Temperature: About half-18C
Precipitation: semi arid 200 to 500 mm. Year Evaporation is greater than the precipitation
Distribution: Proximal edges of deserts to tropical Ecuador, Africa and South Asia
Vegetation: Shrubs, xeromorphic woodlands, dry savana, thornbush.
Climatic criteria Tropical temperature regime and evaporation > precipitation.
Annual rainfall ranges between 200 and 500 mm.
Vegetation Shrubs, xeromorphic woodlands, dry savana, thornbush.
Distribution Most extensive in Africa and South Asia, where they form the
equatorward margins of the tropical deserts.