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An aridity index (AI) is a numerical indicator of the degree of dryness of the climate at a given location. The American Meteorological Society defined it in meteorology and climatology, as "the degree to which a climate lacks effective, life-promoting moisture".
Emmanuel de Martonne (French pronunciation: [ɛmanɥɛl də maʁtɔn], 1 April 1873 – 24 July 1955) was a French geographer. He participated in the Paris Peace Conference . Early life and education
Aridity ("drought") indexes that can be included in the article (after ): De Martonne Aridity Index; Emberger Aridity Index; UNEP Aridity Index; Thornthwaite Classification; Gaussen-Bagnouls Classification— Preceding unsigned comment added by 177.9.10.163 04:11, 2 September 2016 (UTC)
The northern portion of the Arid Diagonal is a result of the blocking of the trade winds by the barrier formed by the Central Andes and the South Pacific High. [5] To the south in the westerlies, the rain shadow that the Southern Andes cast over eastern Patagonia similarly blocks moisture. [1]
On a global scale, that results in 31% of crop and 34% of livestock production being outside of the safe climatic space. In contrast, under the low-emissions SSP1-2.6 (a scenario compatible with the less ambitious Paris Agreement goals, 5% and 8% of crop and livestock production would leave that safe climatic space.
Thornthwaite developed four indices: the Moisture Index (Im), the aridity and humidity indexes (Ia/Ih), the Thermal Efficiency Index (TE) and the Summer Concentration of Thermal Efficiency (SCTE). Each of the four climatic types can be described by an English alphabet letter and are arranged exactly by the order shown previously. [ 5 ]
The desert climate or arid climate (in the Köppen climate classification BWh and BWk) is a dry climate sub-type in which there is a severe excess of evaporation over precipitation.
Rules are provided for combining the stress (table 3) and humidity groups (table 2) to check a box classifying the humidity and aridity for each month. For each of six possible indicators, the number of months where that indicator was checked are added up, giving a yearly total. Schematic Design Recommendations. The yearly totals in table 4 ...