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- Unlike drought, aridity describes the long-term average dryness of a region, which leads to limited or low water content in the soil. Aridity can lead to soil erosion, salinisation and other forms of land degradation; it can also set off or exacerbate water-related conflicts in affected regions.
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Nov 19, 2021 · As average temperatures rise and rainfall patterns change, the stereotypical ‘arid’ regions of Europe may need a rethink. Increasing aridity is an important hazard for many ecosystems and economic sectors, including water management, agriculture, forestry and tourism.
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The AI is a widely used measure of dryness of the climate at a given location. Using the AI, six subtypes of arid lands or drylands are classified: cold, hyper-arid, arid, semi-arid, dry subhumid and humid.
The United Nations Environment Program defines drylands as tropical and temperate areas with an aridity index of less than 0.65. One can classify drylands into four sub-types: Dry sub-humid lands; Semi-arid lands; Arid lands; Hyper-arid lands
Arid lands, defined as arid, semiarid, are among the world’s most fragile lands, caused by continuous drought and increasing overexploitation. These lands occupy nearly 30% of the world’s land surface ( Fig. 4.1 ).
Aridity is the condition of a region that severely lacks available water, to the extent of hindering or preventing the growth and development of plant and animal life. Regions with arid climates tend to lack vegetation and are called xeric or desertic.
Jul 10, 2024 · desertification, the process by which natural or human causes reduce the biological productivity of drylands (arid and semiarid lands).
Arid and semiarid zones, generally defined as regions where the rate of evaporation is significantly greater than that of precipitation, occupy more than 40% of...
