Question about deserts and their physical geographic distribution

Deserts are physical geographic locations with scanty rainfall - typically less than 15-10cm annually. They may be either hot or cold deserts.

Reasoned account of distribution - involves subtropical high pressure belt around 30°N and S, with discussing aig - destgging effect at no instability

Examples: Sahara desert; Kab-Al khali

Offshore lived system - contributing to low moisture conditions (E) Sonoran desert

Cold ocean currents - prevent evaporation, cloud formation, precipitation in coastal areas (E) Atacama desert - South America

Rain - shadow regions - (E) Patagonian desert in Argentina

Continuity - contributes to cold desert formation in interior Asia (E) Gobi desert - Table Nolan et al - 100 fan essay from Atlantic, moist air mass on sea no

Lack of physical barriers can in several lead to desert formation

Hence desert formation is the result of many different factors and in the era of climate change, desertification and level degradation are likewise