Semi-arid
From Wikipedia, the free encyclopedia
Semi-arid generally describes climatic regions that receive low annual rainfall (250-500 mm or 10-20 in) and have predominantly shrub or short-grass vegetation. A more precise definition is given by the Köppen climate classification that treats steppe climates (BS) as intermediates between the true deserts (BW) and humid climates in ecological characteristics and agricultural potential. The Köppen climate classification allows adjustments for temperature and for seasonality of precipitation, effectively excluding forested regions (such as those in most of Canada and Siberia).
Examples of types of semi-arid biomes are:
- Australia: a large portion of the Outback, surrounding the central desert regions, including the following areas:[1]
- MacDonnell Ranges, including Alice Springs. (The ranges are surrounded by arid desert regions.)
- Southern Kimberley, including Broome
- Central part of the WA Goldfields, including Kalgoorlie
- Western Pilbara, including Karratha
- Eastern Riverland, northern Victorian Mallee and Sunraysia, including Mildura
- Central North West Queensland, including Mount Isa
- Coastal part of the Far North region of South Australia, including Port Augusta
- Brazil: the Sertão
- Kazakhstan: the Steppe
- North Africa: the Sahel on the southern edge of the Sahara
- Spain: the south-east zone: province of Alicante, province of Almeria and Region of Murcia. This climate is called arid mediterranean.
- United States: the western interior, including the following states (except above the tree line in the mountain states and in some localized areas):
- Canada: The southern Prairie Provinces, that being southern Alberta, southern Saskatchewan and extreme southwestern Manitoba
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| Climate types under the Köppen climate classification |
|---|
| Class A: Tropical (Af) - Monsoon (Am) - Savanna (Aw, As) |
| Class B: Arid (BWh, BWk) - Semi-arid (BSh, BSk) |
| Class C: Humid subtropical (Cfa, Cwa) - Oceanic (Cfb, Cwb, Cfc) - Mediterranean (Csa, Csb) |
| Class D: Humid continental (Dfa, Dwa, Dfb, Dwb) - Subarctic (Dfc, Dwc, Dfd) - High-altitude Mediterranean (Dsa, Dsb, Dsc) |
| Class E: Polar (ET, EF) - Alpine (ETH) |
