive heavy, bimodal rainfall driven by the intertropical convergence zone (ITCZ), northern Africa is characterized by high aridity, with much of the region receiving very little annual precipitation.14
• Seasonal Winds: The region is subject to hot, dry, dust-laden winds such as the sirocco, khamsin, and ghibli, which significantly impact local temperatures and humidity levels.235