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A semi-arid climate, semi-desert climate, or steppe climate is a dry climate sub-type. It is located on regions that receive precipitation below potential evapotranspiration, but not as low as a desert climate. There are different kinds of semi-arid climates, depending on variables such as temperature, and they give rise to different biomes.
The lowest temperature measured within Africa was −24 °C (−11 °F) at Ifrane, Morocco, on 11 February 1935. [9] Nevertheless, the major part of Africa experiences extreme heat during much of the year, especially the deserts, semi-deserts, steppes and savannas. The African deserts are arguably the hottest places on Earth, especially the ...
Desert and semi-arid climates are defined by low precipitation in a region that does not fit the polar (EF or ET) criteria of no month with an average temperature greater than 10 °C (50 °F). The precipitation threshold in millimeters is determined by multiplying the average annual temperature in Celsius by 20, then adding:
The six climate classifications use the term to help define the various temperature and precipitation regimes for planet Earth. A great portion of the world's deserts are within the subtropics, as this is where the semi-permanent subtropical anticyclone resides (typically inland on the southwest sides of continents).
To delineate "hot desert climates" from "cold desert climates", a mean annual temperature of 18 °C (64.4 °F) is used as an isotherm so that a location with a BW type climate with the appropriate temperature above this isotherm is classified as "hot arid subtype" (BWh), and a location with the appropriate temperature below the isotherm is ...
Semi-arid Niger. A semi-arid desert or a steppe is a version of the arid desert with much more rainfall, vegetation and higher humidity. These regions feature a semi-arid climate and are less extreme than regular deserts. [34] Like arid deserts, temperatures can vary greatly in semi deserts.
In the desert, the dry air and clear skies give rather large ranges in temperature between day and night. Ranges of 15 °C being typical and 20 °C not quite unusual. Light nighttime frosts in winter occur over much of the southern half of the arid zone, where mean July minimum temperatures are mostly in the 3 to 6 °C range. Moving north ...
Two types of semi-desert, referred to as "grassland" in Australia, occur in the Australian deserts: ... Summer daytime temperatures range from 32 to 50 °C (90 to 122 ...